RP505K NISSHINBO | Alldatasheet

Document overview

  • Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
  • PDF pages: 35

Technical content

1A Step-down DC/DC Converters with Synchronous Rectifier No.EA-273-210909 OUTLINE T he RP505K Series are low supply current CMOS-based 1A*1 step-down DC/DC Converters with synchronous rectifier. Each of these ICs consists of an oscillator, a reference voltage unit, an error amplifier, a switching control circuit, a mode control circuit, a soft-start circuit, a latch type protection circuit, an under voltage lock out (UVLO) circuit, a thermal shutdown circuit, and a switching transistors. A low ripple, high efficiency synchronous rectifier step-down DC/DC converter can be easily composed of this IC with only an inductor and capacitors. Since the package is DFN(PL)2020-8, high density mounting on boards is possible. In the RP505K series, as for the A version and B version, since feedback resistors are built -in, the voltage is is guaranteed. As for the C version, output voltage is adjustable with external divider resisters. By inputting a signal to MODE pin, the RP505K Series can choose PWM/VFM alternative mode or forced PWM mode. In low output current, PWM/VFM alternative mode automatically switches from PWM to VFM in order to achieve high efficiency. Likewise, in low output current, Forced PWM mode switches at fixed frequency in order to reduce noise. As protection circuits, the RP505K Series contain a current limit circuit which limits the Lx peak current in each clock cycle, and a latch type protection circuit which latches the built-in driver to the OFF state if the load current exceeds the limit value or the output short continues for a specified time (the protection delay time). The latch protective circuit can be released by once putting the IC into the standby mode with the CE pin and then into the active mode, or, by turning the power off and back on. Setting the supply voltage lower than the UVLO detector threshold can also release the latch protective circuit. The RP505K Series also contain a thermal shutdown circuit which detects the overheating and resets the IC when the junction temperature of the RP505K Series exceeds the specified temperature. *1 This is an approximate value, because output current depends on conditions and external parts.

FEATURES

Note: As for 0.8V or less, input voltage range is limited.)

  • Temperature-Drift Coefficient of Output Voltage/ Feedback

APPLICATIONS

  • Power source for portable equipment such as cellular, PDA, DSC, Notebook PC
  • Power source for HDD, WLAN.
  • Power source for Li-ion battery-used equipment BLOCK DIAGRAMS RP505Kxx1A CE PVIN AGND LX Chip Enable Ramp Compensation Current Feedback Current Detector Switching Control UVLO OSC Vref VOUT Mode Control Soft Start PGND MODE Thermal Protection AVIN

In the RP505K Series, output voltage, and auto discharge function for the IC are selectable at the user’s request. Product Name Package Quantity per Reel Pb Free Halogen Free RP505Kxx1$-TR DFN(PL)2020-8 5,000pcs Yes Yes xx : The output voltage can be designated in the range from 0.6V(06) to 3.3V(33) in 0.1V *1 steps. The output voltage adjustable type: xx=00 (For other voltages, please refer to MARK INFORMATIONS.) $ : Designation of Mask Option A) Fixed output voltage type, without auto-discharge function at off state B) Fixed output voltage type, with auto-discharge function at off state C) Adjustable output voltage type, without auto-discharge function at off state Auto-discharge function quickly lowers the output voltage to 0V, when the chip enable signal is switched from the active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor. *1 0.05V step is also available as a custom code. PIN CONFIGURATIONS

  • DFN(PL)2020-8 Top View B ottom View 5 6 7 8 4 3 2 1 8 7 6 5 1 2 3 4
  • RP505K: DFN(PL)2020-8 Pin No. Symbol Description

1 MODE Mode Control Pin (“H” Forced PWM Mode, “L” PWM/VFM Alternative Mode)

2 CE Chip Enable Pin ("H" Active)

3 AVIN Input Pin*1

4 PVIN Input Pin*1

5 LX LX Switching Pin

6 PGND Ground Pin*1

7 AGND Ground Pin*1

8 VOUT/VFB Output Pin / Feedback Pin

Tab is GND level. (They are connected to the reverse side of this IC.) The tab is better to be connected to the GND, but leaving it open is also acceptable. ABSOLUTE MAXIMUM RATINGS (AGND=PGND=0V) Symbol Item Rating Unit A/PVIN AVIN/PVIN Input Voltage -0.3 to 6.5 V VLX LX Pin Voltage -0.3 to A/PVIN + 0.3 V VCE CE Pin Input Voltage -0.3 to 6.5 V VOUT/VFB VOUT/VFB Pin Voltage -0.3 to 6.5 V VMODE MODE Pin Voltage −0.3 to 6.5 V ILX LX Pin Output Current 1.7 A PD Power Dissipation (Standard Test Land Pattern)*1 880 mW Ta Operating Temperature Range -40 to 85 °C Tstg Storage Temperature Range -55 to 125 °C *1 For Power Dissipation and Standard Test Land Pattern, please refer to PACKAGE INFORMATION. ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS) All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions.

ELECTRICAL CHARACTERISTICS

  • RP505Kxx1A/B (Ta=25°C) Symbol Item Conditions Min. Typ. Max. Unit A/PVIN Operating Input Voltage 0.8V < = VOUT < = 3.3V 2.3 5.5 V 0.7V < = VOUT<0.8V 2.3 4.4 0.6V < = VOUT<0.7V, MODE="L" *1 2.3 4.2 VOUT Output Voltage Refer to the conditions below. *2 V ∆VOUT/∆T Output Voltage Temperature Coefficient -40°C < = Ta < = 85°C ±100 ppm/°C fosc Oscillator Frequency Refer to the conditions below. *2 2.00 2.25 2.50 MHz IDD1 Supply Current 1 A/PVIN=VCE=5.5V, VOUT=VSET×0.8 500 840 µA IDD2 Supply Current 2 A/PVIN=VCE=VOUT=5.5V VMODE=0V 40 60 µA VMODE=5.5V 500 840 Istandby Standby Current A/PVIN=5.5V,VCE=0V 0 5 µA ICEH CE "H" Input Voltage A/PVIN=VCE=5.5V -1 0 1 µA ICEL CE "L" Input Voltage A/PVIN=5.5V,VCE=0V -1 0 1 µA IMODEH Mode "H" Input Current A/PVIN=VMODE=5.5V,VCE=0V -1 0 1 µA IMODEL Mode "L" Input Current A/PVIN=5.5V,VCE=VMODE=0V -1 0 1 µA IVOUTH VOUT "H" Input Current*3 A/PVIN=VOUT=5.5V,VCE=0V -1 0 1 µA IVOUTL VOUT "L" Input Current A/PVIN=5.5V,VCE=VOUT=0V -1 0 1 µA RLOW Nch On Resistance for Auto Discharge*4 A/PVIN=3.6V,VCE=0V 30 Ω ILXLEAKH LX Leakage Current "H" A/PVIN=VLX=5.5V,VCE=0V -1 0 5 µA ILXLEAKL LX Leakage Current "L" A/PVIN=5.5V,VCE=VLX=0V -5 0 1 µA VCEH CE "H" Input Voltage A/PVIN=5.5V 1.0 V VCEL CE "L" Input Voltage A/PVIN=2.3V 0.4 V VMODEH Mode ”H” Input Voltage A/PVIN=VCE=5.5V 1.0 V VMODEL Mode ”L” Input Voltage A/PVIN=VCE=2.3V 0.4 V RONP On Resistance of Pch Tr. A/PVIN=3.6V, ILX=−100mA 0.23 Ω RONN On Resistance of Nch Tr. A/PVIN=3.6V, ILX=−100mA 0.20 Ω Maxduty Oscillator Maximum Duty Cycle 100 % tstart Soft-start Time Refer to the conditions below. *2 150 300 µs ILXlim Lx Current Limit Refer to the conditions below. *2 1400 1700 mA tprot Protection Delay Time Refer to the conditions below. *2 0.5 1.5 5 ms VUVLO1 UVLO Detector Threshold A/PVIN=VCE 1.9 2.0 2.1 V VUVLO2 UVLO Released Voltage A/PVIN=VCE 2.0 2.1 2.2 V TTSD Thermal Shutdown Temperature Junction Temperature 140 °C TTSR Thermal Shutdown Released Temperature Junction Temperature 100 °C Note: Test circuit is "OPEN LOOP" and AGND=PGND=0V unless otherwise specified. *1 0.6V < = VOUT<0.7V: MODE=“L”PWM/VFM Alternative Mode. *2 A/PVIN=VCE=3.6V (VSET < = 2.6V), A/PVIN=VCE=VSET+1V (VSET>2.6V) *3 with no auto discharge version only *4 with auto discharge version only
  • RP505K001C (Ta=25°C) Symbol Item Conditions Min. Typ. Max. Unit A/PVIN Operating Input Voltage 2.3 5.5 V VFB Feedback Output Voltage A/PVIN=VCE=3.6V 0.591 0.600 0.609 V ∆VFB/∆T Feedback Output Voltage Temperature Coefficient -40°C < = Ta < = 85°C ±100 ppm/°C fosc Oscillator Frequency Refer to the conditions below. *1 2.00 2.25 2.50 MHz IDD1 Supply Current 1 A/PVIN=VCE=5.5V, VFB=0.48V 500 840 µA IDD2 Supply Current 2 A/PVIN=VCE=VOUT=5.5V VMODE=0V 40 60 µA VMODE=5.5V 500 840 Istandby Standby Current A/PVIN=5.5V,VCE=0V 0 5 µA ICEH CE "H" Input Voltage A/PVIN=VCE=5.5V -1 0 1 µA ICEL CE "L" Input Voltage A/PVIN=5.5V,VCE=0V -1 0 1 µA IMODEH Mode "H" Input Current A/PVIN=VMODE=5.5V,VCE=0V -1 0 1 µA IMODEL Mode "L" Input Current A/PVIN=5.5V,VCE=VMODE=0V -1 0 1 µA IVFBH VFB "H" Input Current A/PVIN=VOUT=5.5V,VCE=0V -1 0 1 µA IVFBL VFB "L" Input Current A/PVIN=5.5V,VCE=VOUT=0V -1 0 1 µA ILXLEAKH LX Leakage Current "H" A/PVIN=VLX=5.5V,VCE=0V -1 0 5 µA ILXLEAKL LX Leakage Current "L" A/PVIN=5.5V,VCE=VLX=0V -5 0 1 µA VCEH CE "H" Input Voltage A/PVIN=5.5V 1.0 V VCEL CE "L" Input Voltage A/PVIN=2.3V 0.4 V VMODEH Mode ”H” Input Voltage A/PVIN=VCE=5.5V 1.0 V VMODEL Mode ”L” Input Voltage A/PVIN=VCE=2.3V 0.4 V RONP On Resistance of Pch Tr. A/PVIN=3.6V, ILX=−100mA 0.23 Ω RONN On Resistance of Nch Tr. A/PVIN=3.6V, ILX=−100mA 0.20 Ω Maxduty Oscillator Maximum Duty Cycle 100 % tstart Soft-start Time Refer to the conditions below. *1 150 300 µs ILXlim LX Current Limit Refer to the conditions below. *1 1400 1700 mA tprot Protection Delay Time Refer to the conditions below. *1 0.5 1.5 5 ms VUVLO1 UVLO Detector Threshold A/PVIN=VCE 1.9 2.0 2.1 V VUVLO2 UVLO Released Voltage A/PVIN=VCE 2.0 2.1 2.2 V TTSD Thermal Shutdown Temperature Junction Temperature 140 °C TTSR Thermal Shutdown Released Temperature Junction Temperature 100 °C Test circuit is "OPEN LOOP" and AGND=PGND=0V unless otherwise specified. *1 A/PVIN=VCE=3.6V (VSET < = 2.6V), A/PVIN=VCE=VSET+1V (VSET>2.6V)

(Fixed Output Voltage Type) PVIN CE LX VOUT PGND AGND VIN CIN 4.7µF COUT 10µF VOUT L 2.2µH RP505K Series AVIN MODE ∗) MODE=“H” Forced PWM Mode MODE=“L” PWM/VFM Alternative Mode (Adjustable Output Voltage Type) PVIN CE LX VFB PGND AGND VIN CIN 4.7µF COUT 10µF VOUT L 2.2µH RP505K Series AVIN MODE ∗) MODE=“H” Forced PWM Mode MODE=“L”PWM/VFM Alternative Mode Symbol Recommendation components CIN 4.7µF Ceramic C1608JB0J475K(TDK) COUT 10µF Ceramic C1608JB0J106M(TDK) L 2.2µH Inductor MIPSA2520D2R2(FDK)

When you use these ICs, consider the following issues: ⋅ Set the same level as AGND and PGND. ⋅ Set the same level as AVIN and PVIN. ⋅ Place the external parts as close as possible to the IC by using a short as possible wiring. Especially, place the capacitor as close as possible to the PVIN and PGND pins. Ensure the VDD and GND lines are sufficiently robust. If their impedances are too high, the electrical potential of the inside of the IC could be fluctuated by switching current, and noise pickup or unstable operation could be the results. Please note that the large switching current flows through the V DD line, the GND line, an inductor, the L X, and the VOUT line. Separate the line between the VOUT pin and an inductor (A and B versions), and the line between a resistor for setting output voltage (R1) and an inductor (C version), from the line connected to the load. Use a ceramic capacitor with the small ESR value. ⋅ The recommended capacitance value for the CIN capacitor connected between the PVIN and PGND pins is 4.7µF or more. Also, the recommended capacitance value for the COUT capacitor is 10µF. ⋅ The Inductance value should be set within the rage of 1.0 to 2.2µH. However, the inductance value is limited by output voltage, so please refer to the table below. For stable operation, the phase compensation is set according to the specified inductance value and the specified COUT capacitance value. Select the inductor with low DC resistance, with large permissive current, with high resistant to magnetic saturation. Select the inductance value considering the load current by the conditions of use. If the inductance value is small, the L X peak current may increase along with the increase of load current. When the LX peak current reaches to the “LX limit current”, the current limit circuit may be activated. 【Inductance Range vs. Output Voltage Range】 VOUT [V] L=1.0μH L=1.5μH L=2.2μH 0.6~1.55 ○ ○ ○ 1.6~2.3 × ○ ○ 2.35~3.3 × × ○ ⋅ Please note that Current limit circuit and Latch type protection circuit could be affected by self -heating or heat dissipation environment. ⋅ For adjustable output voltage type (C version), the output voltage (V OUT) is adjustable by changing the R 1 and R2 values as follows. VOUT = VFB × (R1 + R2) / R2 (0.8V < = VOUT < = 3.3V) If the R1 and R2 values are large, the impedances of the V FB pin become large and could be easily affected by noise. Therefore, set the R 2 value to 220k Ω or less. If the operation becomes unstable due to the high impedance, the impedance should be decreased. The C 1 value can be calculated by the following formula. Please use the value close to the calculation result. C ∗ The performance of power supply circuits using this IC largely depends on the peripheral circuits. Please be very careful when setting the peripheral parts. When designing the peripheral circuits of each part, PCB patterns, and this IC, please do not exceed the rated values (Voltage, Current, Power).

Operation of Step-down DC/DC Converter and Output Current The DC/DC converter charges energy in the inductor when LX transistor is ON, and discharges the energy from the inductor when LX transistor is OFF and controls with less energy loss, so that a lower output voltage than the input voltage is obtained. The operation will be explained with reference to the following diagrams: <Basic Circuit> <Current through L> Pch Tr L Nch Tr VIN VOUT CL GND T=1/fosc ton toff topen ILmin ILmax IL i1 i2 ⋅ Step 1 : Pch Tr. turns on and current IL (=i1) flows, and energy is charged into CL. At this moment, IL increases from ILmin (=0) to reach ILmax in proportion to the on-time period (ton) of Pch Tr. ⋅ Step 2 : When Pch Tr. turns off, Synchronous rectifier Nch Tr. turns on in order that L maintains IL at ILmax, and current IL (=i2) flows. ⋅ Step 3: IL (=i2) decreases gradually and reaches IL= ILmin=0 after a time period of t open, and Nch Tr. turns off. Provided that in the continuous mode, next cycle starts before IL becomes to 0 because t off time is not enough. In this case, IL value increases from this ILmin (>0). In the case of PWM control system, the output voltage is maintained by controlling the on- time period (ton), with the oscillator frequency (fosc) being maintained constant. The maximum value (IL max) and the minimum value (IL min) of the current flowing through the inductor are the same as those when Pch Tr. turns on and off. The difference between ILmax and ILmin, which is represented by ∆I: Wherein, T = 1 / fosc = ton + toff duty (%)= ton / T × 100 = ton × fosc × 100 topen ≤ toff In Equation 1, VOUT × topen / L and (VIN − VOUT) × ton / L respectively show the change of the current at "OFF", and the change of the current at "ON".

Discontinuous mode and Continuous mode When the output current (I OUT) is relatively small, t open < toff as illustrated in the above diagram. In this case, the energy is charged in the inductor during the time period of ton and is discharged in its entirely during the time period of t off, therefore IL min becomes to zero (IL min=0). When I OUT is gradually increased, eventually, t open becomes to t off (topen=toff), and when I OUT is further increased, IL min becomes larger than zero (IL min>0). The former mode is referred to as the discontinuous mode and the latter mode is referred to as continuous mode. Discontinuous mode Continuous mode ILmax ILmin ton toff T=1/fosc topen IL t ILmax ILmin ton toff T=1/fosc IL Iconst t In the continuous mode, when Equation 1 is solved for ton and assumed that the solution is tonc, When ton<tonc, the mode is the discontinuous mode, and when ton=tonc, the mode is the continuous mode.

Forced PWM Mode Control and VFM Mode Control By setting the Mode pin to H, the IC switches the frequency at the fixed rate to reduce noise even when output load is light . Therefore, when I OUT is ∆IL/2 or less, IL min becomes less than 0. That is, the IC discharges the electrical charge in CL to the IC side until the IL changes from ILmin to 0 during ton time, and the IL changes from 0 to ILmin during toff time. Forced PWM Mode Control ILmax ILmin ton toff T=1/fosc IL IOUT t ΔIL By setting the Mode pin to L, the IC automatically switches into VFM mode for high efficiency when output load is light. Under VFM mode, ton indicates the time until the IC reaches to the pre-set ILmax. With the RP505K Series, ILmax during VFM control is pre-set to 280mA or so. However, even if the IC is not reached to ILmax yet, ton turns off when it becomes around 1.5 times of T=1/fosc. VFM Mode Control ILmax ILmin ton toff IL t

Output Current and Selection of External Components The relation between the output current and external components is as follows: (Wherein, Ripple Current p-p value is described as I RP, ON resistance of Pch Tr. and Nch Tr. of L X are respectively described as RONP and RONN, and the DC resistor of the inductor is described as RL.) When Pch Tr. of LX is ON: When Pch Tr. of L X is "OFF" (Nch Tr. is "ON"): Put Equation 4 to Equation 3 and solve for ON duty of Pch transistor, D ON = ton / (toff + ton), Ripple Current is as follows: I wherein, peak current that flows through L, and L X Tr. is as follows: ∗Consider IL Xmax, condition of input and output and select external components. ∗The above explanation is directed to the calculation in an ideal case in continuous mode.

(1) Soft-start Time

  • In the case of starting this IC with CE In the case of starting this IC with CE, the operation can be as in the timing chart below. When the voltage of CE pin (VCE) is beyond the threshold level, the operation of the IC starts. The threshold voltage of CE pin is in between CE "H" input voltage (VCEH) and CE "L" input voltage (VCEL) described in the electrical characteristics table. Soft -start circuit operates, and after the certain time, the reference voltage inside the IC (VREF) is rising gradually up to the constant value. VCEH Soft-start Time IC Internal Voltage Reference VCEL Threshold Level Lx Voltage (VCE) (VREF) Soft-start Circuit operating (VLX) Depending on Power supply, Load Current, External Components (VOUT) Output Voltage CE Pin Input Voltage PWM mode operating during the Soft-start Time Soft-start time is the time interval from soft -start circuit starting point to the reference voltage level reaching point up to this constant level. ∗Soft-start time is not always equal to the turn-on speed of DC/DC converter. The power supply capacity for this IC, load current, inductance and capacitance values affect the turn- on speed.
  • In the case of starting with power supply In the case of starting with power supply, when the input voltage (VIN) is larger than UVLO released voltage (VUVLO2), soft-start circuit operates, and after that, the same explanation above is applied to the operation. Soft-start time is the time interval from soft -start circuit starting point to the reference voltage level reaching point up to this constant level. Output Voltage Input Voltage VUVLO2 IC Internal Voltage Reference VUVLO1 Lx Voltage Set VOUT Set VOUT Soft-start Time Depending on Power supply, Load Current, External Components PWM mode operating during the Soft-start Time ( VOUT) ( VIN) ( VREF) ( VLX) ∗ Turn-on speed is affected by next conditions; (a) Input Voltage (VIN) rising speed depending on the power supplier to the IC and input capacitor CIN. (b) Output Capacitor COUT value and load current value.

(2) Under Voltage Lockout (UVLO) Circuit The step-down DC/DC converter stops and ON duty becomes 100%, if input voltage (V IN) becomes less than the set output voltage (Set VOUT), the output voltage (VOUT) gradually drops according to the input voltage (VIN). If the input voltage drops more and becomes less than UVLO detector threshold (VUVLO1), the under voltage lockout circuit (UVLO) operates, the IC internal reference voltage (V REF) stops, switching transistors turn off and the output voltage drops according to the load and output capacitor COUT value. To restart the normal operation, the input voltage (VIN) must be more than the UVLO released voltage (VUVLO2). The timing chart below describes the operation with varying the input voltage (V IN). VUVLO2 VUVLO1 Set VOUT Set VOUT Output Voltage Input Voltage IC Internal Voltage Reference Lx Voltage Soft-start Time Depending on Power supply, Load Current, External Components ( VOUT) ( VIN) ( VREF) ( VLX) ∗Actually, the waveform of V OUT at UVLO working and releasing varies depending on the initial voltage of COUT and load current situation.

(3) Over Current Protection Circuit, Latch Type Protection Circuit Over current protection circuit supervises the inductor peak current (the current flowing through Pch transistor) in each switching cycle, and if the current exceeds the L X current limit (I LXlim), turns off Pch transistor. The LX current limit of RP505K is Typ.1700mA. Latch type protection circuit latches the built-in driver to the OFF state and stops the operation of DC/DC converter if the over current status continues or the output voltage continues being the half of the setting voltage for equal or longer than protection delay time (tprot). ∗ LX current limit (ILXlim) and protection delay time (t prot) could be easily affected by self-heating or ambient environment. If the input voltage (V IN) drops drastically or becomes unstable due to short -circuit, the protection operation and protection delay time may be affected. Protection Delay Time (tprot) Lx Current Limit (ILXlim) Lx Current Pch Tr. Current Lx Voltage (VLX) To release the condition of latch type protection, restart this IC by inputting "L" signal to CE pin, or restart this IC with power-on or make the supply voltage lower than UVLO detector threshold (VUVLO1) level. The timing chart shown below describes the changing process of input voltage rising, stable operating, operating with large current, reset with CE pin, stable operating, input voltage falling, input voltage recovering, and stable operating. Point(1) : If the large current flows through the circuit or the IC goes into low output voltage condition due to short-circuit or other reasons, the latch type protection circuit latches the built-in driver to OFF state after the protection delay time (t prot). Then, VLX becomes "L" and the output voltage turns OFF. In this timing char t below, the latch protective circuit can be released by once putting the IC into "L" with the CE pin and then into "H" again. Point(2) : The latch type protection can be released by UVLO reset by making the input voltage lower than the UVLO detector threshold(VUVLO1) Input Voltage (VIN) Set VOUT UVLO Detect Voltage (VUVLO1) CE Pin Input Voltage (VCE) Set VOUT Threshold Level Lx Voltage (VLX) Set VOUT Output Voltage (VOUT) UVLO Release Voltage (VUVLO2) (1) (2) Soft-start Time Set VOUT Soft-start Time Soft-start Time Stable operation Protection Delay Time Protection Delay Time UVLO Reset CE Reset Latch-type Protection Latch-type Protection Stable operation Stable operation

1) Output Voltage vs. Output Current RP505K VOUT=0.8V RP505K VOUT=0.8V MODE=“L”PWM/VFM automatic shift MODE=“H” forced PWM RP505K VOUT=1.2V RP505K VOUT=1.2V MODE=“L”PWM/VFM automatic shift MODE=“H” forced PWM RP505K VOUT=1.8V RP505K VOUT=1.8V MODE=“L”PWM/VFM automatic shift MODE=“H” forced PWM 0.780 0.785 0.790 0.795 0.800 0.805 0.810 0.815 0.820 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Output Voltage VOUT (V) VIN=3.6V VIN=5.0V 0.780 0.785 0.790 0.795 0.800 0.805 0.810 0.815 0.820 0 200 400 600 800 1000 Output Current IOUT (mA) Output Voltage VOUT (V) VIN=3.6V VIN=5.0V 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Output Voltage VOUT (V) VIN=3.6V VIN=5.0V 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 0 200 400 600 800 1000 Output Current IOUT (mA) Output Voltage VOUT (V) VIN=3.6V VIN=5.0V 1.770 1.775 1.780 1.785 1.790 1.795 1.800 1.805 1.810 1.815 1.820 1.825 1.830 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Output Voltage VOUT (V) VIN=3.6V VIN=5.0V 1.770 1.775 1.780 1.785 1.790 1.795 1.800 1.805 1.810 1.815 1.820 1.825 1.830 0 200 400 600 800 1000 Output Current IOUT (mA) Output Voltage VOUT (V) VIN=3.6V VIN=5.0V

RP505K VOUT=3.3V RP505K VOUT=3.3V MODE=“L”PWM/VFM automatic shift MODE=“H” forced PWM 2) Output Voltage vs. Input Voltage RP505K VOUT=0.8V RP505K VOUT=1.2V MODE=“H” forced PWM MODE=“H” forced PWM RP505K VOUT=1.8V RP505K VOUT=3.3V MODE=“H” forced PWM MODE=“H” forced PWM 3.260 3.270 3.280 3.290 3.300 3.310 3.320 3.330 3.340 3.350 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Output Voltage VOUT (V) VIN=4.3V VIN=5.0V 3.260 3.270 3.280 3.290 3.300 3.310 3.320 3.330 3.340 3.350 0 200 400 600 800 1000 Output Current IOUT (mA) Output Voltage VOUT (V) VIN=4.3V VIN=5.0V 0.78 0.79 0.80 0.81 0.82 Input Voltage VIN (V) Output Voltage VOUT (V) IOUT=1mA IOUT=100mA IOUT=800mA 1.18 1.19 1.20 1.21 1.22 Input Voltage VIN (V) Output Voltage VOUT (V) IOUT=1mA IOUT=100mA IOUT=800mA 1.77 1.78 1.79 1.80 1.81 1.82 1.83 Input Voltage VIN (V) Output Voltage VOUT (V) IOUT=1mA IOUT=100mA IOUT=800mA 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 3.8 4.3 4.8 5.3 Input Voltage VIN (V) Output Voltage VOUT (V) IOUT=1mA IOUT=100mA IOUT=800mA

3) Output Voltage vs. Temperature 4 ) Feedback Voltage vs. Temperature RP505K181A/B RP505K001C 5) Efficiency vs. Output Current RP505K VOUT=0.8V RP505K VOUT=1.2V RP505K VOUT=1.8V RP505K VOUT=3.3V 0.591 0.594 0.597 0.600 0.603 0.606 0.609 -50 -25 0 25 50 75 100 Temperature Ta (°C) Feedback Voltage VFB (V) VIN=3.6V 1.770 1.780 1.790 1.800 1.810 1.820 1.830 -50 -25 0 25 50 75 100 Temperature Ta (°C) Output Voltage VOUT (V) VIN=3.6V 100 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Efficiency (%) VIN=VMODE=3.6V VIN=VMODE=5.0V VIN=5.0V, VMODE=0V 100 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Efficiency (%) VIN=VMODE=3.6V VIN=VMODE=5.0 VIN=5.0V, VMODE=0V VIN=3.6V, VMODE=0VVIN=3.6V, VMODE=0V 100 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Efficiency (%) VIN=VMODE=3.6V VIN=VMODE=5.0V VIN=5.0V, VMODE=0V VIN=3.6V, VMODE=0V 100 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Efficiency (%) VIN=VMODE=4.3V VIN=VMODE=5.0V VIN=5.0V, VMODE=0V VIN=4.3V, VMODE=0V

6) Supply Current vs. Temperature 7 ) Supply Current vs. Input Voltage RP505K VOUT=1.8V(VIN=5.5V) RP505K VOUT=1.8V MODE=“L”PWM/VFM automatic shift MODE=“L”PWM/VFM automatic shift 8) DC/DC Output Waveform RP505K VOUT=0.8V(VIN=3.6V) RP505K VOUT=0.8V(VIN=3.6V) MODE=“L”PWM/VFM automatic shift MODE=“H” forced PWM RP505K VOUT=1.2V(VIN=3.6V) RP505K VOUT=1.2V(VIN=3.6V) MODE=“L”PWM/VFM automatic shift MODE=“H” forced PWM -50 0 50 100 Temperature Ta (°C) Supply Current (µA) Closed Loop Open Loop Input Voltage VIN (V) Supply Current (µA) Closed Loop Open Loop IOUT=10mA 0.00 0.01 0.02 0.03 0.04 0 10 20 30 40 Time t (µs) Output Ripple Voltage(AC) Vripple (V) -100 100 200 300 Inductor Current IL (mA) Output Voltage IL IOUT=10mA 0.00 0.01 0.02 0.03 0.04 0 5 10 15 20 Time t (µs) Output Ripple Voltage(AC) Vripple (V) -100 -50 100 Inductor Current IL (mA) Output Voltage IL IOUT=10mA 0.00 0.01 0.02 0.03 0.04 0 10 20 30 40 Time t (µs) Output Ripple Voltage(AC) Vripple (V) -100 100 200 300 Inductor Current IL (mA) Output Voltage IL IOUT=10mA 0.00 0.01 0.02 0.03 0.04 0 5 10 15 20 Time t (µs) Output Ripple Voltage(AC) Vripple (V) -100 -50 100 Inductor Current IL (mA) Output Voltage IL

RP505K VOUT=1.8V(VIN=3.6V) RP505K VOUT=1.8V(VIN=3.6V) MODE=“L”PWM/VFM automatic shift MODE=“H” forced PWM RP505K VOUT=3.3V(VIN=5.0V) RP505K VOUT=3.3V(VIN=5.0V) MODE=“L”PWM/VFM automatic shift MODE=“H” forced PWM IOUT=10mA 0.00 0.01 0.02 0.03 0.04 0 10 20 30 40 Time t (µs) Output Ripple Voltage(AC) Vripple (V) -100 100 200 300 Inductor Current IL (mA) Output Voltage IL IOUT=10mA 0.00 0.01 0.02 0.03 0.04 0 5 10 15 20 Time t (µs) Output Ripple Voltage(AC) Vripple (V) -100 -50 100 Inductor Current IL (mA) Output Voltage IL IOUT=10mA 0.00 0.01 0.02 0.03 0.04 0 10 20 30 40 Time t (µs) Output Ripple Voltage(AC) Vripple (V) -100 100 200 300 Inductor Current IL (mA) Output Voltage IL IOUT=10mA 0.00 0.01 0.02 0.03 0.04 0 5 10 15 20 Time t (µs) Output Ripple Voltage(AC) Vripple (V) -100 -50 100 Inductor Current IL (mA) Output Voltage IL

9) Oscillator Frequency vs. Temperature 10) Oscillator Frequency vs. Input Voltage 11) Soft-start Time vs. Temperature 12) UVLO Detector Threshold / Released Voltage vs. Temperature UVLO Detector Threshold UVLO Released Voltage 2.1 2.2 2.3 2.4 2.5 Input Voltage VIN (V) Frequency fosc (MHz) 85°C 25°C -40°C 2.1 2.2 2.3 2.4 2.5 -50 -25 0 25 50 75 100 Temperature Ta (°C) Frequency fosc (MHz) VIN=3.6V 150 160 170 180 190 200 210 -50 -25 0 25 50 75 100 Temperature Ta (°C) Soft Start Time tstart (µs) 1.9 2.0 2.1 2.2 2.3 -50 -25 0 25 50 75 100 Temperature Ta (°C) UVLO Voltage VUVLO1 (V) 1.9 2.0 2.1 2.2 2.3 -50 -25 0 25 50 75 100 Temperature Ta (°C) UVLO Voltage VUVLO2 (V)

13) CE Input Voltage vs. Temperature CE“H” Input Voltage(VIN=5.5V) CE“L” Input Voltage (VIN=2.3V) 14) LX Current Limit vs. Temperature 15）Nch Tr. ON Resistance vs. Temperature 16）Pch Tr. ON Resistance vs. Temperature 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -50 -25 0 25 50 75 100 Temperature Ta (°C) CE Input Voltage VCE (V) 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -50 -25 0 25 50 75 100 Temperature Ta (°C) CE Input Voltage VCE (V) 1500 1600 1700 1800 1900 2000 -50 -25 0 25 50 75 100 Temperature Ta (°C) LX Current Limit Ilim (mA) 0.0 0.1 0.2 0.3 0.4 -50 -25 0 25 50 75 100 Temperature Ta (°C) Nch Tr. ONResistance RON (Ω) 0.0 0.1 0.2 0.3 0.4 -50 -25 0 25 50 75 100 Temperature Ta (°C) Pch Tr. ONResistance RON (Ω)

17) Load Transient Response RP505K081A/B (VIN=3.6V) RP505K081A/B (VIN=3.6V) MODE=“L”PWM/VFM automatic shift MODE=“L”PWM/VFM automatic shift RP505K081A/B (VIN=3.6V) RP505K081A/B (VIN=3.6V) MODE=“H” forced PWM MODE=“H” forced PWM RP505K081A/B (VIN=3.6V) RP505K081A/B (VIN=3.6V) 0.65 0.70 0.75 0.80 0.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 0.70 0.75 0.80 0.85 0.90 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 0.65 0.70 0.75 0.80 0.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 0.70 0.75 0.80 0.85 0.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 0.65 0.70 0.75 0.80 0.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 300mA-->800mA 0.70 0.75 0.80 0.85 0.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 800mA-->300mA

RP505K181A/B (VIN=3.6V) RP505K181A/B (VIN=3.6V) MODE=“L”PWM/VFM automatic shift MODE=“L”PWM/VFM automatic shift RP505K181A/B (VIN=3.6V) RP505K181A/B (VIN=3.6V) MODE=“H” forced PWM MODE=“H” forced PWM RP505K181A/B (V IN=3.6V) RP505K181A/B (VIN=3.6V) 1.65 1.70 1.75 1.80 1.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 1.70 1.75 1.80 1.85 1.90 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 1.65 1.70 1.75 1.80 1.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 1.65 1.70 1.75 1.80 1.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 300mA-->800mA 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 800mA-->300mA

RP505K331A/B (VIN=5.0V) RP505K331A/B (VIN=5.0V) MODE=“L”PWM/VFM automatic shift MODE=“L”PWM/VFM automatic shift RP505K331A/B (VIN=5.0V) RP505K331A/B (VIN=5.0V) MODE=“H” forced PWM MODE=“H” forced PWM RP505K331A/B (V IN=5.0V) RP505K331A/B (VIN=5.0V) 3.15 3.20 3.25 3.30 3.35 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 3.20 3.25 3.30 3.35 3.40 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 3.15 3.20 3.25 3.30 3.35 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 3.20 3.25 3.30 3.35 3.40 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 3.15 3.20 3.25 3.30 3.35 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 300mA-->800mA 3.20 3.25 3.30 3.35 3.40 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 800mA-->300mA

RP505K001C (VIN=3.6V, VOUT=0.8V) RP505K001C (VIN=3.6V, VOUT=0.8V) MODE=“L”PWM/VFM automatic shift MODE=“L”PWM/VFM モード自動切替え RP505K001C (VIN=3.6V, VOUT=0.8V) RP505K001C (VIN=3.6V, VOUT=0.8V) MODE=“H” forced PWM MODE=“H” forced PWM RP505K001C (VIN=3.6V, VOUT=0.8V) RP505K001C (VIN=3.6V, VOUT=0.8V) 0.65 0.70 0.75 0.80 0.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 0.70 0.75 0.80 0.85 0.90 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 0.65 0.70 0.75 0.80 0.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 0.70 0.75 0.80 0.85 0.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 0.65 0.70 0.75 0.80 0.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 300mA-->800mA 0.70 0.75 0.80 0.85 0.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 800mA-->300mA

RP505K001C (VIN=3.6V, VOUT=1.2V) RP505K001C (VIN=3.6V, VOUT=1.2V) MODE=“L”PWM/VFM automatic shift MODE=“L”PWM/VFM automatic shift RP505K001C (VIN=3.6V, VOUT=1.2V) RP505K001C (VIN=3.6V, VOUT=1.2V) MODE=“H” forced PWM MODE=“H” forced PWM RP505K001C (VIN=3.6V, VOUT=1.2V) RP505K001C (VIN=3.6V, VOUT=1.2V) 1.05 1.10 1.15 1.20 1.25 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 1.10 1.15 1.20 1.25 1.30 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 1.05 1.10 1.15 1.20 1.25 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 1.10 1.15 1.20 1.25 1.30 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 1.05 1.10 1.15 1.20 1.25 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 300mA-->800mA 1.10 1.15 1.20 1.25 1.30 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 800mA-->300mA

RP505K001C (VIN=3.6V, VOUT=1.8V) RP505K001C (VIN=3.6V, VOUT=1.8V) MODE=“L”PWM/VFM automatic shift MODE=“L”PWM/VFM automatic shift RP505K001C (VIN=3.6V, VOUT=1.8V) RP505K001C (VIN=3.6V, VOUT=1.8V) MODE=“H” forced PWM MODE=“H” forced PWM RP505K001C (VIN=3.6V, VOUT=1.8V) RP505K001C (VIN=3.6V, VOUT=1.8V) 1.65 1.70 1.75 1.80 1.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 1.70 1.75 1.80 1.85 1.90 -10 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 1.65 1.70 1.75 1.80 1.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 1.65 1.70 1.75 1.80 1.85 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 300mA-->800mA 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (us) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 800mA-->300mA

RP505K001C (VIN=5.0V, VOUT=3.3V) RP505K001C (VIN=5.0V, VOUT=3.3V) MODE=“L”PWM/VFM automatic shift MODE=“L”PWM/VFM automatic shift RP505K001C (VIN=5.0V, VOUT=3.3V) RP505K001C (VIN=5.0V, VOUT=3.3V) MODE=“H” forced PWM MODE=“H” forced PWM RP505K001C (VIN=5.0V, VOUT=3.3V) RP505K001C (VIN=5.0V, VOUT=3.3V) 3.15 3.20 3.25 3.30 3.35 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 3.20 3.25 3.30 3.35 3.40 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 3.15 3.20 3.25 3.30 3.35 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 3.20 3.25 3.30 3.35 3.40 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA 3.15 3.20 3.25 3.30 3.35 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 300mA-->800mA 3.20 3.25 3.30 3.35 3.40 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 250 500 750 1000 Output Current IOUT (mA) Output Voltage Output Current 800mA-->300mA

18) Mode Switching Waveform RP505K181A/B (VIN=3.6V, IOUT=1mA) RP505K181A/B (VIN=3.6V, IOUT=1mA) RP505K001C (VIN=3.6V, VOUT=1.2V, IOUT=1mA) RP505K001C (VIN=3.6V, VOUT=1.2V, IOUT=1mA) RP505K001C (VIN=3.6V, VOUT=1.8V, IOUT=1mA) RP505K001C (VIN=3.6V, VOUT=1.8V, IOUT=1mA) 1.75 1.80 1.85 1.90 -200 0 200 400 600 800 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V)Output Voltage Mode Input Voltage 1.75 1.80 1.85 1.90 -200 0 200 400 600 800 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V)Output Voltage Mode Input Voltage 1.15 1.20 1.25 1.30 -200 0 200 400 600 800 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V)Output Voltage Mode Input Voltage 1.15 1.20 1.25 1.30 -200 0 200 400 600 800 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V)Output Voltage Mode Input Voltage 1.75 1.80 1.85 1.90 -200 0 200 400 600 800 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V) Output Voltage Mode Input Voltage 1.75 1.80 1.85 1.90 -200 0 200 400 600 800 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V)Output Voltage Mode Input Voltage

PACKAGE INFORMATION

Power Dissipation (DFN(PL)2020−8) Pow er Dissipation (P D) depends on conditions of mounting on board. This specification is based on the measurement at the condition below: Measur ement Conditions St andard Test Land Pattern Environment Mounting on Board (Wind velocity=0m/s) Board Material Glass cloth epoxy plastic (Double sided) Board Dimensions 40mm*40mm*1.6mm Copper Ratio Top side: Approx. 50%, Back side: Approx. 50% Through-holes φ 0.54mm * 30pcs Measur ement Result: (Ta=25°C, Tjmax=125°C) St andard Test Land Pattern Power Dissipation 880mW Thermal Resistance θja = (125-25 °C)/0.88W = 114 °C/W Power Dissipation PD (mW) 1200 1000 800 600 400 200 0 25 50 75 100 125 150 Ambient Temperature (°C) Power Dissipation 880 On Board Measurement Board Pattern IC Mount Area (Unit : mm)

Package Dimensions (DFN(PL)2020−8) Mark Specification (DFN(PL)2020−8) : Product Code … Please refer to the RP505K Series Mark Specification Table. : Lot Number … Alphanumeric Serial Number 2.00 2.00 A B 0.05 INDEX 0.6MAX. 0.05 SS 0.05min 0.25±0.10.25±0.1 0.5 1.8±0.1 0.25±0.1

0.05 M AB

1.0±0.1 C0.2 (Unit : mm) Bottom View ※) Tab is GND level (they are connected to the reverse side of this IC). The tab is better to be connected to the GND, but leaving it open is also acceptable. 8765 1234  

RP505K Series Mark Specification PKG: DFN(PL)2020−8 RP 505Kxx1A RP505Kxx1B RP505K061A CU06 RP505K061B CV06 RP505K071A CU07 RP505K071B CV07 RP505K081A CU08 RP505K081B CV08 RP505K091A CU09 RP505K091B CV09 RP505K101A CU10 RP505K101B CV10 RP505K111A CU11 RP505K111B CV11 RP505K121A CU12 RP505K121B CV12 RP505K131A CU13 RP505K131B CV13 RP505K141A CU14 RP505K141B CV14 RP505K151A CU15 RP505K151B CV15 RP505K161A CU16 RP505K161B CV16 RP505K171A CU17 RP505K171B CV17 RP505K181A CU18 RP505K181B CV18 RP505K191A CU19 RP505K191B CV19 RP505K201A CU20 RP505K201B CV20 RP505K211A CU21 RP505K211B CV21 RP505K221A CU22 RP505K221B CV22 RP505K231A CU23 RP505K231B CV23 RP505K241A CU24 RP505K241B CV24 RP505K251A CU25 RP505K251B CV25 RP505K261A CU26 RP505K261B CV26 RP505K271A CU27 RP505K271B CV27 RP505K281A CU28 RP505K281B CV28 RP505K291A CU29 RP505K291B CV29 RP505K301A CU30 RP505K301B CV30 RP505K311A CU31 RP505K311B CV31 RP505K321A CU32 RP505K321B CV32 RP505K331A CU33 RP505K331B CV33 RP505K121A5 CU01 RP505K121B5 CV01 RP505K001C Product Name  RP505K001C CW00

1.5IFQSPEVDUTBOEUIFQSPEVDUTQFDJpDBUJPOTEFTDSJCFEJOUIJTEPDVNFOUBSFTVCKFDUUPDIBOHFPSEJTDPOUJOVBUJPOPG QSPEVDUJPOXJUIPVUOPUJDFGPSSFBTPOTTVDIBTJNQSPWFNFOU5IFSFGPSF,CFGPSFEFDJEJOHUPVTFUIFQSPEVDUT QMFBTFSFGFS UPourTBMFTSFQSFTFOUBUJWFTGPSUIFMBUFTUJOGPSNBUJPOUIFSFPO. 2.5IFNBUFSJBMTJOUIJTEPDVNFOUNBZOPUCFDPQJFEPSPUIFSXJTFSFQSPEVDFEJOXIPMFPSJOQBSUXJUIPVUQSJPSXSJUUFO DPOTFOUPGour company. 3.1MFBTFCFTVSFUPUBLFBOZOFDFTTBSZ GPSNBMJUJFTVOEFSSFMFWBOUMBXTPSSFHVMBUJPOTCFGPSFFYQPSUJOHPSPUIFSXJTF UBLJOHPVUPGZPVSDPVOUSZUIFQSPEVDUTPSUIFUFDIOJDBMJOGPSNBUJPOEFTDSJCFEIFSFJO 4.5IFUFDIOJDBMJOGPSNBUJPOEFTDSJCFEJOUIJTEPDVNFOUTIPXTUZQJDBMDIBSBDUFSJTUJDTPGBOEFYBNQMFBQQMJDBUJPODJSDVJUT GPSUIFQSPEVDUT5IFSFMFBTFPGTVDIJOGPSNBUJPOJTOPUUPCFDPOTUSVFEBTBXBSSBOUZPGPSBHSBOUPGMJDFOTFVOEFS our company's PSBOZUIJSEQBSUZTJOUFMMFDUVBMQSPQFSUZSJHIUTPSBOZPUIFSSJHIUT. 5.5IFQSPEVDUTMJTUFEJOUIJTEPDVNFOUBSFJOUFOEFEBOEEFTJHOFEGPSVTFBTHFOFSBMFMFDUSPOJDDPNQPOFOUTJOTUBOEBSE BQQMJDBUJPOT P⒏DFFRVJQNFOU UFMFDPNNVOJDBUJPOFRVJQNFOU NFBTVSJOHJOTUSVNFOUT DPOTVNFSFMFDUSPOJDQSPEVDUT BNVTFNFOUFRVJQNFOUFUD 5IPTFDVTUPNFSTJOUFOEJOHUPVTFBQSPEVDUJOBOBQQMJDBUJPOSFRVJSJOHFYUSFNFRVBMJUZBOE SFMJBCJMJUZ GPSFYBNQMF JOBIJHIMZTQFDJpDBQQMJDBUJPOXIFSFUIFGBJMVSFPSNJTPQFSBUJPOPGUIFQSPEVDUDPVMESFTVMUJO IVNBOJOKVSZPSEFBUI BJSDSBGU TQBDFWFIJDMF OVDMFBSSFBDUPSDPOUSPMTZTUFN USB⒏DDPOUSPMTZTUFN BVUPNPUJWFBOE USBOTQPSUBUJPOFRVJQNFOU DPNCVTUJPOFRVJQNFOU TBGFUZEFWJDFT MJGFTVQQPSUTZTUFNFUD TIPVMEpSTUDPOUBDUVT. 6.8FBSFNBLJOHPVSDPOUJOVPVTF⒎PSUUPJNQSPWFUIFRVBMJUZBOESFMJBCJMJUZPGPVSQSPEVDUT CVUTFNJDPOEVDUPSQSPEVDUT BSFMJLFMZUPGBJMXJUIDFSUBJOQSPCBCJMJUZ*OPSEFSUPQSFWFOUBOZJOKVSZUPQFSTPOTPSEBNBHFTUPQSPQFSUZSFTVMUJOHGSPN TVDIGBJMVSF DVTUPNFSTTIPVMECFDBSFGVMFOPVHIUPJODPSQPSBUFTBGFUZNFBTVSFTJOUIFJSEFTJHO TVDIBTSFEVOEBODZ GFBUVSF pSFDPOUBJONFOUGFBUVSFBOEGBJMTBGFGFBUVSF8FEPOPUBTTVNFBOZMJBCJMJUZPSSFTQPOTJCJMJUZGPSBOZMPTTPS EBNBHFBSJTJOHGSPNNJTVTFPSJOBQQSPQSJBUFVTFPGUIFQSPEVDUT. 7."OUJSBEJBUJPOEFTJHOJTOPUJNQMFNFOUFEJOUIFQSPEVDUTEFTDSJCFEJOUIJTEPDVNFOU 8.5IF9SBZFYQPTVSFDBOJOqVFODFGVODUJPOTBOEDIBSBDUFSJTUJDTPGUIFQSPEVDUT$POpSNUIFQSPEVDUGVODUJPOTBOE DIBSBDUFSJTUJDTJOUIFFWBMVBUJPOTUBHF. 9.8-$41QSPEVDUTTIPVMECFVTFEJOMJHIUTIJFMEFEFOWJSPONFOUT5IFMJHIUFYQPTVSFDBOJOqVFODFGVODUJPOTBOE DIBSBDUFSJTUJDTPGUIFQSPEVDUTVOEFSPQFSBUJPOPSTUPSBHF. 10.5IFSFDBOCFWBSJBUJPOJOUIFNBSLJOHXIFOEJ⒎FSFOU"0* "VUPNBUFE0QUJDBM*OTQFDUJPO FRVJQNFOUJTVTFE*OUIFDBTF PGSFDPHOJ[JOHUIFNBSLJOHDIBSBDUFSJTUJDXJUI"0*,QMFBTFDPOUBDUourTBMFTPSPVSEJTUSJCVUPSCFGPSFBUUFNQUJOHUPVTF "0*. 11.1MFBTFDPOUBDUourTBMFTSFQSFTFOUBUJWFTTIPVMEZPVIBWFBOZRVFTUJPOTPSDPNNFOUTDPODFSOJOHUIFQSPEVDUTPS UIFUFDIOJDBMJOGPSNBUJPO. Official website https://www.nisshinbo-microdevices.co.jp/en/ Purchase information https://www.nisshinbo-microdevices.co.jp/en/buy/