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www.sii-ic.com STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR © SII Semiconductor Corporation, 2002-2010 Rev.3.0_01 The S-8353/8354 Series is a CMOS step-up sw itching regulator which mainly consis ts of a reference voltage source, an oscillation circuit, a power MOS FET, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8353 Series) and a PWM / PFM switching control circuit (S-8354 Series). The S-8353/8354 Series can confi gure the step-up switching regul ator with an external coil, capacitor, and diode. In addition to the above features, the sma ll package and low current consumption make the S-8353/8354 Series ideal for portable equipment applications requiring high efficiency. The S-8353 Series realizes low ripple, high efficiency, and excell ent transient characteristics due to its PWM control circuit whose duty ratio can be varied linearly from 0% to 83% (fro m 0% to 78% for 250 kHz models), an excellently designed error amplifier, and phase compensation circuits. The S-8354 Series features a PWM / PFM switching controller t hat can switch the operation to a PFM controller with a duty ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current. Features
- Low voltage operation: Startup at 0.9 V min. (IOUT = 1 mA) guaranteed
- Low current consumption : During operation 18.7 μA (3.3 V, 50 kHz, typ.) During shutdown: 0.5 μA (max.)
- Duty ratio : Built-in PWM / PFM switching control circuit (S-8354 Series) 15 % to 83 % (30 kHz and 50 kHz models) 15 % to 78 % (250 kHz models)
- External parts : Coil, capacitor, and diode
- Output voltage : Selectable in 0.1 V steps between 1.5 V and 6.5 V (for V DD / VOUT separate types) Selectable in 0.1 V steps between 2.0 V and 6.5 V (for other than VDD / VOUT separate types)
- Output voltage accuracy : ±2.4%
- Oscillation frequency : 30 kHz, 50 kHz, and 250 kHz selectable
- Soft start function : 6 ms (50 kHz, typ.)
- Lead-free, Sn 100%, halogen-free*1 *1. Refer to “ Product Name Structure” for details. Applications
- Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs
- Power supplies for audio equipment such as portable CD / MD players
- Constant voltage power supplies for cameras, VCRs, and communication devices
- Power supplies for microcomputers Packages
- SOT-23-3
- SOT-23-5
- SOT-89-3
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series Product Name Structure The control system, product types, out put voltage, and packages for the S-8353/ 8354 Series can be selected at the user’s request. Please refer to the “3. Product Name ” for the definition of the product name, “4. Package ” regarding the package drawings and “5. Product Name List ” for the full product names. 1. Function List (1) PWM Control Products Table 1 Product Name Switching Frequency [kHz] Shutdown Function VDD / VOUT Separate Type Package Application S-8353AxxMC 50 Yes − SOT-23-5 Applications requiring shutdown function S-8353AxxMA 50 − − SOT-23-3 Applications not requiring shutdown function S-8353AxxUA 50 − − SOT-89-3 Applications not requiring shutdown function S-8353CxxMA 30 − − SOT-23-3 For pager S-8353CxxUA 30 − − SOT-89-3 For pager S-8353DxxMC 50 − Yes SOT-23-5 Applications requiring variable output voltage with an external resistor S-8353HxxMC 250 Yes − SOT-23-5 Applications requiring a shutdown function and a thin coil S-8353HxxMA 250 − − SOT-23-3 Applications not requiring a shutdown function and requiring a thin coil S-8353HxxUA 250 − − SOT-89-3 Applications not requiring a shutdown function and requiring a thin coil S-8353JxxMC 250 − Yes SOT-23-5 Applications requiring variable output voltage with an external resistor and a thin coil (2) PWM / PFM Switching Control Products Table 2 Product Name Switching Frequency [kHz] Shutdown Function VDD / VOUT Separate Type Package Application S-8354AxxMC 50 Yes − SOT-23-5 Applications requiring shutdown function S-8354AxxMA 50 − − SOT-23-3 Applications not requiring shutdown function S-8354AxxUA 50 − − SOT-89-3 Applications not requiring shutdown function S-8354CxxMA 30 − − SOT-23-3 For pager S-8354DxxMC 50 − Yes SOT-23-5 Applications requiring variable output voltage with an external resistor S-8354HxxMC 250 Yes − SOT-23-5 Applications requiring a shutdown function and a thin coil S-8354HxxMA 250 − − SOT-23-3 Applications not requiring a shutdown function and requiring a thin coil S-8354HxxUA 250 − − SOT-89-3 Applications not requiring a shutdown function and requiring a thin coil S-8354JxxMC 250 − Yes SOT-23-5 Applications requiring variable output voltage with an external resistor and a thin coil
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 2. Package and Function List by Product Type Table 3 Series Name Type Package Name (Abbreviation) Shutdown Function Yes / No VDD / VOUT Separate Type Yes / No S-8353 Series, S-8354 Series A (Normal product or with shutdown function) A = 50 kHz MC Yes No MA / UA No C (Normal product) C = 30 kHz MA No No D (VDD / VOUT separate type) D = 50 kHz MC No Yes H (Normal product or with shutdown function) H = 250 kHz MC Yes No MA / UA No J (VDD / VOUT separate type) J = 250 kHz MC No Yes 3. Product Name (1) SOT-23-3 S-835 x x xx MA - xxx xx x Environmental code U : Lead-free (Sn 100%), halogen-free G : Lead-free (for details, please contact our sales office) IC direction in tape specifications *1 T1 : Product of environmental code = U T2 : Product of environmental code = G Product code *2 Package code MA : SOT-23-3 Output voltage 15 to 65 (e.g. When the output voltage is 1.5 V, it is expressed as 15.) Product type A : Normal products (SOT-23-3, SOT-89-3) or With shutdown function products (SOT-23-5), f OSC = 50 kHz C : Normal products, f OSC = 30 kHz D : V DD / VOUT separate type, f OSC = 50 kHz H : Normal products (SOT-23-3, SOT-89-3) or With shutdown function products (SOT-23-5), f OSC = 250 kHz J : V DD / VOUT separate type, f OSC = 250 kHz Control system 3 : PWM control 4 : PWM / PFM switching control *1. Refer to the tape specifications. *2. Refer to the Table 4 to Table 8 in the “5. Product Name List ”.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series (2) SOT-23-5, SOT-89-3 S-835 x x xx xx - xxx T2 x Environmental code U : Lead-free (Sn 100%), halogen-free G : Lead-free (for details, please contact our sales office) IC direction in tape specifications *1 Product code *2 Package code MC : SOT-23-5 UA : SOT-89-3 Output voltage 15 to 65 (e.g. When the output voltage is 1.5 V, it is expressed as 15.) Product type A : Normal products (SOT-23-3, SOT-89-3) or With shutdown function products (SOT-23-5), f OSC = 50 kHz C : Normal products, f OSC = 30 kHz D : V DD / VOUT separate type, f OSC = 50 kHz H : Normal products (SOT-23-3, SOT-89-3) or With shutdown function products (SOT-23-5), f OSC = 250 kHz J : V DD / VOUT separate type, f OSC = 250 kHz Control system 3 : PWM control 4 : PWM / PFM switching control *1. Refer to the tape specifications. *2. Refer to the Table 4 to Table 8 in the “5. Product Name List ”. 4. Package Package Name Drawing Code Package Tape Reel SOT-23-3 Environmental code = G MP003-A-P- SD MP003-A-C-SD MP003-A-R-SD Environmental code = U MP003-C-P- SD MP003-C-C-SD MP003-Z-R-SD SOT-23-5 MP005-A-P-SD MP005-A-C-SD MP005-A-R-SD SOT-89-3 UP003-A-P-SD UP 003-A-C-SD UP003-A-R-SD
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 5. Product Name List (1) S-8353 Series Table 4 Output voltage S-8353AxxMC Series S-8353AxxMA Series S-8353AxxUA Series S-8353CxxMA Series
2.0 V S-8353A20MC-IQFT2x − − −
2.5 V S-8353A25MC-IQKT2x − − −
2.7 V S-8353A27MC-IQMT2x − − −
2.8 V S-8353A28MC-IQNT2x − − −
3.0 V S-8353A30MC-IQPT2x S-8353A30MA-IQPT S-8353A30UA-IQPT2x S-8353C30MA-ISPT
3.3 V S-8353A33MC-IQST2x S-8353A33MA-IQST S-8353A33UA-IQST2x −
3.5 V S-8353A35MC-IQUT2x − − −
3.6 V − − S-8353A36UA-IQVT2x −
3.8 V S-8353A38MC-IQXT2x − S-8353A38UA-IQXT2x −
4.0 V − − S-8353A40UA-IQZT2x −
4.5 V S-8353A45MC-IRET2x − − −
4.6 V − − − S-8353C46MA-ITFT
5.0 V S-8353A50MC-IRJT2x S-8353A50MA-IRJT S-8353A50UA-IRJT2x −
5.5 V S-8353A55MC-IROT2x − S-8353A55UA-IROT2x −
2.0 V − S-8353D20MC-IUFT2x S-8353H20MC-IWFT2x −
2.6 V − − S-8353H26MC-IWLT2x −
2.8 V − − S-8353H28MC-IWNT2x −
3.0 V S-8353C30UA-ISPT2x S-8353D30MC-IUPT 2x S-8353H30MC-IWPT2x S-8353H30MA-IWPT
3.1 V − − S-8353H31MC-IWQT2x −
3.2 V − − S-8353H32MC-IWRT2x −
3.3 V − − S-8353H33MC-IWST2x S-8353H33MA-IWST
3.5 V − − S-8353H35MC-IWUT2x −
3.7 V − − S-8353H37MC-IWWT2x −
3.8 V − − S-8353H38MC-IWXT2x −
4.0 V − − S-8353H40MC-IWZT2x −
4.5 V − − S-8353H45MC-IXET2x −
5.0 V − S-8353D50MC-IVJT2x S-8353H50MC-IXJT2x −
6.0 V − − S-8353H60MC-IXTT2x −
6.5 V − − S-8353H65MC-IXYT2x −
Remark 1. Please contact the SII Semiconductor Corporation mark eting department for products with an output voltage other than those specified above. 2. x: G or U 3. : 2G or 1U 4. Please select products of environmental code = U for Sn 100%, halogen-free products.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series Table 6 Output voltage S-8353HxxUA Series S-8353JxxMC Series
1.8 V − S-8353J18MC-IYDT2x
2.0 V − S-8353J20MC-IYFT2x
2.1 V − S-8353J21MC-IYGT2x
2.5 V − S-8353J25MC-IYKT2x
3.0 V − S-8353J30MC-IYPT2x
3.3 V S-8353H33UA-IWST2x S-8353J33MC-IYST2x
3.6 V S-8353H36UA-IWVT2x −
5.0 V S-8353H50UA-IXJT2x S-8353J50MC-IZJT2x
(2) S-8354 Series Table 7 Output voltage S-8354AxxMC Series S-8354AxxMA Series S-8354AxxUA Series S-8354CxxMA Series
2.0 V − S-8354A20MA-JQFT − −
2.7 V S-8354A27MC-JQMT 2x S-8354A27MA-JQMT − −
2.8 V − S-8354A28MA-JQNT S-8354A28UA-JQNT2x −
3.0 V S-8354A30MC-JQPT 2x S-8354A30MA-JQPT S-8354A30UA-JQPT2x S-8354C30MA-JSPT
3.3 V S-8354A33MC-JQST 2x S-8354A33MA-JQST S-8354A33UA-JQST2x −
3.5 V − − S-8354A35UA-JQUT2x −
3.8 V S-8354A38MC-JQXT2x − − −
4.0 V S-8354A40MC-JQZT2x − S-8354A40UA-JQZT2x −
5.0 V S-8354A50MC-JRJT2x S-8354A50MA-JRJT S-8354A50UA-JRJT2x −
1.5 V − − − S-8354J15MC-JYAT2x
2.0 V S-8354D20MC-JUFT2x − − S-8354J20MC-JYFT2x
2.5 V − S-8354H25MC-JWKT2x − −
2.7V − S-8354H27MC-JWMT2x S-8354H27UA-JWMT2x −
3.0 V S-8354D30MC-JUPT2x S-8354H30MC-JWPT2x − S-8354J30MC-JYPT2x
3.1 V − S-8354H31MC-JWQT2x − −
3.3 V S-8354D33MC-JUST2x S-8354H33MC-JWST2x − S-8354J33MC-JYST2x
3.5 V − S-8354H35MC-JWUT2x − −
4.0 V − S-8354H40MC-JWZT2x − −
4.2 V − S-8354H42MC-JXBT2x − −
4.5 V − S-8354H45MC-JXET2x − −
4.7 V − S-8354H47MC-JXGT2x − −
5.0 V − S-8354H50MC-JXJT2x − S-8354J50MC-JZJT2x
Remark 1. Please contact the SII Semiconductor Corporation mark eting department for products with an output voltage other than those specified above. 2. x: G or U 3. : 2G or 1U 4. Please select products of environmental code = U for Sn 100%, halogen-free products.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 Pin Configurations 2 3 SOT-23-3 Top view Figure 4 Table 9 A, C and H Types (Without shutdown function, VDD / VOUT non-separate type) Pin No. Symbol Description
1 VOUT Output voltage pin and IC power supply pin
2 VSS GND pin
3 CONT External inductor connection pin
(With shutdown function, VDD / VOUT non-separate type) Pin No. Symbol Description
1 OFF/ON
“H”: Normal operation (Step-up operating) “L”: Step-up stopped (Entire circuit stopped)
2 VOUT Output voltage pin and IC power supply pin
3 NC*1 No connection
4 VSS GND pin
5 CONT External inductor connection pin
Figure 5 *1. The NC pin indicates electrically open. Table 11 D and J Types (Without shutdown function, VDD / VOUT separate type) Pin No. Symbol Description
1 VOUT Output voltage pin
2 VDD IC power supply pin
*1. The NC pin indicates electrically open. SOT-89-3 Top view 3 2 1 Figure 6 Table 12 A and H Types (Without shutdown function, VDD / VOUT non-separate type) Pin No. Symbol Description
1 VSS GND pin
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series Absolute Maximum Ratings Table 13 (Ta = 25°C unless otherwise specified) Item Symbol Absolute maximum rating Unit VOUT pin voltage V OUT V SS − 0.3 to VSS + 12 V OFF/ON pin voltage *1 OFF/ONV VSS − 0.3 to VSS + 12 V VDD pin voltage*2 VDD V SS − 0.3 to VSS + 12 V CONT pin voltage V CONT V SS − 0.3 to VSS + 12 V CONT pin current I CONT 300 mA Power dissipation SOT-23-3 PD 150 (When not mounted on board) mW 430*3 mW SOT-23-5 250 (When not mounted on board) mW 600*3 mW SOT-89-3 500 (When not mounted on board) mW 1000*3 mW Operating ambient temperature T opr −40 to + 85 °C Storage temperature T stg −40 to + 125 °C *1. With shutdown function *2. For VDD / VOUT separate type *3. When mounted on board [Mounted board] (1) Board size : 114.3 mm × 76.2 mm × t1.6 mm (2) Board name : JEDEC STANDARD51-7 Caution The absolute maximum ra tings are rated values exceeding whic h the product could suffer physical damage. These values must therefor e not be exceeded under any conditions. (1) When mounted on board (2) When not mounted on board 0 50 100 150 800 400 Power dissipation (PD) [mW] Ambient temperature (Ta) [°C] 1000 600 200 1200 SOT-23-3 SOT-23-5 SOT-89-3 0 50 100 150 400 200 Power dissipation (PD) [mW] Ambient temperature (Ta) [°C] 500 300 100 600 SOT-23-3 SOT-23-5 SOT-89-3 Figure 7 Power Dissipation of Packages
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 Electrical Characteristics (1) 50 kHz Product (A and D Types) Table 14 (Ta = 25°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Measurement circuit Output voltage V OUT − VOUT(S) × 0.976 VOUT(S) VOUT(S) × 1.024 V 2 Input voltage V IN − − − 10 V 2 Operation start voltage V ST1 I OUT = 1 mA − − 0.9 V 2 Oscillation start voltage V ST2 No external parts, Voltage applied to V OUT − − 0.8 V 1 Operation holding voltage V HLD IOUT = 1 mA, Judged by decreasing VIN voltage gradually 0.7 − − V 2 Current consumption 1 I SS1 V OUT = VOUT(S) × 0.95 S-835xx15 to 19 − 10.8 18.0 μA 1 S-835xx20 to 29 − 13.3 22.2 μA 1 S-835xx30 to 39 − 18.7 31.1 μA 1 S-835xx40 to 49 − 24.7 41.1 μA 1 S-835xx50 to 59 − 31.0 51.6 μA 1 S-835xx60 to 65 − 37.8 63.0 μA 1 Current consumption 2 I SS2 V OUT = VOUT(S) + 0.5 V S-835xx15 to 19 − 4.8 9.5 μA 1 S-835xx20 to 29 − 5.0 9.9 μA 1 S-835xx30 to 39 − 5.1 10.2 μA 1 S-835xx40 to 49 − 5.3 10.6 μA 1 S-835xx50 to 59 − 5.5 10.9 μA 1 S-835xx60 to 65 − 5.7 11.3 μA 1 Current consumption during shutdown (With shutdown function) I SSS OFF/ONV = 0 V − − 0.5 μA 1 Switching current I SW V CONT = 0.4 V S-835xx15 to 19 80 128 − mA 1 S-835xx20 to 24 103 165 − mA 1 S-835xx25 to 29 125 200 − mA 1 S-835xx30 to 39 144 231 − mA 1 S-835xx40 to 49 176 282 − mA 1 S-835xx50 to 59 200 320 − mA 1 S-835xx60 to 65 215 344 − mA 1 Switching transistor leakage current ISWQ V CONT = VOUT = 10 V − − 0.5 μA 1 Line regulation ΔVOUT1 V IN = VOUT(S) × 0.4 to × 0.6 − 30 60 mV 2 Load regulation ΔVOUT2 I OUT = 10 μA to VOUT(S) / 250 × 1.25 − 30 60 mV 2 Output voltage temperature coefficient OUT OUT VTa∆ Ta = −40°C to +85°C − ±50 − ppm / °C 2 Oscillation frequency f OSC V OUT = VOUT(S) × 0.95 42.5 50 57.5 kHz 1 Maximum duty ratio MaxDuty V OUT = VOUT(S) × 0.95 75 83 90 % 1 PWM / PFM switching duty ratio (For S-8354 Series) PFMDuty V IN = VOUT(S) − 0.1 V, No-load 10 15 24 % 1 OFF/ON pin input voltage (With shutdown function) VSH Measured oscillation at CONT pin 0.75 − − V 1 VSL1 Judged oscillation stop at CONT pin At VOUT≥1.5 V − − 0.3 V 1 VSL2 At V OUT<1.5 V − − 0.2 V 1 OFF/ON pin input current (With shutdown function) ISH OFF/ONV = VOUT(S) × 0.95 − 0.1 − 0.1 μA 1 ISL OFF/ONV = 0 V − 0.1 − 0.1 μA 1 Soft start time t SS − 3.0 6.0 12.0 ms 2 Efficiency EFFI − − 85 − % 2
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series External parts Coil: CDRH6D28-101 of Sumida Corporation Diode: MA2Z748 (Shottky type) of Mats ushita Electric Industrial Co., Ltd. Capacitor: F93 (16 V, 22 μF tantalum type) of Nichicon Corporation VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 250 Ω With shutdown function : OFF/ON pin is connected to V OUT For VDD / VOUT separate type : VDD pin is connected to VOUT pin Remark 1. V OUT(S) specified above is the set output voltage value, and V OUT is the typical value of the actual output voltage. 2. VDD / VOUT separate type A step-up operation is performed from VDD = 0.8 V. However, 1.8 V ≤VDD≤10 V is recommended stabilizing the output voltage and oscillation frequency. (V DD≥1.8 V must be applied for products with a set value of less than 1.9 V.)
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 (2) 30 kHz Product (C Type) Table 15 (Ta = 25°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Measurement circuit Output voltage V OUT − VOUT(S) × 0.976 VOUT(S) VOUT(S) × 1.024 V 2 Input voltage V IN − − − 10 V 2 Operation start voltage V ST1 I OUT = 1 mA − − 0.9 V 2 Oscillation start voltage V ST2 No external parts, Voltage applied to V OUT − − 0.8 V 1 Operation holding voltage V HLD IOUT = 1 mA, Judged by decreasing VIN voltage gradually 0.7 − − V 2 Current consumption 1 I SS1 V OUT = VOUT(S) × 0.95 S-835xx20 to 29 − 9.8 16.4 μA 1 S-835xx30 to 39 − 13.1 21.9 μA 1 S-835xx40 to 49 − 16.8 28.0 μA 1 S-835xx50 to 59 − 20.7 34.5 μA 1 S-835xx60 to 65 − 24.8 41.4 μA 1 Current consumption 2 I SS2 V OUT = VOUT(S) + 0.5 V S-835xx20 to 29 − 435 9.0 μA 1 S-835xx30 to 39 − 4.7 9.4 μA 1 S-835xx40 to 49 − 4.9 9.7 μA 1 S-835xx50 to 59 − 5.1 10.1 μA 1 S-835xx60 to 65 − 5.2 10.4 μA 1 Switching current I SW V CONT = 0.4 V S-835xx20 to 24 52 83 − mA 1 S-835xx25 to 29 62 100 − mA 1 S-835xx30 to 39 72 115 − mA 1 S-835xx40 to 49 88 141 − mA 1 S-835xx50 to 59 100 160 − mA 1 S-835xx60 to 65 108 172 − mA 1 Switching transistor leakage current ISWQ V CONT = VOUT = 10 V − − 0.5 μA 1 Line regulation ΔVOUT1 V IN = VOUT(S) × 0.4 to × 0.6 − 30 60 mV 2 Load regulation ΔVOUT2 I OUT = 10 μA to VOUT(S) / 250 × 1.25 − 30 60 mV 2 Output voltage temperature coefficient OUT OUT VTa∆ Ta = −40°C to +85°C − ±50 − ppm / °C 2 Oscillation frequency f OSC V OUT = VOUT(S) × 0.95 25 30 35 kHz 1 Maximum duty ratio MaxDuty V OUT = VOUT(S) × 0.95 75 83 90 % 1 PWM / PFM switching duty ratio (For S-8354 Series) PFMDuty V IN = VOUT(S) − 0.1 V, No-load 10 15 24 % 1 Soft start time t SS − 3.0 6.0 12.0 ms 2 Efficiency EFFI − − 84 − % 2 External parts Coil: CDRH6D28-101 of Sumida Corporation Diode: MA2Z748 (Shottky type) of Mats ushita Electric Industrial Co., Ltd. Capacitor: F93 (16 V, 22 μF tantalum type) of Nichicon Corporation VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 250 Ω Remark VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output voltage.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series (3) 250 kHz Product (H and J Types) Table 16 (Ta = 25°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Measurement circuit Output voltage V OUT − VOUT(S) × 0.976 VOUT(S) VOUT(S) × 1.024 V 2 Input voltage V IN − − − 10 V 2 Operation start voltage V ST1 I OUT = 1 mA − − 0.9 V 2 Oscillation start voltage V ST2 No external parts, Voltage applied to V OUT − − 0.8 V 1 Operation holding voltage V HLD IOUT = 1 mA, Judged by decreasing VIN voltage gradually 0.7 − − V 2 Current consumption 1 I SS1 V OUT = VOUT(S) × 0.95 S-835xx15 to 19 − 36.5 60.8 μA 1 S-835xx20 to 29 − 48.3 80.5 μA 1 S-835xx30 to 39 − 74.3 123.8 μA 1 S-835xx40 to 49 − 103.1 171.9 μA 1 S-835xx50 to 59 − 134.1 223.5 μA 1 S-835xx60 to 65 − 167.0 278.4 μA 1 Current consumption 2 I SS2 V OUT = VOUT(S) + 0.5 V S-835xx15 to 19 − 9.1 18.2 μA 1 S-835xx20 to 29 − 9.3 18.6 μA 1 S-835xx30 to 39 − 9.5 18.9 μA 1 S-835xx40 to 49 − 9.7 19.3 μA 1 S-835xx50 to 59 − 9.8 19.6 μA 1 S-835xx60 to 65 − 10.0 19.9 μA 1 Current consumption during shutdown (With shutdown function) I SSS OFF/ONV = 0 V − − 0.5 μA 1 Switching current I SW V CONT = 0.4 V S-835xx15 to 19 80 128 − mA 1 S-835xx20 to 24 103 165 − mA 1 S-835xx25 to 29 125 200 − mA 1 S-835xx30 to 39 144 231 − mA 1 S-835xx40 to 49 176 282 − mA 1 S-835xx50 to 59 200 320 − mA 1 S-835xx60 to 65 215 344 − mA 1 Switching transistor leakage current ISWQ V CONT = VOUT = 10 V − − 0.5 μA 1 Line regulation ΔVOUT1 V IN = VOUT(S) × 0.4 to × 0.6 − 30 60 mV 2 Load regulation ΔVOUT2 I OUT = 10 μA to VOUT(S) / 250 × 1.25 − 30 60 mV 2 Output voltage temperature coefficient OUT OUT VTa V Δ Ta = −40°C to +85°C − ±50 − ppm / °C 2 Oscillation frequency f OSC V OUT = VOUT(S) × 0.95 212.5 250 287.5 kHz 1 Maximum duty ratio MaxDuty V OUT = VOUT(S) × 0.95 70 78 85 % 1 PWM / PFM switching duty ratio (For S-8354 Series) PFMDuty V IN = VOUT(S) − 0.1 V, No-load 10 15 24 % 1 OFF/ON pin input voltage (With shutdown function) VSH Measured oscillation at CONT pin 0.75 − − V 1 VSL1 Judged oscillation stop at CONT pin At VOUT≥1.5 V − − 0.3 V 1 VSL2 At V OUT<1.5 V − − 0.2 V 1 OFF/ON pin input current (With shutdown function) ISH OFF/ONV = VOUT(S) × 0.95 − 0.1 − 0.1 μA 1 ISL OFF/ONV = 0 V − 0.1 − 0.1 μA 1 Soft start time t SS − 1.8 3.6 7.2 ms 2 Efficiency EFFI − − 85 − % 2
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 External parts Coil: CDRH6D28-220 of Sumida Corporation Diode: MA2Z748 (Shottky type) of Mats ushita Electric Industrial Co., Ltd. Capacitor: F93 (16 V, 22 μF tantalum type) of Nichicon Corporation VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 250 Ω With shutdown function : OFF/ON pin is connected to V OUT For VDD / VOUT separate type : VDD pin is connected to VOUT pin Remark 1. V OUT(S) specified above is the set output voltage value, and V OUT is the typical value of the actual output voltage. 2. VDD / VOUT separate type A step-up operation is performed from V DD = 0.8 V. However, 1.8 V ≤VDD≤10 V is recommended stabilizing the output voltage and oscillation frequency. (V DD≥1.8 V must be applied for products with a set value of less than 1.9 V.)
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 Operation 1. Switching Control Types 1. 1 PWM Control (S-8353 Series) The S-8353 Series is a DC-DC converter using a pulse width modulation method (PWM) and features low current consumption. In conventional PFM DC-DC converters, pulses are skipped w hen the output load current is low, causing a fluctuation in the ripple frequency of the output voltage, resulting in an increase in the ripple voltage. In the S-8353 Series, the switching frequency does not change, although the pulse width changes from 0% to 83% (78% for H and J type) corresponding to each load current. The ripple voltage generated from switching can thus be removed easily using a filter because the switching frequency is constant. 1. 2 PWM / PFM Switching Control (S-8354 Series) The S-8354 Series is a DC-DC converter that automatic ally switches between a pulse width modulation method (PWM) and a pulse frequency modulation method (PFM), depending on the load current, and features low current consumption. The S-8354 Series operates under PWM control with the pulse width duty changing from 15% to 83% (78% for H and J type) in a high output load current area. On t he other hand, the S-8354 Series operates under PFM control with the pulse width duty fixed at 15% in a low output load current area, and pulses are skipped according to the load current. The oscillation circuit thus oscillates intermittently so that the resultant lower self current consumption can prevent a r eduction in the efficiency at a low load current. The switching point from PWM control to PFM control depends on the external devices (coil, diode, etc.), input voltage, and output voltage. This series are an especially efficient DC-DC converter at an output current around 100 μA. 2. Soft Start Function For this IC, a built-in soft start circuit controls the rush current and overshoot of the output voltage when the power is turned on or the OFF/ON pin is set to “H” level.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series 3. OFF/ON Pin (Shutdown Pin) (SOT-23-5 Package Products of A and H Types) OFF/ON pin stops or starts step-up operation. Setting the OFF/ON pin to the “L” level stops operation of all the internal circuits and reduces the current consumption significantly. DO NOT use the OFF/ON pin in a floating state because it has the structure shown in Figure 10 and is not pulled up or pulled down internally. DO NOT apply a voltage of between 0.3 V and 0.75 V to the OFF/ON pin because applying such a voltage increases the current consumption. If the OFF/ON pin is not used, connect it to the VOUT pin. The OFF/ON pin does not have hysteresis. Table 17 OFF/ON pin CR oscillation circuit Output voltage “H” Operation Fixed “L” Stop ≅VIN*1 *1. Voltage obtained by subtracting the voltage drop due to the DC resistance of the inductor and the diode forward voltage from VIN. VSS VOUT OFF/ON Figure 10 OFFON/ Pin Structure
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 4. Operation The following are the basic equations [(1) through (7)] of the step-up switching regulator. (Refer to Figure 11.) CL M1 D VOUT CONT VIN L EXT VSS Figure 11 Step-Up Switching Regulator Circuit for Basic Equation Voltage at CONT pin at the moment M1 is turned ON (VA) *1 : VA = VS *2 (1) *1. Current flowing through L (IL) is zero. *2. Non-saturated voltage of M1. The change in IL over time : L VV L V dt dI SINLL −== (2) Integration of equation (2) (IL) : t L VVI SIN L • −= (3) IL flows while M1 is ON (tON). The time of t ON is determined by the oscillation frequency of OSC. The peak current (IPK) after tON : ON SIN PK tL VVI • −= (4) The energy stored in L is represented by 1/2 • L (IPK)2. When M1 is turned OFF (tOFF), the energy stored in L is emitted through a diode to the output capacitor. Then, the reverse voltage (VL) is generated : VL = (VOUT + VD*1) − VIN (5) *1. Diode forward voltage The voltage at CONT pin rises only by VOUT+VD. The change in the current (IL) flowing through the diode into VOUT during tOFF : L VVV L V dt dI INDOUTLL −+== (6)
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series Integration of the equation (6) is as follows : tL VVVII INDOUT PKL • −+−= (7) During tON, the energy is stored in L and is not transmitted to V OUT. When receiving the output current (I OUT) from VOUT, the energy of the capacitor (C L) is consumed. As a result, the pin voltage of C L is reduced, and goes to the lowest level after M1 is turned ON (t ON). When M1 is turned OFF, the energy stored in L is transmitted through the diode to CL, and the voltage of C L rises rapidly. V OUT is a time function, and therefore indicates the maximum value (ripple voltage (VP−P) ) when the current flowing through into VOUT and load current (IOUT) match. Next, the ripple voltage is determined as follows. IOUT vs. t1 (time) from when M1 is turned OFF (after tON) to when VOUT reaches the maximum level : INDOUT PKOUT tL VVVII • −+−= (8) −+•−=∴ INDOUT OUTPK1 VVV L)II(t (9) When M1 is turned OFF (tOFF), IL = 0 (when the energy of the inductor is completely transmitted). Based on equation (7) : PK OFF INDOUT I t VVV L = −+ (10) When substituting equation (10) for equation (9) : OFF PK OUT OFF1 tI Itt • −= (11) Electric charge ΔQ1 which is charged in CL during t1 : INDOUT 1PK INDOUT1t
0 PKL
L VVVtItdtL When substituting equation (12) for equation (9) : () 1 OUTPK 1OUTPKPK t2 IItII2 1I1Q •+=•−−=Δ (13) A rise in voltage (VP−P) due to ΔQ 1 : OUTPK LL PP t2 II C C Q∆V • +•==− (14) When taking into consideration IOUT to be consumed during t1 and the Equivalent Series Resistance (RESR) of CL : L 1OUT ESR OUTPKOUTPK LL PP C tIR2 II1t2 II C C QV •−• ++• +•=Δ=− (15) When substituting equation (11) for equation (15) : ESR OUTPK L OFF PK OUTPK PP R2 II C t )II(V • ++•−=− (16) Therefore to reduce the ripple voltage, it is important that the capacitor connected to the output pin has a large capacity and a small RESR.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 External Parts Selection The relationship between the major characteristics of the step-up circuit and the characteristic parameters of the external parts is shown in Figure 12. For larger output current ? For higher efficiency ? For smaller ripple voltage ? At PFM control At PWM control Smaller inductance Larger inductance Smaller direct current resistance of inductor Larger output capacitance Larger output capacitance Figure 12 Relationship between Major Characteristics of Step-up Circuit and External Parts 1. Inductor The inductance value (L value) has a strong influence on the maximum output current (IOUT) and efficiency (η). The peak current (IPK) increases by decreasing L value and the stability of the circuit improves and IOUT increases. If L value is decreased, the efficiency falls causing a decline in the current drive c apacity for the switching transistor, and IOUT decreases. The loss of I PK by the switching transistor decreases by incr easing L and the efficiency becomes maximum at a certain L value. Further increasing L value decreases the e fficiency due to the loss of the direct current resistance of the coil. I OUT also decreases. A higher oscillation frequency allows selection of a lower L value, making the coil smaller. The recommended inductances are a 47 μH to 220 μH for A, C, and D types, a 10 μH to 47 μH for H and J types. Be careful of the allowable inductor current when choosi ng an inductor. Exceeding the allowable current of the inductor causes magnetic saturation, much lower efficiency and destruction of the IC chip due to a large current. Choose an inductor so that IPK does not exceed the allowable current. I PK in discontinuous mode is calculated by the following equation: Lf )VVV(I 2I OSC INDOUT OUT PK −+= (A) (17) fosc = oscillation frequency, VD ≅ 0.4 V. 2. Diode Use an external diode that meets the following requirements :
- Low forward voltage : V F < 0.3 V
- High switching speed : 50 ns max.
- Reverse voltage : V OUT + VF or more
- Current rate : I PK or more
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series 3. Capacitor (C IN, CL) A capacitor on the input side (C IN) improves the efficiency by reducing the power impedance and stabilizing the input current. Select a CIN value according to the impedance of the power supply used. A capacitor on the output side (C L) is used for smoothing the output voltage. For step-up types, the output voltage flows intermittently to the load current, so step-up types need a larger capacitance than step-down types. Therefore, select an appropriate capacitor in accordance with the ri pple voltage, which increases in case of a higher output voltage or a higher load current. The capacitor value should be 10 μF or more. Select an appropriate capacitor the equivalent series resistance (R ESR) for stable output voltage. The stable voltage range in this IC depends on the R ESR. Although the inductance value (L value) is also a factor, an R ESR of 30 to 500 mΩ maximizes the characteristics. However, the best R ESR value may depend on the L value, the capacitance, the wiring, and the applications (output load). Therefore, fully evaluate the R ESR under the actual operating conditions to determine the best value. Refer to the “1. Example of Ceramic Capacitor Application ” (Figure 16) in the “ Application Circuit ” for the circuit example using a ceramic capacitor and the external resistance of the capacitor (RESR). 4. V DD / VOUT Separate Type (D and J Types) The D and J types provides separate internal circuit power supply (VDD pin) and output voltage setting pin (VOUT pin) in the IC, making it ideal for the following applications. (1) When changing the output voltage with external resistance. (2) When outputting a high voltage within the operating voltage (10 V). Choose the products in the Table 18 according to the applications (1) or (2) above. Table 18 Output voltage (VCC) 1.8 V ≤ VCC < 5 V 5 V ≤ VCC ≤ 10 V S-835xx18 Yes − S-835xx50 − Yes Connection to VDD pin V IN or VCC V IN Cautions 1. This IC starts a step-up operation at V DD = 0.8 V, but set 1.8 ≤ VDD ≤ 10 V to stabilize the output voltage and frequency of the oscillator. (Input a voltage of 1.8 V or more at the VDD pin for all products with a setting less than 1.9 V.) An input voltage of 1.8 V or more at the VDD pin allows connection of the VDD pin to either the input voltage VIN pin or output VOUT pin. 2. Choose external resistors R A and RB so as to not affect the output voltage, considering that there is impedance between the VOUT pin and VSS pin in the IC chip. The internal resistance between the VOUT pin and VSS pin is as follows : (1) S-835xx18 : 2.1 MΩ to 14.8 MΩ (2) S-835xx20 : 1.4 MΩ to 14.8 MΩ (3) S-835xx30 : 1.4 MΩ to 14.2 MΩ (4) S-835xx50 : 1.4 MΩ to 12.1 MΩ 3. Attach a capacitor (C C) in parallel to the RA resistance when an unstable event such as oscillation of the output voltage occurs. Calculate C C using the following equation : kHz 20R2 A C
- ••= π F
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series (3) S-8353DxxMC, S-8353JxxMC, S-8354DxxMC, S-8354JxxMC L SD VIN CIN VDD Soft start built-in reference power supply Phase compensating circuit Oscillation circuit PWM control circuit or PWM / PFM switching control circuit CONT VSS RB RA CC VOUT CL IC internal power supply Remark The power supply for the IC chip is from the VOUT pin. Figure 15 Caution The Above connection diagram will not guarantee successful operation. Perform through evaluation using the actual application to set the constant.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 Precautions
- Mount external capacitors, diodes, and coils as close as possible to the IC. Especially, mounting the output capacitor (capacitor between VDD pin and VSS pin for VDD / VOUT separate type) in the power supply line of the IC close to the IC can enable stable output characteristics. If it is impossibl e, it is recommended to mount and wire a ceramic capacitor of around 0.1 μF close to the IC.
- 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 coil, the capacitor and impedance of power supply used, fully check them using an actually mounted model.
- Make sure that the dissipation of the switching transis tor (especially at a high temperature) does not exceed the allowable power dissipation of the package.
- The performance of this IC varies depending on the design of the PCB patterns, peripheral circuits and external parts. Thoroughly test all settings with your device. The recomm ended external part should be used wherever possible, but if this is not possible for some reason, contact an SII Semiconductor Corporation sales person.
- Do not apply an electrostatic discharge to this IC that ex ceeds the performance ratings of the built-in electrostatic protection circuit.
- SII Semiconductor Corporation claims no responsibility for any and all disputes arising out of or in connection with any infringement of the products including this IC upon patents owned a third party.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series Application Circuits 1. Using Ceramic Capacitor Example When using small R ESR parts such as ceramic capacitors for the output capacitance, mount a resistor (R 1) corresponding to the RESR in series with the ceramic capacitor (CL) as shown in Figure 16. R1 differs depending on L value, the capacitance, the wiring, and the application (output load). The following example shows a circuit using R 1 = 100 m Ω, output voltage = 3.3 V, output load = 100 mA and its characteristics. CONT VOUT VSS VOUT SD CL L VIN CIN Figure 16 Using Ceramic Capacitor Circuit Example Table 19 IC L Type Name SD Type Name CL (Ceramic capacitor) R1 S-8353A33 CDRH5D28-101 MA2Z748 10 μF × 2 100 m Ω Caution The Above connection diag ram and constant will not guarantee successful operation. Perform through evaluation using the actual application to set the constant.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 2. Output Characteristics of The Us ing Ceramic Capacitor Circuit Example The data of the step-up characteristics (a) Output current (I OUT) vs. Efficiency ( η) characteristics, (b) Output current (IOUT) vs. Output voltage (V OUT) characteristics, (c) Output Current (I OUT) vs. Ripple voltage (V r) under conditions in Table 19 is shown below. (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) V IN = 1.8 V V IN = 2.7 V V IN = 0.9 V 100 0.01 0.1 1 10 100 1000 I OUT [mA] η [%] 3.20 3.25 3.30 3.35 3.40 0.01 0.1 1 10 100 1000 IOUT [mA] VOUT [V] VIN = 1.8 V VIN = 2.7 V VIN = 0.9 V (c) Output current (IOUT) vs. Ripple voltage (Vr) 100 120 0.01 0.1 1 10 100 1000 Vr [mV] IOUT [mA] 140 V IN = 1.8 V V IN = 2.7 V V IN = 0.9 V
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series Characteristics (Typical Data) 1. Example of Major Temperature characteristics (Ta = −40°C to +85°C, VOUT = 3.3 V) (1) Current Consumption 1 (ISS1) vs. Temperature (Ta) fOSC = 50 kHz f OSC = 250 kHz −40 −20 0 20 40 60 80 100 Ta [°C] ISS1 [μA] ISS1 [μA] −40 −20 0 20 40 60 80 100 Ta [°C] (2) Current Consumption 2 (ISS2) vs. Temperature (Ta) fOSC = 50 kHz f OSC = 250 kHz −40 −20 0 20 40 60 80 100 Ta [°C] ISS2 [μA] −40 −20 0 20 40 60 80 100 Ta [°C] ISS2 [μA] (3) Current Consumption at Shutdown (ISSS) vs. Temperature (Ta) fOSC = 250 kHz 0.2 0.4 0.6 0.8 1.0 −40 −20 0 20 40 60 80 100 Ta [°C] ISSS [μA] (4) Switching Current (ISW) vs. Temperature (Ta) (5) Switching Transistor Leakage Current (I SWQ) vs. Temperature (Ta) fOSC = 250 kHz f OSC = 250 kHz −40 −20 0 20 40 60 80 100 Ta [°C] ISW [mA] 100 200 300 400 500 0.2 0.4 0.6 0.8 1.0 −40 −20 0 20 40 60 80 100 Ta [°C] ISWQ [μA]
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 (6) Oscillation Frequency (fOSC) vs. Temperature (Ta) fOSC = 50 kHz f OSC = 250 kHz −40 −20 0 20 40 60 80 100 Ta [°C] fOSC [kHz] 150 200 250 300 350 −40 −20 0 20 40 60 80 100 fOSC [kHz] Ta [°C] (7) Maximum Duty Ratio (MaxDuty) vs. Temperature (Ta) fOSC = 50 kHz f OSC = 250 kHz −40 −20 0 20 40 60 80 100 Ta [°C] MaxDuty [%] 100 −40 −20 0 20 40 60 80 100 Ta [°C] MaxDuty [%] 100 (8) PWM / PFM Switching Duty Ratio (PFMDuty) vs. Temperature (Ta) (S-8354 Series) (9) OFF/ON Pin Input Voltage “H” (VSH) vs. Temperature (Ta) fOSC = 250 kHz f OSC = 250 kHz −40 −20 0 20 40 60 80 100 Ta [°C] PFMDuty [%] 0.2 0.4 0.6 0.8 1.0 −40 −20 0 20 40 60 80 100 Ta [°C] VSH [V] (10) OFF/ON Pin Input Voltage “L” 1 (VSL1) vs. Temperature (Ta) (S-8354 Series) (11) OFF/ON Pin Input Voltage “L” 2 (VSL2) vs. Temperatuer (Ta) fOSC = 250 kHz f OSC = 250 kHz 0.2 0.4 0.6 0.8 1.0 −40 −20 0 20 40 60 80 100 VSL1 [V] Ta [°C] 0.2 0.4 0.6 0.8 1.0 −40 −20 0 20 40 60 80 100 Ta [°C] VSL2 [V]
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series (12) Soft Start Time (tSS) vs. Temperature (Ta) fOSC = 50 kHz f OSC = 250 kHz −40 −20 0 20 40 60 80 100 Ta [°C] tSS [ms] −40 −20 0 20 40 60 80 100 tSS [ms] Ta [°C] (13) Operation Start Voltage (VST1) vs. Temperature (Ta) (14) Oscillation Start Voltage (VST2) vs. Temperature (Ta) fOSC = 250 kHz f OSC = 250 kHz 0.2 0.4 0.6 0.8 1.0 1.2 −40 −20 0 20 40 60 80 100 Ta [°C] VST1 [V] 0.2 0.4 0.6 0.8 1.0 1.2 −40 −20 0 20 40 60 80 100 Ta [°C] VST2 [V] (15) Output Voltage (VOUT) vs. Temperature (Ta) fOSC = 50 kHz f OSC = 250 kHz 3.20 3.25 3.30 3.35 3.40 −40 −20 0 20 40 60 80 100 Ta [°C] VOUT [V] 3.20 3.25 3.30 3.35 3.40 −40 −20 0 20 40 60 80 100 Ta [°C] VOUT [V]
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 2. Examples of Major Power Supply Dependence Characteristics (Ta = 25 °C) (1) Current Consumption 1 (ISS1) vs. Power Supply Voltage (VDD), Current Consumption 2 (ISS2) vs. Power Supply Voltage (VDD) VOUT = 3.3 V, fOSC = 50 kHz VOUT = 3.3 V, fOSC = 250 kHz 0 2 4 6 8 10 VDD [V] ISS1, ISS2 [μA] 100 0 2 4 6 8 10 VDD [V] ISS1, ISS2 [μA] (2) Oscillation Frequency (fOSC) vs. Power Supply Voltage (VDD) fOSC = 50 kHz f OSC = 250 kHz 0 2 4 6 8 10 VDD [V] fOSC [kHz] 100 150 200 250 300 0246 8 1 0 VDD [V] fOSC [kHz] (3) Switching Current (ISW) vs. Power Supply Voltage (VDD) 0 2 4 6 8 10 VDD [V] ISW [mA] 100 200 300 400 500 (4) Output Voltage (VOUT) vs. Power Supply Voltage (VDD) (VOUT = 3.3 V, VIN = 1.98 V, IOUT = 13.2 mA, VDD Separate Type) fOSC = 50 kHz f OSC = 250 kHz VDD [V] VOUT [V] 3.0 3.1 3.2 3.3 3.4 0 2 4 6 8 10 0246 8 1 0 VDD [V] VOUT [V] 3.0 3.1 3.2 3.3 3.4
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series 3. Output Waveforms (V IN = 1.98 V) (1) S-8353A33 IOUT = 10 mA I OUT = 50 mA t [10 μs / div] Output voltage [0.01 V / div] CONT voltage [1 V / div] t [10 μs / div] Output voltage [0.01 V / div] CONT voltage [1 V / div] IOUT = 100 mA t [10 μs / div] Output voltage [0.02 V / div ] CONT voltage [1 V / div] (2) S-8354H33 IOUT = 100 μA IOUT = 10 mA t [2 μs / div] Output voltage [0.01 V / div] CONT voltage [1 V / div] t [2 μs / div] Output voltage [0.01 V / div] CONT voltage [1 V / div] IOUT = 50 mA I OUT = 100 mA t [2 μs / div] Output voltage [0.02 V / div] CONT voltage [1 V / div] Output voltage [0.02 V / div] CONT voltage [1 V / div] t [2 μs / div]
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 4. Examples of Transient Response Characteristics (Ta = 25°C, 250 kHz, S-8354H33) (1) Power-On (VIN : 0 V → 2.0 V) IOUT = 1 mA I OUT = 50 mA t [1 ms / div] VIN [V] VOUT [V] 2VIN [V] VOUT [V] t [1 ms / div] (2) OFFON/ Pin Response ( OFF/ONV : 0 V → 2.0 V, VIN = 2 V) IOUT = 1 mA I OUT = 50 mA t [1 ms / div] VON/OFF [V] VOUT [V] VOUT [V] VON/OFF [V] t [1 ms / div] (3) Load Fluctuations (VIN = 1.98 V) 100 μA → 50 mA 50 mA → 100 μA VOUT [0.05 V / div] 100 μA IOUT t [200 μs / div] 50 mA VOUT [0.05 V / div] 100 μA IOUT 50 mA t [5 ms / div] (4) Input Voltage Fluctuations (IOUT = 50 mA) VIN = 1.98 V → 2.64 V V IN = 2.64 V → 1.98 V 1.98 2.64 VIN [V] t [100 μs / div] VOUT [0.02 V / div] VIN [V] t [100 μs / div] VOUT [0.04 V / div] 1.98 2.64
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series Reference Data Reference data is provided to determine specific external components. Therefore, the following data shows the characteristics of the recommended external components selected for various applications. 1. External Parts for Reference Data Table 20 Efficiency vs. Output Current Characteristics a nd Output Voltage vs. Output Current Characteristics for External Parts Condition Product Name Oscillation frequency Output voltage Control system Inductor Diode Output capacitor 1 S-8353H50MC 250 kHz 5.0 V PWM CDRH8D28-220 MA2Z748 F93 (16 V, 47 μF) 2 S-8353H50MC 250 kHz 5.0 V PWM CDRH5D28-220 F93 (6.3 V, 22 μF) 3 S-8353H50MC 250 kHz 5.0 V PWM CXLP120-220 F92 (6.3 V, 47 μF) 4 S-8354A50MC 50 kHz 5.0 V PWM / PFM CDRH8D28-101 F93 (6.3 V, 22 μF) 5 S-8354A50MC 50 kHz 5.0 V PWM / PFM CXLP120-470 F92 (6.3 V, 47 μF) 6 S-8353A50MC 50 kHz 5.0 V PWM CDRH8D28-101 F93 (6.3 V, 22 μF) 7 S-8353A50MC 50 kHz 5.0 V PWM CXLP120-470 F92 (6.3 V, 47 μF) 8 S-8353A33MC 50 kHz 3.3 V PWM CDRH8D28-101 F93 (6.3 V, 22 μF) The properties of the external parts are shown below. Table 21 Properties of External Parts Component Product name Manufacturer Characteristics Inductor CDRH8D28-220 Sumida Corporation 22 μH, DCR*1 = 95 mΩ, IMAX.*2 = 1.6 A, Component height = 3.0 mm CDRH8D28-101 100 μH, DCR*1 = 410 mΩ, IMAX.*2 = 0.75 A, Component height = 3.0 mm CDRH5D28-220 22 μH, DCR*1 = 122 mΩ, IMAX.*2 = 0.9 A, Component height = 3.0 mm CXLP120-220 Sumitomo Special Metals Co., Ltd. 22 μH, DCR*1 = 590 mΩ, IMAX.*2 = 0.55 A, Component height = 1.2 mm CXLP120-470 47 μH, DCR*1 = 950 mΩ, IMAX.*2 = 0.45 A, Component height = 1.2 mm Diode MA2Z748 Matsushita Electric Industrial Co., Ltd. VF*3 = 0.4 V, IF*4 = 0.3 A Capacitor F93 (16 V, 47 μF) Nichicon Corporation − F93 (6.3 V, 22 μF) F92 (6.3 V, 47 μF) *1. Direct current resistance *2. Maximum allowable current *3. Forward voltage *4. Forward current Caution The values shown in the characteristics column of Table 21 above are based on the materials provided by each manufacture. However, consider the characteristi cs of the original materials when using the above products.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 2. Output Current (I OUT) vs. Efficiency (η) Characteristics, Output Current (IOUT) vs. Output Voltage (VOUT) Characteristics The following shows the actual (a) Output current (IOUT) vs. Efficiency (η) characteristics and (b) Output current (IOUT) vs. Output voltage (VOUT) characteristics under the conditions of No. 1 to 8 in Table 20. Condition 1 S-8353H50MC (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) 100 η [%] IOUT [mA] 1 10 100 10000.1 0.01 VIN = 3 V VIN = 4 V VIN = 2 V 4.7 4.8 4.9 5.0 5.1 5.2 IOUT [mA] VOUT [V] 1 10 100 10000.10.01 VIN = 3 V VIN = 4 V VIN = 2 V Condition 2 S-8353H50MC (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) 100 η [%] IOUT [mA] 1 10 100 10000.1 0.01 VIN = 3 V VIN = 4 V VIN = 2 V 4.7 4.8 4.9 5.0 5.1 5.2 IOUT [mA] VOUT [V] 1 10 100 10000.10.01 VIN = 3 V VIN = 4 V VIN = 2 V Condition 3 S-8353H50MC (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) 100 η [%] IOUT [mA] 1 10 100 10000.1 0.01 VIN=3 V VIN=4 V VIN=2 V 4.7 4.8 4.9 5.0 5.1 5.2 IOUT [mA] VOUT [V] 1 10 100 10000.10.01 VIN = 3 V VIN = 4 V VIN = 2 V Condition 4 S-8354A50MC (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) 100 η [%] IOUT [mA] 1 10 100 10000.1 0.01 VIN = 3 V VIN = 4 V VIN = 2 V 4.7 4.8 4.9 5.0 5.1 5.2 IOUT [mA] VOUT [V] 1 10 100 10000.10.01 VIN = 3 V VIN = 4 V VIN = 2 V
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_01 S-8353/8354 Series Condition 5 S-8354A50MC (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) 100 η [%] IOUT [mA] 1 10 100 10000.1 0.01 V IN = 3 V V IN = 4 V V IN = 2 V 4.7 4.8 4.9 5.0 5.1 5.2 IOUT [mA] VOUT [V] 1 10 100 10000.10.01 VIN = 3 V VIN = 4 V VIN = 2 V Condition 6 S-8353A50MC (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) 100 η [%] IOUT [mA] 1 10 100 10000.1 0.01 VIN = 3 V VIN = 4 V VIN = 2 V 4.7 4.8 4.9 5.0 5.1 5.2 IOUT [mA] VOUT [V] 1 10 100 10000.10.01 VIN = 3 V VIN = 4 V VIN = 2 V Condition 7 S-8353A50MC (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) 100 η [%] IOUT [mA] 1 10 100 10000.1 0.01 V IN = 3 V V IN = 4 V V IN = 2 V 4.7 4.8 4.9 5.0 5.1 5.2 IOUT [mA] VOUT [V] 1 10 100 10000.10.01 VIN = 3 V VIN = 4 V VIN = 2 V Condition 8 S-8353A33MC (a) Output current (IOUT) vs. Efficiency (η) (b) Output current (I OUT) vs. Output voltage (VOUT) 100 η [%] IOUT [mA] 1 10 100 10000.1 0.01 V IN = 1.8 V V IN = 2.7 V V IN = 0.9 V 3.0 3.1 3.2 3.3 3.4 3.5 IOUT [mA] VOUT [V] 1 10 100 10000.10.01 VIN = 1.8 V VIN = 2.7 V VIN = 0.9 V
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR S-8353/8354 Series Rev.3.0_01 3. Output Current (I OUT) vs. Ripple Voltage (Vr) Characteristics The following shows the actual Output current (IOUT) vs. Ripple voltage (Vr) characteristics and (b) Output current (IOUT) vs. Output voltage (VOUT) characteristics under the conditions of No. 1 to 8 in Table 20. Condition 1 S-8353H50MC Condition 2 S-8353H50MC Vr [mV] IOUT [mA] 1 10 100 10000.1 0.01 100 V IN = 3 V V IN = 4 V V IN = 2 V IOUT [mA] Vr [mV] 1 10 100 10000.10.01 100 VIN = 3 V VIN = 4 V VIN = 2 V Condition 3 S-8353H50MC Condition 4 S-8354A50MC Vr [mV] IOUT [mA] 1 10 100 10000.1 0.01 120 160 200 V IN = 3 V V IN = 4 V V IN = 2 V IOUT [mA] Vr [mV] 1 10 100 10000.10.01 120 160 200 VIN = 3 V VIN = 4 V VIN = 2 V Condition 5 S-8354A50MC Condition 6 S-8353A50MC 120 160 200 240 280 IOUT [mA] 1 10 100 10000.1 0.01 Vr [mV] V IN = 3 V V IN = 4 V V IN = 2 V IOUT [mA] Vr [mV] 1 10 100 10000.10.01 120 160 200 VIN = 3 V VIN = 4 V VIN = 2 V Condition 7 S-8353A50MC Condition 8 S-8353A33MC 120 160 200 240 280 IOUT [mA] 1 10 100 10000.1 0.01 Vr [mV] V IN = 3 V V IN = 4 V V IN = 2 V IOUT [mA] Vr [mV] 1 10 100 10000.10.01 120 160 200 VIN = 3 V VIN = 4 V VIN = 2 V
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