Power Management

RB161SS-20T2R

Seiko Instruments Inc

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM / PFM SWITCHABLE SWITCHING REGULATOR

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www.sii-ic.com STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM / PFM SWITCHABLE SW ITCHING REGULATOR © SII Semiconductor Corporation, 2010 Rev.2.0_01 The S-8363 Series is a CMOS step-up switching regulator whic h consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circ uit, a current limit circuit, and a start-up circuit. Due to the operation of the PWM / PFM switching control, pulses are skipped under the light load operation and the S-8363 Series prevents decrease in efficiency caused by IC’s operating current. The S-8363 Series is capable of start-up from 0.9 V (I OUT = 1 mA) by the start-up circuit, and is suitable for applications which use one dry cell. The output voltage is freely settable from 1.8 V to 5.0 V by external parts. Ceramic capacitors can be used for output capacitor. Small packages SNT-6A and SOT-23-6 enable high-density mounting.  Features

Low operation voltage : Start-up from 0.9 V (I OUT = 1 mA) guaranteed
Oscillation frequency : 1.2 MHz
Input voltage range : 0.9 V to 4.5 V
Output current : 300 mA (V IN = 1.8 V, VOUT = 3.3 V)
Reference voltage : 0.6 V ±2.5%
Efficiency : 85%
Soft start function : 1.2 ms typ.
Low current consumption : During switching-off, 95 μA typ.
Duty ratio : PWM / PFM switching control m a x . 8 8 %
Power-off function : Current consumption during power-off 3.0 μA max.
Current limit circuit : limits the peak value of inductor current
Nch power MOS FET ON resistance : 0.25 Ω typ.
Start-up function : Operation with fixed duty pulse under the V OUT voltage of 1.4 V or less
Lead-free, Sn 100%, halogen-free *1 *1. Refer to “  Product Name Structure ” for details.  Applications
MP3 players, digital audio players
Digital cameras, GPS, wireless transceiver
Portable devices  Packages
SNT-6A
SOT-23-6

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01  Block Diagram Error Amplifier CIN VIN VOUT VOUT CONT VSS VIN ON/OFF Internal Power Supply ON/OFF Circuit Reference Voltage Source PWM Comparator VIN Σ VOUT RFB2 RFB1 SD − FB Current Limit Circuit Oscillation Circuit SLOPE Compensation STU Mode Circuit MUX + Start-up Circuit L = 2.2 μH COUT 10 μF Switching Control Circuit CFB Figure 1

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series  Product Name Structure Users can select the packages for the S-8363 Series. Refer to “ 1. Product name ” regarding the contents of product name, “2. Package ” regarding the package drawings and “3. Product list ” regarding the product type. 1. Product name S-8363B - xxxx U 2 Environmental code U: Lead-free (Sn 100%), halogen-free Package name (abbreviation) and IC packing specification*1 I6T1: SNT-6A, Tape M6T1: SOT-23-6, Tape *1. Refer to the tape specification. 2. Package Package name Drawing code Package Tape Reel Land SNT-6A PG006-A-P-SD PG006-A-C-SD PG006-A-R-SD PG006-A-L-SD SOT-23-6 MP006-A-P-SD MP006-A-C-SD MP006-A-R-SD − 3. Product list Table 1 SNT-6A SOT-23-6 S-8363B-I6T1U2 S-8363B-M6T1U2 Remark Please select products of environmental code = U for Sn 100%, halogen-free products.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01  Pin Configurations SNT-6A Top view 3 4 Table 2 SNT-6A Pin No. Symbol Description

1 FB Output voltage feedback pin

2 VSS GND pin

3 CONT External inductor connection pin

4 VIN IC power supply pin

5 VOUT Output voltage pin

“H” : Power-on (normal operation) “L” : Power-off (standby) 6 4 1 3 2 SOT-23-6 Top view Table 3 SOT-23-6 Pin No. Symbol Description

1 OFF/ON

“H” : Power-on (normal operation) “L” : Power-off (standby)

2 VOUT Output voltage pin

3 VIN IC power supply pin

4 CONT External inductor connection pin

5 VSS GND pin

6 FB Output voltage feedback pin

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series  Absolute Maximum Ratings Table 4 Absolute Maximum Ratings (Ta = +25°C, VSS = 0 V unless otherwise specified) Item Symbol Abso lute Maximum Ratings Unit VIN pin voltage V IN V SS−0.3 to VSS+5.0 V VOUT pin voltage V OUT V SS−0.3 to VSS+6.0 V FB pin voltage V FB V SS−0.3 to VOUT+0.3 V CONT pin voltage V CONT V SS−0.3 to VSS+6.0 V OFFON/ pin voltage OFF/ONV VSS−0.3 to VIN+0.3 V Power Dissipation SNT-6A PD 400*1 mW SOT-23-6 650*1 mW Operating ambient temperature T opr −40 to +85 °C Storage temperature T stg −40 to +125 °C *1. When mounted on board [Mounted board] (1) Board size : 114.3 mm × 76.2 mm × t1.6 mm (2) Name : JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefor e not be exceeded under any conditions. 0 50 100 150 400 200 Power Dissipation (PD) [mW] Ambient Temperature (Ta) [°C] 700 300 100 SNT-6A SOT-23-6500 600 Figure 4 Package Power Dissipation (When Mounted on Board)

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01  Electrical Characteristics Table 5 Electrical Characteristics (VIN = 1.8 V, VOUT = 3.3 V, Ta = +25°C unless otherwise specified) Item Symbol Conditions Min. Typ. Max. Unit Test Circuit Operating start voltage *1 VST IOUT = 1 mA, VOUT(S)*2 = 3.3 V ⎯ ⎯ 0.9 V 2 Operating input voltage V IN ⎯ ⎯ ⎯ 4.5 V 2 Output voltage range V OUT(R) ⎯ 1.8 ⎯ 5.0 V 2 FB voltage V FB ⎯ 0.585 0.600 0.615 V 1 FB voltage temperature coefficient ΔVFB ΔTa Ta = −40°C to +85°C ⎯ ±100 ⎯ ppm/ °C1 FB pin input current I FB V OUT = 1.8 V to 5.5 V, FB pin −0.1 ⎯ ＋0.1 μA 1 Current consumption during operation IIN1 During switching, at no load VFB = VFB(S)*3 × 0.95 ⎯ 6 15 μA 1 ISS1 ⎯ 450 650 μA 1 Current consumption during switching off IIN2 During switching stop VFB = VFB(S)× 1.1 ⎯ 6 15 μA 1 ISS2 ⎯ 95 150 μA 1 Current consumption during power-off ISSS OFF/ONV = 0 V, VIN = VOUT = 4.5 V ⎯ ⎯ 3.0 μA 1 Oscillation frequency f OSC ⎯ 1.0 1.2 1.4 MHz 2 Maximum duty ratio MaxDuty V FB = VFB(S) × 0.95 82 88 94 % 2 PWM / PFM switching duty ratio PFMDuty ⎯ ⎯ 13 ⎯ % 2 Power MOS FET ON resistance *4 RNFET ⎯ ⎯ 0.25 ⎯ Ω 1 Power MOS FET leakage current I LSW OFF/ONV = 0 V ⎯ 0.01 0.5 μA 1 Limited current I LIM ⎯ 0.9 1.1 1.3 A 3 High level input voltage V SH VIN = 1.8 V to 4.5 V, OFFON/ pin 0.75 ⎯ ⎯ V 1 Low level input voltage V SL VIN = 1.8 V to 4.5 V, OFFON/ pin ⎯ ⎯ 0.25 V 1 High level input current I SH VIN = 1.8 V to 4.5 V, OFFON/ pin −0.1 ⎯ 0.1 μA 1 Low level input current I SL VIN = 1.8 V to 4.5 V, OFFON/ pin −0.1 ⎯ 0.1 μA 1 Soft-start time*5 tSS ⎯ 0.6 1.2 1.8 ms 2 *1. This is the guaranteed value measured with external parts shown in “ Table 6 External Parts List ” and with test circuits shown in Figure 6. The operating start voltage varies largely depending on diode’s forward voltage. Perform sufficient evaluation with actual application. *2. VOUT(S) can be set by the ratio of V FB value and the output voltage setting resistors (R FB1, RFB2). For details, refer to “ External Parts Selection ”. *3. VFB(S) is a setting value for FB voltage. *4. Power MOS FET ON resistance largely varies depending on the V OUT voltage. *5. This is when the V OUT voltage startups from the ST U release voltage or more. The soft-start time largely varies depending on the load current and the input voltage when the S-8363 Series startups from the STU release voltage or less, because the S-8363 Series onc e enters the start-up mode. Refer to “  2. Low voltage start-up ” for STU release voltage.  External Parts List When M easuring Electrical Characteristics Table 6 External Parts List Element name Symbol Constants Manufacturer Part number Inductor L 2.2 μH TDK Corporation VLF302510 Diode SD － TOSHIBA CORPORATION CRS08 Input capacitor C IN 1 μF TAIYO YUDEN Co., Ltd. EMK107B7105KA Output capacitor C OUT 10 μF TAIYO YUDEN Co., Ltd. LMK212BJ106KD FB pin capacitor C FB 47 pF TAIYO YUDEN Co., Ltd. UMK105CH470JV Output voltage setting resistor 1 R FB1 68 k Ω ROHM Co., Ltd. MCR03 series Output voltage setting resistor 2 R FB2 15 k Ω ROHM Co., Ltd. MCR03 series

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01  Operation 1. Switching control method The S-8363 Series switching regulator automatically switc hes between the pulse width modulation method (PWM) and pulse frequency modulation method (PFM) according to the load current. A low ripple power can be supplied by operating on PWM control for which the pulse width changes up to 88% in the range where the output load current is large. The S-8363 Series operates on PFM control when the out put load current is small and the pulses are skipped according to the amount of the load curr ent. Therefore, the oscillation circuit intermittently oscillates, reducing the self-current consumption. This preven ts decrease in efficiency when the output load current is small. The ripple voltage during the PFM control is very small, so that t he S-8363 Series realizes high efficiency and the low-noise power supply. The point at which PWM control switches to PFM control va ries depending on the external element (inductor, diode, etc.), input voltage value, and output voltage value, and this method achieves high effi ciency in the output load current of about 100 μA.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 2. 3 Schottky barrier diode A schottky barrier diode (SD) is necessary to operate the S-8363 Series. The VOUT pin also works as the power supply pin. The voltage applied on the VOUT pin when OFF/ON = “L” is V IN − VD. VD is forward voltage for step-down of SD, and largely varies depending on the forward current I f of SD and ambient temperature, but Vd is approx. 0.2 V to 0.5 V. When the S-8363 Series startups from 0. 9 V, use a SD with specially low V D. When using CRS08 for the S-8363 Series, start-up is guaranteed when Ta = +25°C and a load current of 1 mA. Satisfy the following conditions when using other SDs.

Low forward voltage (V
High switching speed
Reverse withstand voltage of V OUT + spike voltage or more
Rated current of I PK or more Table 7 Typical Schottky Diodes Manufacturer Name TOSHIBA CORPORATION CRS02 CRS08 ROHM Co., Ltd. RB161M-20TR RB051LA-40TR RB070M-30TR RB161SS-20T2R Remark Generally, in diodes with low forward volage V D, reverse leakage current I r tends to increases. Especially, increase of I r in high temperature is significant. To prevent decrease in efficiency, choose a diode with low Ir when low voltage start-up is unnecessary.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 3. Soft-start function The S-8363 Series has the built-in soft-start circuit. When power-on (connecting OFF/ON to V IN) or after start-up at OFF/ON = “H”, the output voltage (V OUT) gradually rises, suppressing rush current and overshoot of the output voltage. In the S-8363 Series, the soft-start time (t ss) is from start-up to the time to reach 90% of the VOUT output voltage setting value (V OUT(S)). A reference voltage adjustment me thod is adopted as the soft-start method, the reference voltage gradually rises from 0 V si multaneously with start of the soft-start. The soft-start circuit has two operation modes which is selected according to the V OUT voltage at start-up.

3.1 V OUT voltage at start-up > STU release voltage

The soft-start starts when the reference voltage gradually rises after OFF/ON = “H”. Reference voltage from error amplifier Soft-start time (tss) Time [s] 0 V 0 V VOUT × 0.90 0 V Output voltage (VOUT) Input voltage (VIN) Soft-start period ON/OFF voltage STU release 0 V Figure 10

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 3. 2 V OUT voltage at start-up < STU release voltage After OFF/ON =“H”, step-up starts by the start-up operation. When the V OUT voltage reaches the STU release voltage, the soft-start starts. Since the length of the start-up period largely varies dep ending on the input voltage, load current, external parts and ambient temperature, the so ft-start time varies according to them. Perform sufficient evaluation with actual application. Reference voltage from error amplifier Soft-start time (t ss) Time [s] 0 V 0 V VOUT × 0.90 0 V Output voltage (VOUT) Input voltage (VIN) Soft-start period ON/OFF voltage Start-up period STU release 0 V Figure 11

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 3. 3 Condition of performing soft-start again The condition to reset after the reference voltage once rises (reference voltage from error amplifier = 0 V) is to set the OFF/ON pin voltage to “L”. Setting OFF/ON = “H” starts soft-start again. When the V OUT voltage drops and decreases more than the STU detection voltage by an overload , the soft-start circuit shifts to the start-up period. When the VOUT voltage is restored by releasing overlo ad, the soft-start function is performed. If the V OUT voltage is not decreased less than the STU detection voltage, the soft-start function is not performed when restoration. Reference voltage from error amplifier 0 V 0 V Output voltage(VOUT) ON/OFF voltage Time [s] 0 V STU release STU detection <1> Start-up period <2> Soft-start period <3> Normal operation period <4> Reset period 0 A Load current (IOUT) VOUT(S) Figure 12 Reset Condition for Soft-Start

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 4. Power-off pin This pin stops or starts step-up operations. When the OFF/ON pin is set to the low level, the internal driver of the CONT pin is turned off and all internal circuits stop substantially reducing the current consumption. The OFF/ON pin is set up as shown in Figure 13 and is internally pulled down by using the depression transistor, so all circuits stop even if this pin is floating. Do not apply a voltage of between 0.25 V and 0.75 V to the OFF/ON pin because applying such a voltage in creases the current consumption. If the OFF/ON pin is not used, connect it to the VIN pin. Table 8 OFFON/ pin CR oscillation circuit Output voltage “H” Operates Set value “L” Stops V IN − VD VIN ON/OFF VSS VIN Figure 13 5. Current limit circuit A current limit circuit is built in the S-8363 Series. The current limit circuit monitors the current that flow s in the Nch power MOS FET and limits current in order to prevent thermal destructi on of the IC due to an overload or ma gnetic saturation of the inductor. When a current exceeding the current limit detection val ue flows in the Nch power MOS FET, the current limit circuit operates and turns off the Nch power MOS FET sinc e the current limit detection until one clock of the oscillator ends. The Nch power MOS FET is turned on in the next clock and the current limit circuit resumes current detection operation. If the val ue of the current that flows in the Nch power MOS FET remains the current limit detection value or more, the current limit circuit f unctions again and the same operation is repeated. Once the value of the current that flows in the Nch power MO S FET is lowered up to the specified value, the normal operation status restores. The current limit detection value is fixed to 1.1 A (typ.) in the IC. However, under the condition that ON duty is small, between the detection delay time of the current limit circuit and the ON time of the Nch power MOS FET, the difference is small. Therefore, t he current value which is actually limited is increased. Usually, when the difference between the VIN pin and VOUT pin is small, on duty is decreased and the limited current value is increased.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series  Operation Principles The S-8363 Series is a step-up switching regulator. Figure 14 shows the basic circuit diagram. Step-up switching regulators start cu rrent supply by the input voltage (V IN) when the Nch power MOS FET is turned on and holds energy in the inductor at the same ti me. When the Nch power MOS FET is turned off, the CONT pin voltage is stepped up to discharge the energy held in the inductor and the current is discharged to V OUT through the diode. When the discharged current is stored in C OUT, a voltage is generated, and the potential of V OUT increases until the voltage of the FB pin reaches the same potential as the internal reference voltage. For the PWM control method, the switching frequency (f OSC) is fixed and the V OUT voltage is held constant according to the ratio of the ON ti me and OFF time (ON duty) of the Nch power MOS FET in each period. In the PWM control method, the V OUT voltage is held constant by controlling the ON time. In the PFM control method, the Nch power MOS FET is tu rned on by fixed duty. When energy is discharged to V OUT once and the V OUT potential exceeds the set value, the Nch powe r MOS FET stays in the off status until V OUT decreases to the set value or less due to the load discharge. Time V OUT decreases to the set value or less depends on the amount of load current, so, the switchi ng frequency varies depending on this current. VSS FB CONT COUT RL VOUTSD IOUT I2 VIN L Nch power MOS FET Figure 14 Basic Circuit of Step-up Switching Regulator The ON duty in the current continuous mode can be calcul ated by using the equation below. Use the S-8363 Series in the range where the ON duty is less than the maximum duty. The maximum duty is 88% (typ.). ON duty = ()1 − VIN VOUT + VD*1 × 100 [%] *1. VD : Forward voltage of diode

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 1. Continuous current mode The following explains the current that flows into the in ductor when the step-up operation stabilizes in a certain status and IOUT is sufficiently large. When the Nch power MOS FET is turned on, current (I 1) flows in the direction shown in Figure 14 . The inductor current (I L) at this time gradually increases in proportion with the ON time (t ON) of the Nch power MOS FET, as shown in Figure 15. Current change of inductor within t ON : ΔIL(ON) = I L max. − IL min. VIN L × tON When the Nch power MOS FET is turned off, the vo ltage of the CONT pi n is stepped up to V OUT + V D and the voltage on both ends of the inductor becomes V OUT + VD − VIN. However, it is assumed here that V OUT >> VD and VD is ignored. Current change of inductor within t OFF : ΔIL(OFF) = VOUT − VIN L × tOFF The input power equals the output power in an idea l situation where there is no loss by components. IIN(AV) : PIN = POUT IIN(AV) × VIN = IOUT × VOUT ∴IIN(AV) = VOUT VIN The current that flows in the inductor consists of a ripple current that changes due to variation over time and a direct current. From Figure 15 : IIN(AV) : IIN(AV) = I IN(DC) + ΔIL = I IN(DC) + VOUT − VIN 2 × L × tOFF = I IN(DC) + VIN 2 × L Above, the continuous mode is the operation mode when I IN(DC) > 0 as shown in Figure 15 and the inductor current continuously flows. While the output current (I OUT) continues to decrease, I IN(DC) reaches 0 as shown in Figure 16 . This point is the critical point of the continuous mode. As shown in equations (1) and (2), the direct current component (I IN(DC)) depends on IOUT. IOUT(0) when IIN(DC) reaches 0 (critical point) : IOUT(0) = tON × VIN2 2 × L × VOUT When the output current decreases below I OUT(0), the current flowing in the inductor stops flowing in the t OFF period as shown in Figure 17. This is the discontinuous mode.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01  External Parts Selection 1. Inductor The recommended L value of the S-8363 Series is 2.2 μH. Caution When selecting an inductor, be careful about its allowable current. If a current exceeding the allowable current flows through the inductor, magnetic saturation occurs, substantially lowering the efficiency and destroying ICs due to large current. Therefore, select an inductor such that I PK does not exceed the allowable current. The following equations express I PK in the ideal statuses in the discontinuous and continuous modes : IPK = 2 × IOUT × (VOUT + VD*2 − VIN) fOSC*1 × L (Discontinuous mode) IPK = VOUT + VD*2 VIN × IOUT + (VOUT + VD*2 − VIN) × VIN 2 × (VOUT + VD*2) × fOSC*1 × L (Continuous mode) *1. fOSC : oscillation frequency *2. VD is the forward voltage of a dio de. The reference value is 0.4 V. However, current exceeding the above equation flows because conditions are practically not ideal. Perform sufficient evaluation with actual application. Table 9 Typical Inductors Manufacturer Name L value Direct resistor Rated current Size (L × W × H）[mm] TDK Corporation Murata Manufacturing Co., Ltd. TAIYO YUDEN Co., Ltd.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 2. Diode Use an externally mounted that meets the following conditions.

Low forward voltage (Schottky barrier diode or similar types)
High switching speed
Reverse withstand voltage of V OUT + spike voltage or more
Rated current of I PK or more 3. Input capacitor (CIN) and output capacitor (C OUT) To improve efficiency, an input capacitor (C IN) lowers the power supply impedance and averages the input current. Select CIN according to the impedance of the power supply used. The recommended capacitance is 1 μF or more for the S-8363 Series. An output capacitor (C OUT), which is used to smooth t he output voltage, requires a capac itance larger than that of the step-down type because the current is intermittently s upplied from the input to the output side in the step-up type. When the output voltage is low or the load current is large, enlarging an output capacitance value is required. Moreover, when the output voltage is high, connecting a 0.1 μF ceramic capacitor in parallel is required. Mount near a VOUT pin as possible. The indication of an output capacitor to the setting value of V OUT voltage is shown in the table 10. Perform thorough evaluation using an actual application to set the constant when selecting parts. A ceramic capacitor can be used for both the input and output. Table 10 Recommended Output Capacitance V OUT voltage Output capacitor (C OUT) < 2.5 V 10 μF × 2 2.5 V to 4.0 V 10 μF 4.0 V < 10 μF + 0.1 μF

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 4. Output voltage setting resistors (R FB1, RFB2), capacitor for phase compensation (C FB) For the S-8363 Series, V OUT can be set to any value by using external divider resistors. Connect the divider resistors between the VOUT and VSS pins. Because V FB = 0.6 V typ., VOUT can be calculated by using the following equation : V OUT = RFB1 + RFB2 RFB2 × 0.6 Connect divider resistors R FB1 and RFB2 as close to the IC as possible to minimize the effects of noise. If noise has an effect, adjust the values of R FB1 and RFB2 so that RFB1 + RFB2 < 100 kΩ. CFB, which is connected in parallel with R FB1, is a capacitor for phase compensation. By setting the zero point (the phase feedback) by adding capacitor C FB to output voltage setting resistor R FB1 in parallel, the phase margin increases, improving the stabi lity of the feedback loop. To effectively use the feedback portion of the phase based on the zero point, define C FB by using the following equation : C FB ≅ L × COUT 3 × RFB1 VOUT VDD This equation is only a guide. The following explains the optimum setting. To efficiently use the feedback portion of the phase bas ed on the zero point, specify settings so that the phase feeds back at the zero point frequency (f zero) of R FB1 and C FB according to the phase delay at the pole frequency (fpole) of L and COUT. The zero point frequency is generally set slightly higher than the pole frequency. The following equations are used to determine the pole frequency of L and C OUT and the zero point frequency set using RFB1 and CFB. fpole ≅ 2 × π × L × COUT VDD VOUT f zero ≅ 2 × π × RFB1 × CFB The transient response can be improved by setting the zero point frequency in a lower frequency range. If, however, the zero point frequency is set in a significantly lower ran ge, the gain increases in t he range of high frequency and the phase margin decreases. This might result in unstab le operation. Determine the proper value after sufficient evaluation with actual application. The typical constants based on our evaluation are shown in Table 11. Table 11 Example of Constant for External Parts VOUT(S) [V] V IN [V] R FB1 [kΩ] R FB2 [kΩ] C FB [pF] 1.8 1.2 30 15 82 2.48 1.2 47 15 68 3.32 1.8 68 15 47 4.2 1.8 90 15 39 5.0 1.8 110 15 39

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series  Standard Circuit Error Amplifier CIN VIN VOUT VOUT CONT VSS VIN ON/OFF Internal Power Supply ON/OFF Circuit Switching Control Circuit Reference Voltage Source PWM Comparator VIN Σ VOUT SD − FB Current Limit Circuit Oscillation Circuit SLOPE Compensation STU Mode Circuit MUX + Start-up Circuit L = 2.2 μH COUT 10 μF Ground point CFB COUT 0.1 μF RFB1 RFB2 Figure 18 Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using an actual application to set the constants.  Precaution

Mount external capacitors and inductor as close as possible to the IC. Set single point ground.
Characteristics ripple voltage and spike noise occur in IC containing switching regulators. Moreover rush current flows at the time of a power supply injection. Because these largely depend on the inductor, the capacitor and impedance of power supply used, perform sufficient evaluation with actual application.
The 0.1 μF capacitor connected between the VOUT and VSS pins is a bypass capacitor. It stabilizes the power supply in the IC when application is used with a heav y load, and thus effectively works for stable switching regulator operation. Allocate the bypass capacitor as clos e to the IC as possible, prioritized over other parts.
Although the IC contains a static elec tricity protection circuit, static electricit y or voltage that exceeds the limit of the protection circuit should not be applied.
The power dissipation of the IC greatly varies dependin g on the size and material of the board to be connected. Perform sufficient evaluation using an actual application before designing.
SII Semiconductor Corporation claims no responsibility for any disputes arising out of or in connection with any infringement by products including this IC of patents owned by a third party.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01  Application Circuits Application circuits are examples. They may always not guarantee successful operation. 1. External parts for application circuits Table 12 Characteristics of External Parts Part Part Name Manfuacturer Characteristics Inductor VLF302510 TDK Corporation 2.2 μH, DCR*1 = 0.084 Ω, IMAX*2 = 1.23 A, VLS201610E 2.2 μH, DCR*1 = 0.276 Ω, IMAX*2 = 0.94 A, MLP2012S 2.2 μH, DCR*1 = 0.300 Ω, IMAX*2 = 0.8 A, Diode CRS02 TOSHIBA CORPORATION VF*3 = 0.4 V typ., IF*4 = 1.0 A, VR*5 = 30 V, CRS08 VF*3 = 0.32 V typ., IF*4 = 1.5 A, VR*5 = 30 V, RB070M-30TR ROHM Co., Ltd. VF*3 = 0.44 V typ., IF*4 = 1.5 A, VR*5 = 30 V, VF*3 = 0.35 V max., IF*4 = 3.0 A, VR*5 = 20 V, L × W × H = 4.7 × 2.6 × 1.05 mm RB051LA-40TR RB161M-20TR VF*3 = 0.31 V typ., IF*4 = 1.0 A, VR*5 = 20 V, L × W × H = 1.6 × 0.8 × 0.603 mm RB161SS-20T2R Capacitor LMK212BJ106KD TAIYO YUDEN Co., Ltd. 10 μF, EDC*6 = 10 V, X5R, L × W × H = 2.0 × 1.25 × 0.95 mm EMK107B7105KA 10 μF, EDC*6 = 16 V, X7R, C1608X5R0J106M TDK Corporation 10 μF, EDC*6 = 6.3 V, X5R, C1608X7R1C105K 1 μF, EDC*6 = 16 V, X7R, * 1. DCR : DC resistance * 2. IMAX : Maximum allowable current * 3. VF : Forward voltage * 4. IF : Forward current * 5. VR : Reverse voltage * 6. EDC : Rated voltage

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 2. A power supply started by 0.9 V Following shows a power supply example which starts up by using the final voltage (0.9 V) of dry cells and its characteristics. L S-8363 Series VDD VSS ON/OFF FB COUT RFB1 RFB2 CFB VOUT CIN SD CONTVOUT 0.1 μF Figure 19 Circuit Example (For a power supply started by 0.9 V) Table 13 External Parts Examples (For a power supply started by 0.9 V) Condition Output Voltage IC Product Name L Product Name SD Product Name COUT Product Name R FB1 R FB2 C FB 1 3.3 V S-8363B VLF302510 RB161M-20TR LMK212BJ106KD 68 k Ω 15 k Ω 47 pF 2 3.3 V S-8363B VLF302510 RB051LA-40TR LMK212BJ106KD 68 k Ω 15 k Ω 47 pF 3 3.3 V S-8363B VLF302510 RB070M-30TR LMK212BJ106KD 68 k Ω 15 k Ω 47 pF 4 3.3 V S-8363B VLF302510 RB161SS-20T2R LMK212BJ106KD 68 k Ω 15 k Ω 47 pF 5 3.3 V S-8363B VLF302510 CRS02 LMK212BJ106KD 68 k Ω 15 k Ω 47 pF 6 3.3 V S-8363B VLF302510 CRS08 LMK212BJ106KD 68 k Ω 15 k Ω 47 pF Caution The above connection will not guarantee successful operation. Perform thor ough evaluation using an actual application to set the constant.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 3. Output characteristics of power supply started by 0.9 V Following shows the (1) Load current (I OUT) vs. Operating start voltage (V ST), (2) Temperature (Ta) vs. Operating start voltage (V ST), (3) Load current (I OUT) vs. Efficiency ( η), (4) Load current (I OUT) vs. Output voltage (V OUT), characteristics for conditions 1 to 6 in Table 13. (1) Load current (I OUT) vs. Operating start voltage (V ST) (2) Temperature (Ta) vs. Operating start voltage (V ST) 101 100 1.80 1.60 1.40 1.20 1.00 0.80 0.60 0.40 0.20

0.00 VST [V]

IOUT [mA] Condition 3 Condition 5 Condition 6 Condition 2 Condition 4 Condition 1 0.4 1.1 Ta [C] −40 0.5 0.6 0.7 0.8 0.9 1.0 VST [V] 857550250−25 Condition 1 Condition 4 Condition 2 Condition 5 Condition 3 Condition 6 (3) Load current (IOUT) vs. Efficiency (η) (4) Load current (I OUT) vs. Output voltage (V OUT) 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] Condition 2 Condition 3 Condition 1 Condition 4 Condition 6 Condition 5 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] Condition 4 Condition 5 Condition 2 Condition 6 Condition 3 Condition 1

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 4. Super-small power supply Following shows a circuit example which gives top priori ty to reduce the implementation area by using the small external parts and its characteristics. L S-8363 Series VDD VSS ON/OFF FB COUT1 RFB1 RFB2 CFB VOUT CIN SD CONTVOUT COUT2 Figure 20 Circuit Example (For super-small power supply) Table 14 External Parts Examples (For super-small power supply) Condition Output Voltage IC Product Name L Product Name SD Product Name COUT1 C OUT2 R FB1 R FB2 C FB 1 1.8 V S-8363B MLP2012S RB161SS-20 C1608X5R0J106M C1608X5R0J106M 30 kΩ 15 k Ω 82 pF 2 3.3 V S-8363B MLP2012S RB161SS-20 LMK212BJ106KD 0.1 μF 68 kΩ 15 k Ω 47 pF 3 1.8 V S-8363B VLS201610E RB161SS-20 C1608X5R0J106M C1608X5R0J106M 30 kΩ 15 k Ω 82 pF 4 3.3 V S-8363B VLS201610E RB161SS-20 LMK212BJ106KD 0.1 μF 68 kΩ 15 k Ω 47 pF 5 1.8 V S-8363B BRL2518T2R2M RB161SS-20 C1608X5R0J106M C1608X5R0J106M 30 kΩ 15 k Ω 82 pF 6 3.3 V S-8363B BRL2518T2R2M RB161SS-20 LMK212BJ106KD 0.1 μF 68 kΩ 15 k Ω 47 pF Caution The above connection will not guarantee successful operation. Perform thor ough evaluation using an actual application to set the constant.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 5. Output characteristics of super-small power supply Following shows the output current (I OUT) vs. efficiency (η), output current (I OUT) vs. output voltage (V OUT), and output current (IOUT) vs. ripple voltage (V r) characteristics for conditions 1 to 6 in Table 14. Condition 1 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 1000 1.90 1.70 1.80 1.84 1.86 1.76 1.72 1.74 1.78 1.82 1.88 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V Condition 2 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 1.2 V VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 1.2 V VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 3.0 V VIN = 2.4 V VIN = 1.8 V VIN = 1.2 V

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series Condition 3 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 1.2 V VIN = 0.9 V VIN = 1.5 V 0.01 1000 1.90 1.70 1.80 1.84 1.86 1.76 1.72 1.74 1.78 1.82 1.88 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V Condition 4 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 1.2 V VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 1.2 V VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 3.0 V VIN = 2.4 V VIN = 1.8 V VIN = 1.2 V

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 Condition 5 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V 0.01 1000 1.90 1.70 1.80 1.84 1.86 1.76 1.72 1.74 1.78 1.82 1.88 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V Condition 6 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 2.5 V VIN = 1.8 V VIN = 1.2 V VIN = 0.9 V

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series  Characteristics (Typical Data) 1. Examples of Major Power Supply Dependence Characteristics (Ta = +25°C) (1) Current consumption during operation (I IN1) vs. Operating input voltage (V IN) Current consumption during switching off (I IN2) vs. Operating input voltage (V IN) (2) Current consumption during operation (I SS1) vs. Output voltage (VOUT) Current consumption during switching off (I SS2) vs. Output voltage (VOUT) VIN [V] IIN1, IIN2 [μA] IIN1, IIN2 VOUT [V] ISS1, ISS2 [μA] 1000 500 700 800 300 100 200 400 600 900 ISS1 ISS2 (3) Current consumption during powe r-off (ISSS) vs. Operating input voltage (V IN), Output voltage (V OUT) VIN, VOUT [V] ISSS [μA] 1.0 0.5 0.7 0.8 0.3 0.1 0.2 0.4 0.6 0.9 (4) Oscillation frequency ( fOSC) vs. Output voltage (VOUT) (5) Start-up oscillation frequency ( fST) vs. Operating input voltage (V IN) 1.38 1.02 1.34 1.30 1.26 1.22 1.18 1.14 1.10 1.06 VOUT [V] fosc [MHz] VIN [V] fST [kHz] 500 450 400 350 300 250 200 150 100 (6) Maximum duty ratio (MaxDuty) vs. Output voltage (V OUT) (7) Soft-start time (t SS) vs. Output voltage ( VOUT) 100 VOUT [V] MaxDuty [%] 1.5 1.4 1.3 1.2 1.1 1.0 0.9 VOUT [V] tSS [ms]

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 (8) PWM / PFM switching duty ratio (PFMDuty) vs. Operating input voltage (V IN) (9) Output current at PWM / PFM switching (I PFM) vs. Operating input voltage (V IN) VIN [V] PFMDuty [%] VOUT = 1.8 V VOUT = 3.32 V VOUT = 5.0 V VIN [V] IPFM [mA] VOUT = 1.8 V VOUT = 3.32 V VOUT = 5.0 V (10) Limited current (I LIM) vs. Operating input voltage (V IN) (11) Maximum load current (I OUTMAX) vs. Operating input voltage (V IN) 1600 1400 1200 1000 800 600 400 VIN [V] ILIM [mA] VOUT = 1.8 V VOUT = 3.32 V VOUT = 5.0 V VIN [V] IOUTMAX [mA] 1000 500 700 800 300 100 200 400 600 900 VOUT = 1.8 V VOUT = 3.32 V VOUT = 5.0 V (12) Power MOS FET leakage current (I LSW) vs. O u t p u t v o l t a g e ( VOUT) (13) High level input voltage (V SH) vs. Operating input voltage (V IN) 0.5 0.4 0.3 0.2 0.1 0.0 VOUT [V] ILSW [μA] 0.8 0.7 0.6 0.5 0.4 0.3 VSH [V] VIN [V] (14) Low level input voltage (V SL) vs. Operating input voltage (V IN) (15) FB voltage (VFB) vs. Output voltage (V OUT) 0.9 0.8 0.7 0.6 0.5 0.4 0.3 VIN [V] VSL [V] 0.63 0.62 0.61 0.60 0.59 0.58 0.57 VOUT [V] VFB [V]

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 2. Examples of Major Temperature Characteristics (Ta = −40 to +85°C) (1) Current consumption during operation (I IN1) vs. Temperature (Ta) (2) Current consumption during operation (I SS1) vs. Temperature (Ta) Ta [C] −40 IIN1 [μA] 10.0 0.0 5.0 7.0 8.0 3.0 1.0 2.0 4.0 6.0 9.0 857550250−25 VIN = 0.9 V VIN = 1.8 V VIN = 4.2 V VIN = 4.5 V Ta [C] −40 ISS1 [μA] 1000 500 700 800 300 100 200 400 600 900 857550250−25 VOUT = 5.0 V VOUT = 3.3 V VOUT = 1.8 V (3) Current consumption during switching off (I IN2) vs. Temperature (Ta) (4) Current consumption during switching off (I SS2) vs. Temperature (Ta) Ta [C] −40 IIN2 [μA] 10.0 0.0 5.0 7.0 8.0 3.0 1.0 2.0 4.0 6.0 9.0 857550250−25 VIN = 0.9 V VIN = 1.8 V VIN = 4.2 V VIN = 4.5 V Ta [C] −40 ISS2 [μA] 200 100 140 160 120 180 857550250−25 VOUT = 1.8 V VOUT = 3.3 V VOUT = 5.0 V (5) Current consumption during power-off (I SSS) vs. Temperature (Ta) Ta [C] −40 ISSS [μA] 1.0 0.0 0.5 0.7 0.8 0.3 0.1 0.2 0.4 0.6 0.9 857550250−25 VIN = VOUT = 4.5 V (6) Oscillation frequency (f OSC) vs. Temperature (Ta) (7) St art-up oscillation frequency (fST) vs. Temperature (Ta) Ta [C] −40 1.38 1.02 1.34 1.30 1.26 1.22 1.18 1.14 1.10 1.06 fosc [MHz] 857550250−25 VOUT = 1.8 V VOUT = 3.3 V VOUT = 5.0 V Ta [C] −40 fST [kHz] 500 450 400 350 300 250 200 150 100 857550250−25 VIN = 0.9 V

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 (8) Maximum duty ratio (MaxDuty) vs. Te mperature (Ta) (9) Soft-start time (t SS) vs. Temperature (Ta) Ta [C] −40 100 MaxDuty [%] 857550250−25 VOUT = 1.8 V VOUT = 3.3 V VOUT = 5.0 V Ta [C] −40 1.6 0.6 1.1 1.3 1.4 0.9 0.7 0.8 1.0 1.2 1.5 tSS [ms] 857550250−25 VOUT = 1.8 V VOUT = 3.3 V VOUT = 5.0 V (10) PWM / PFM switching duty ratio (PFMDuty) vs. Temperature (Ta) (11) Output current at PWM / PFM switching (I PFM) vs. Temperature (Ta) Ta [C] −40 PFMDuty [%] 857550250−25 VOUT = 1.8 V, VIN = 1.2 V VOUT = 3.32 V, VIN = 1.8 V VOUT = 5.0 V, VIN = 3.0 V Ta [C] −40 IPFM [mA] 857550250−25 VOUT = 5.0 V, VIN = 3.0 V VOUT = 3.32 V, VIN = 1.8 V VOUT = 1.8 V, VIN = 1.2 V (12) Limited current (I LIM) vs. Temperature (Ta) (13) Maximum load current (I OUTMAX) vs. Temperature (Ta) Ta [C] −40 1600 1400 1200 1000 800 600 400 ILIM [mA] 857550250−25 VOUT = 3.32 V, VIN = 1.8 V VOUT = 1.8 V, VIN = 1.2 V VOUT = 5.0 V, VIN = 3.0 V Ta [C] −40 1000 500 700 800 300 100 200 400 600 900 IOUTMAX [mA] 857550250−25 VOUT = 3.32 V, VIN = 1.8 V VOUT = 1.8 V, VIN = 1.2 V VOUT = 5.0 V, VIN = 3.0 V (14) Power MOS FET leakage current (I LSW) vs. Temperature (Ta) (15) High level input voltage (V SH) vs. Temperature (Ta) Ta [C] −40 0.5 −0.5 0.0 0.2 0.3 −0.2 −0.4 −0.3 −0.1 0.1 0.4 ILSW [μA] 857550250−25 VOUT = 1.8 V VOUT = 3.3 V VOUT = 5.0 V Ta [C] −40 0.60 0.55 0.50 0.45 0.40 0.35

0.30 VSH [V]

857550250−25 VIN = 1.8 V VIN = 0.9 V VIN = 4.5 V VIN = 4.2 V

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series (16) Low level input voltage (V SL) vs Temperature (Ta) (17) FB voltage (V FB) vs. Temperature (Ta) Ta [C] −40 0.60 0.55 0.50 0.45 0.40 0.35

0.30 VSL [V]

857550250−25 VIN = 0.9 V VIN = 1.8 V VIN = 4.2 V VIN = 4.5 V Ta [C] −40 0.63 0.62 0.61 0.60 0.59 0.58

0.57 VFB [V]

857550250−25 VOUT = 3.3 V (18) Operating start voltage (V ST) vs. Temperature (Ta) (19) Start-up mode release voltage (V STU+) vs. Temperature (Ta) Ta [C] −40 1.2 1.0 0.8 0.6 0.4 0.2 0.0 VST [V] 857550250−25 IOUT = 10 mA IOUT = 1 mA IOUT = 0.1 mA Ta [C] −40 VSTU+ [V] 1.6 1.1 1.5 1.4 1.3 1.2 857550250−25

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 3. Output waveform (1) V OUT = 3.3 V（VIN = 1.98 V） IOUT = 1 mA I OUT = 10 mA 3.26 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 t [2 μs / div] 3.0 3.8 VOUT [V] VCONT [V] 3.1 3.2 3.3 3.4 3.5 3.6 3.7 VOUT VCONT 3.26 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.0 3.8 VOUT [V] 3.1 3.2 3.3 3.4 3.5 3.6 3.7 t [1 μs / div] VCONT [V] VOUT VCONT IOUT = 100 mA I OUT = 300 mA 3.26 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.8 VOUT [V] 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.0 t [1 μs / div] VCONT [V] VOUT VCONT 3.26 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.8 VOUT [V] 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.0 t [1 μs / div] VCONT [V] VOUT VCONT (2) V OUT = 5.0 V（VIN = 3.0 V） IOUT = 1 mA I OUT = 10 mA VOUT [V] 5.04 4.90 5.02 5.00 4.98 4.96 4.94 4.92 12.0 −2.0 10.0 8.0 6.0 4.0 2.0 0.0 t [2 μs / div] VCONT [V] VOUT VCONT VOUT [V] 5.04 4.90 5.02 5.00 4.98 4.96 4.94 4.92 12.0 −2.0 10.0 8.0 6.0 4.0 2.0 0.0 t [1 μs / div] VCONT [V] VOUT VCONT IOUT = 100 mA I OUT = 300 mA VOUT [V] 5.04 4.90 5.02 5.00 4.98 4.96 4.94 4.92 12.0 −2.0 10.0 8.0 6.0 4.0 2.0 0.0 t [1 μs / div] VCONT [V] VOUT VCONT VOUT [V] 5.04 4.90 5.02 5.00 4.98 4.96 4.94 4.92 12.0 −2.0 10.0 8.0 6.0 4.0 2.0 0.0 t [1 μs / div] VCONT [V]VOUT VCONT

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 4. Examples of Transient Response Characteristics Unless otherwise specified, the used parts are those in Table 6 External Parts List . 4.1 At power-on (V OUT(S) = 3.3 V, VIN = 0 V → 0.9 V, Ta = +25°C) (1) I OUT = 1 mA 4.0 3.0 2.0 1.0 Time [μs] VIN, VOUT [V] VOUT VIN 4.2 At power-on (V OUT(S) = 3.3 V, VIN = 0 V → 2.0 V, Ta = +25°C) (1) I OUT = 1 mA (2) I OUT = 300 mA 4.0 3.0 2.0 1.0 Time [μs] VIN, VOUT [V] VOUT VIN 4.0 3.0 2.0 1.0 Time [μs] VIN, VOUT [V] VOUT VIN 4.3 Power-off pin response (V OUT = 3.3 V, VIN = 0.9 V, VON/OFF = 0 V → 0.9 V, Ta = +25°C) (1) I OUT = 1 mA 4.0 3.0 2.0 1.0 Time [μs] VON/OFF, VOUT [V] VOUT VON/OFF 4.4 Power-off pin response (V OUT = 3.3 V, VIN = 2.0 V, VON/OFF = 0 V → 2.0 V, Ta = +25°C) (1) I OUT = 1 mA (2) I OUT = 300 mA 4.0 3.0 2.0 1.0 Time [μs] VON/OFF, VOUT [V] VOUT VON/OFF 4.0 3.0 2.0 1.0 Time [μs] VON/OFF, VOUT [V] VOUT VON/OFF

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 4.5 Power supply voltage fluctuations (V OUT = 3.0 V, IOUT = 100 mA, Ta = +25°C) (1) V IN = 1.98 V→2.64 V (2) V IN = 2.64 V→1.98 V Time [μs] VOUT [V] 3.5 3.0 6.0 1.0 400−100 300 2001000 3.4 3.3 3.2 3.1 5.0 4.0 3.0 2.0 VIN [V] VOUT VIN Time [μs] VOUT [V] 3.5 3.0 6.0 1.0 400−100 300 2001000 3.4 3.3 3.2 3.1 5.0 4.0 3.0 2.0 VIN [V] VOUT VIN (1) I OUT = 0.1 mA→100 mA (2) I OUT = 100 mA→0.1 mA Time [μs] VOUT [V] 3.5 3.0 500 4003002001000−100−200 3.4 3.3 3.2 3.1 400 300 200 100 IOUT [mA] VOUT IOUT Time [μs] VOUT [V] 3.5 3.0 500 6−2 3.4 3.3 3.2 3.1 400 300 200 100 IOUT [mA] 420 VOUT IOUT 4.7 Load fluctuations (V OUT = 3.3 V, VIN = 1.98 V, IOUT = 100 mA → 200 mA → 100 mA, Ta = +25°C) (1) I OUT = 100 mA→200 mA (2) I OUT = 200 mA→100 mA Time [μs] VOUT [V] 3.5 3.0 500 400−100 300 2001000 3.4 3.3 3.2 3.1 400 300 200 100 IOUT [mA] VOUT IOUT Time [μs] VOUT [V] 3.5 3.0 500 400−100 300 2001000 3.4 3.3 3.2 3.1 400 300 200 100 IOUT [mA] VOUT IOUT

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series  Reference Data Reference data is provided to determine specific extern al components. Therefore, the following data shows the characteristics of the recommended external components selected for various applications. 1. External parts Table 15 Efficiency vs. Output Current Characteristics a nd Output Voltage vs. Output Current Characteristics for External Parts (1 / 2) Condition Product Name Output Voltage L Product Name SD Product Name CIN 1 S-8363B 1.8 V VLF302510 CRS08 C1608X7R1C105K 2 S-8363B 3.3 V VLF302510 CRS08 EMK107B7105KA 3 S-8363B 5.0 V VLF302510 CRS08 EMK107B7105KA 4 S-8363B 3.3 V VLF302510 CRS08 C1608X7R1C105K 5 S-8363B 3.3 V VLF302510 CRS08 C1608X7R1C105K 6 S-8363B 3.3 V VLF302510 RB070M-30TR EMK107B7105KA 7 S-8363B 3.3 V VLF302510 RB051LA-40TR EMK107B7105KA Table 15 Efficiency vs. Output Current Characteristics a nd Output Voltage vs. Output Current Characteristics for External Parts (2 / 2) Condition C OUT1 C OUT2 C OUT3 R FB1 R FB2 C FB

1 C1608X5R0J106M C1608X5R0J106M ⎯ 30 k Ω 15 k Ω 82 pF

2 LMK212BJ106KD 0.1 μF ⎯ 68 k Ω 15 k Ω 47 pF 3 LMK212BJ106KD 0.1 μF ⎯ 110 k Ω 15 k Ω 38 pF

4 C1608X5R0J106M C1608X5R0J106M ⎯ 68 k Ω 15 k Ω 47 pF

5 C1608X5R0J106M C1608X5R0J106M C1608X5R0J106M 68 k Ω 15 k Ω 47 pF

6 LMK212BJ106KD 0.1 μF ⎯ 68 k Ω 15 k Ω 47 pF 7 LMK212BJ106KD 0.1 μF ⎯ 68 k Ω 15 k Ω 47 pF

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 The properties of the external parts are shown below. Table 16 Characteristics of External Parts Part Part Name Manfuacturer Characteristics Inductor VLF302510 TDK Corporation 2.2 μH, DCR*1 = 0.084 Ω, IMAX*2 = 1.23 A, Diode CRS08 TOSHIBA CORPORATION VF*3 = 0.32 V typ., IF*4 = 1.5 A, VR*5 = 30 V, RB070M-30TR ROHM Co., Ltd. VF*3 = 0.44 V typ., IF*4 = 1.5 A, VR*5 = 30 V, RB051LA-40TR VF*3 = 0.35 V max., IF*4 = 3.0 A, VR*5 = 20 V, RB161M-20TR VF*3 = 0.31 V typ., IF*4 = 1.0 A, VR*5 = 20 V, RB161SS-20T2R VF*3 = 0.42 V, IF*4 = 1.0 A, VR*5 = 20 V, L × W × H = 1.6 × 0.8 × 0.603 mm Capacitor LMK212BJ106KD TAIYO YUDEN Co., Ltd. 10 μF, EDC*6 = 10 V, X5R, L × W × H = 2.0 × 1.25 × 0.95 mm EMK107B7105KA 10 μF, EDC*6 = 16 V, X7R, C1608X5R0J106M TDK Corporation 10 μF, EDC*6 = 6.3 V, X5R, C1608X7R1C105K 1 μF, EDC*6 = 16 V, X7R, * 1. DCR : DC resistance * 2. IMAX : Maximum allowable current * 3. VF : Forward voltage * 4. IF : Forward current * 5. VR : Reverse voltage * 6. EDC : Rated voltage Caution The values shown in the characteristics column of Table 16 above are based on the materials provided by each manufacture. However, consider the charact eristics of the original materials when using the above products.

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 2. Output Current (I OUT) vs. Efficiency (η) Characteristics, Output Current (I OUT) vs. Output Voltage (VOUT) Characteristics Following shows the actual output current (I OUT) vs. efficiency ( η) and output current (I OUT) vs. output voltage (V OUT) characteristics for conditions 1 to 7 in Table 15. Condition 1 S-8363B (V OUT(S) = 1.8 V) 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 1000 1.90 1.70 1.80 1.84 1.86 1.76 1.72 1.74 1.78 1.82 1.88 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V Condition 2 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V Condition 3 S-8363B (V OUT(S) = 5.0 V) 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V VIN = 4.2 V VIN = 4.5 V 0.01 1000 5.10 4.90 5.00 5.04 5.06 4.96 4.92 4.94 4.98 5.02 5.08 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V VIN = 4.5 V VIN = 4.2 V Condition 4 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 Condition 5 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V Condition 6 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V Condition 7 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 100 0.1 1 10 100 IOUT [mA] η [%] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V 0.01 1000 3.40 3.20 3.30 3.34 3.36 3.26 3.22 3.24 3.28 3.32 3.38 0.1 1 10 100 IOUT [mA] VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_01 S-8363 Series 3. Output Current (I OUT) vs. Ripple Voltage (Vr) Characteristics Following shows the actual output current (I OUT) vs. ripple voltage (V r) characteristics for conditions of 1 to 7 in Table 15. Condition 1 S-8363B (V OUT(S) = 1.8 V) Condition 2 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.8 V VIN = 2.5 V VIN = 0.9 V VIN = 1.2 V VIN = 3.0 V Condition 3 S-8363B (V OUT(S) = 5.0 V) Condition 4 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 3.0 V VIN = 2.4 VVIN = 4.5 V VIN = 4.2 V VIN = 1.8 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.8 V VIN = 1.2 VVIN = 3.0 V VIN = 2.5 V VIN = 0.9 V Condition 5 S-8363B (V OUT(S) = 3.3 V) Condition 6 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.8 V VIN = 1.2 VVIN = 3.0 V VIN = 2.5 V VIN = 0.9 V 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.8 V VIN = 1.2 VVIN = 3.0 V VIN = 2.5 V VIN = 0.9 V Condition 7 S-8363B (V OUT(S) = 3.3 V) 0.01 1000 0.1 1 10 100 IOUT [mA] Vr [mV] VIN = 1.8 V VIN = 1.2 VVIN = 3.0 V VIN = 2.5 V VIN = 0.9 V

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01  Marking Specification (1) SNT-6A SNT-6A Top view 3 4 (1) (4) (2) (5) (3) (6) (1) to (3) : Product code (Refer to Product name vs. Product code) (4) to (6) : Lot number Product name vs. Product code Product name Product code (1) (2) (3) S-8363B-I6T1U2 I 9 B (2) SOT-23-6 6 4 1 32 (1) (2) (3) (4) SOT-23-6 Top view (1) to (3) : Product code (Refer to Product name vs. Product code) (4) : Lot number Product name vs. Product code Product name Product code (1) (2) (3) S-8363B-M6T1U2 I 9 B Remark Please select products of environmental code = U for Sn 100%, halogen-free products.

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Disclaimers (Handling Precautions) 1. All the information described herei n (product data, specifications, figur es, tables, programs, algorithms and application circuit examples, etc.) is cu rrent as of publishing dat e of this document and is subject to change without notice. 2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of any specific mass-production design. SII Semiconductor Corporation is not responsible for damages caused by the reasons other than the products or infringement of third-party intellectual property rights and any other rights due to the use of the information described herein. 3. SII Semiconductor Corporation is not responsible for da mages caused by the incorrect information described herein. 4. Take care to use the products described herein within their specified ranges. Pay special attention to the absolute maximum ratings, operation voltage range and electrical characteristics, etc. SII Semiconductor Corporation is not re sponsible for damages caused by failu res and/or accidents, etc. that occur due to the use of products outside their specified ranges. 5. When using the products described herei n, confirm their applicatio ns, and the laws and regulat ions of the region or country where they are used and verify suitability, safety and other factors for the intended use. 6. When exporting the products described herein, comply with the Foreign Exchange and Foreign Trade Act and all other export-related laws, and follow the required procedures. 7. The products described herein must not be used or prov ided (exported) for the purposes of the development of weapons of mass destruction or militar y use. SII Semiconductor Corporation is not responsible for any provision (export) to those whose purpose is to develop, manufactur e, use or store nuclear, biol ogical or chemical weapons, missiles, or other military use. 8. The products described herein are not designed to be used as part of any device or equipment that may affect the human body, human life, or assets (such as medical equi pment, disaster prevention sy stems, security systems, combustion control systems, infrastructure control systems, vehicle equipment, traffic systems, in-vehicle equipment, aviation equipment, aerospace equipment, and nuclear-related equipment), excluding when specified for in-vehicle use or other uses. Do not use those products without the prior written permission of SII Semiconductor Corporation. Especially, the products described her ein cannot be used for life support dev ices, devices implanted in the human body and devices that directly affect human life, etc. Prior consultation with our sales office is required when considering the above uses. SII Semiconductor Corporation is not responsible for damages caused by unauthorized or unspecified use of our products. 9. Semiconductor products may fail or malfunction with some probability. The user of these products s hould therefore take responsibility to gi ve thorough consideration to safety design including redundancy, fire spread prevention measures, and malfunction prevention to prevent accidents causing injury or death, fires and social damage, etc. that may ensue from the products' failure or malfunction. The entire system must be sufficiently evaluated and applied on customer's own responsibility. 10. The products described herein are not designed to be radi ation-proof. The necessary radiation measures should be taken in the product design by the customer depending on the intended use. 11. The products described herein do not affect human health under normal use. However, they contain chemical substances and heavy metals and should therefore not be put in the mouth. The fracture surfaces of wafers and chips may be sharp. Take care when handling these with the bare hands to prevent injuries, etc. 12. When disposing of the products described herein, comply with the laws and ordinances of the country or region where they are used. 13. The information described herein contains copyright info rmation and know-how of SII Semiconductor Corporation. The information described herein does not convey any lic ense under any intellectual property rights or any other rights belonging to SII Semiconductor Corporation or a third party. Reproduction or copying of the information described herein for the purpose of disclosing it to a thir d-party without the express permission of SII Semiconductor Corporation is strictly prohibited. 14. For more details on the information de scribed herein, contact our sales office. 1.0-2016.01 www.sii-ic.com

Product Information

RB161SS-20T2R specifications and overview.

Summary

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM / PFM SWITCHABLE SWITCHING REGULATOR

Description

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM / PFM SWITCHABLE SWITCHING REGULATOR

Source title RB161SS-20T2R Datasheet(PDF) - Seiko Instruments Inc

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