S-8352 Seiko Instruments, S-8352 Datasheet
S-8352
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S-8352 Summary of contents
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... In addition to the above features, the small package and low current consumption, makes the S-8351 Series ideal for applications such as the power supply unit of portable equipment. The S-8352 Series, which features an external transistor, is suitable for applications requiring a high output current mA) guaranteed OUT µ ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER S-8351/8352 Series Block Diagrams 1. S-8351 Series (1) A Type (With Shutdown Function) (2) B and C Types (Without Shutdown Function, V www.DataSheet4U.com (3) D Type ( Separate Type) DD OUT 2 CONT IC internal power supply Protection circuit V REF ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER Rev.2.0 _00 2. S-8352 Series (1) A Type (With shutdown function) (2) B and C Type (Without Shutdown function, V www.DataSheet4U.com (3) D Type ( separate type) DD OUT IC internal power supply PFM + EXT control − circuit ON / OFF ...
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... S-8351DxxMC PFM (2) External Power MOS FET Type Duty Controll Product Name Ratio System S-8352AxxMC PFM www.DataSheet4U.com S-8352BxxMA PFM S-8352CxxMA PFM S-8352CxxUA PFM S-8352DxxMC PFM Table 1 Switching Shutdown ratio frequency function % kHz 100 Yes 100 − − 75 100 75 100 − ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER Rev.2.0 _00 2. Package and Function List by Product Type Series Name S-8351 Series, A (Duty ratio 50% / 75% auto-switching type) S-8352 Series A = 100 kHz B (Duty ratio 50% / 75% auto-switching type 100 kHz C (Duty ratio 75% fixed type 100 kHz D (Duty ratio 50% / 75% auto-switching type 100 kHz 3 ...
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... V 3.3 V S-8351A33MC-J2ST2G 3.5 V S-8351A35MC-J2UT2G 4.0 V S-8351A40MC-J2ZT2G − 4.5 V − 4.6 V 5.0 V S-8351A50MC-J3JT2G 5.5 V S-8351A55MC-J3OT2G Remark Please contact the SII marketing department for products with an output voltage other than those specified above. (2) S-8352 Series Output S-8352AxxMC voltage Series − 2.0 V 2.5 V S-8352A25MC-K2KT2G 3.0 V S-8352A30MC-K2PT2G 3.1 V − 3.2 V S-8352A32MC-K2RT2G www.DataSheet4U.com 3.3 V S-8352A33MC-K2ST2G 3 ...
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... Symbol 1 VOUT Output voltage pin and IC power supply pin 2 VSS GND pin 3 CONT External inductor connection pin (Open-drain output) Table 7 S-8352 Series B and C Types (Without shutdown function, V Pin No. Symbol 1 VOUT Output voltage pin and IC power supply pin 2 VSS GND pin External transistor connection pin (CMOS output) ...
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... Pin No. Symbol 1 VSS GND pin 2 VOUT Output voltage pin and IC power supply pin 3 CONT External inductor connection pin (Open-drain output) Table 13 S-8352 Series C Type (Without shutdown function, V Pin No. Symbol 1 VSS GND pin 2 VOUT Output voltage pin and IC power supply pin 3 EXT External transistor connection pin (CMOS output) Seiko Instruments Inc ...
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... Operating ambient temperature Storage temperature *1. With shutdown function *2. For separate type DD OUT Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. www.DataSheet4U.com Table 14 Symbol V OUT V ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER S-8351/8352 Series Electrical Characteristics (1) S-8351 Series Item Symbol Output voltage V OUT Input voltage V IN Operation start voltage V ST1 Oscillation start voltage V ST2 Input current during no- load I IN Current consumption 1 I SS1 ...
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... S-8351x30 S-8351x50 / 250 Ω OUT( OFF pin is connected to V OUT = 0.8 V. However, 1.8 V ≤ ≥ 1.8 V must be applied for products with a set value of less than DD Seiko Instruments Inc. S-8351/8352 Series ( ° C unless otherwise specified) Min. Typ. Max. Unit 0.75 − − V ≥1.5 V − ...
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... OFF − 0.4 V S-8352x15 to 19 EXT OUT S-8352x20 to 24 S-8352x25 to 29 S-8352x30 to 39 S-8352x40 to 49 S-8352x50 to 59 S-8352x60 − 0.4 V S-8352x15 to 19 EXT S-8352x20 to 24 S-8352x25 to 29 S-8352x30 to 39 S-8352x40 to 49 S-8352x50 to 59 S-8352x60 × 0.4 to × 0.6 OUT1 ...
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... Judged oscillation stop EXT pin OFF = OFF − S-8352x30 S-8352x50 / 100 Ω OUT( OFF pin is connected to V OUT = 0.8 V. However, 1.8 V ≤ ≥ 1.8 V must be applied for products with a set value of less than DD Seiko Instruments Inc. S-8351/8352 Series ( ° ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER S-8351/8352 Series Measurement Circuits 1. + CONT − VSS 300 Ω 2. CONT * OFF VSS 3. + − VSS www.DataSheet4U.com OFF *1. For separate type DD OUT *2. With shutdown function 14 + VOUT V *1 − VDD *2 ON ...
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... In the A, B, and D types, the duty ratio is automatically switched 75% when the output load current is high to secure the load drive capability and 50% when the output load current is low to control the load drive capability to decrease pulse skipping ...
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... DO NOT use the ON / OFF up or pulled down internally. DO NOT apply a voltage of between 0.3 V and 0. the applying such a voltage increases the current consumption. If the shutdown pin is not used, connect it to the VOUT pin. The ON / OFF pin does not have hysteresis. ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER Rev.2.0 _00 3. Operation The following are the basic equations [(1) through (7)] of the step-up switching regulator. (Refer to Figure 18 .) Figure 18 Step-Up Switching Regulator Circuit for Basic Equation Voltage at CONT pin at the moment M1 is turned ...
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... OUT V = • P − Therefore to reduce the ripple voltage important that the capacitor connected to the output pin has a large capacity and a small R ESR 18 − • t consumed result, the pin voltage When M1 is turned OFF, the energy stored transmitted through the ON rises rapidly ...
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... Inductor To minimize the loss due to inductor direct current resistance, select an inductor with the smallest possible direct current resistance (less than 1 Ω). Set the inductance value (L value) to around 22 µ mH. To make the average value of the output voltage (V to the output current (I ...
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... MOS FET, and affect the output current as well as the efficiency, the threshold voltage should be low. When the output voltage is as low as 2.0 V, like in the S-8352A20, the circuit operates only when the MOS FET has a threshold voltage lower than the output voltage. ...
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... FE A small R value can increase the output current, but the efficiency decreases. Since a current may flow on the b pulse and the voltage may drop due to wiring resistance or other factors in the actual circuit, therefore the optimum R value should be determined by experiment. b Connecting the speed-up capacitor (C switching loss and improves the efficiency ...
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... V or more at the VDD pin for all products with a setting less than 1.9 V.) An input voltage of 1 more at the VDD pin allows connection of the VDD pin to either the input voltage VIN pin or output VOUT pin. ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER Rev.2.0 _00 Standard Circuits 1. S-8351 Series (1) A type − (2) B and C types − www.DataSheet4U.com SD CONT L Protection circuit PFM control IN circuit ON / OFF Figure CONT Protection circuit PFM control IN circuit Figure 22 Seiko Instruments Inc ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER S-8351/8352 Series (3) D type − Caution The above connection diagram will not guarantee successful operation. Perform through evaluation using the actual application to set the constant. www.DataSheet4U.com 24 SD CONT L IC internal Protection ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER Rev.2.0 _00 2. S-8352 Series (1) A type − (2) B and C types − www.DataSheet4U.com 2200 pF PFM control circuit EXT 1 kΩ OFF Figure 24 2200 pF PFM control circuit EXT 1 kΩ ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER S-8351/8352 Series (3) D type − Caution The above connection diagram and constants will not guarantee successful operation. Perform through evaluation using the actual application to set the constant. www.DataSheet4U.com 26 IC internal power supply 2200 pF PFM control circuit EXT 1 kΩ ...
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... Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection IC. • SII claims no responsibility for any and all disputes arising out connection with any infringement of the products including this IC upon patents owned by third party. www.DataSheet4U.com Seiko Instruments Inc ...
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... Temperature (Ta) vs. Current Consumption 2 (I SS2 ° [V] Seiko Instruments Inc S-8352A ° [V] OUT 50 S-8352A30MC 40 S-8352A50MC −50 − [°C] 5 S-8351A30MC 4 S-8351A50MC −50 − [°C] Rev.2.0 _00 7 100 ) ...
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... Seiko Instruments Inc. S-8351/8352 Series S-8351A30MC 47 S-8351A50MC 45 −50 − 100 Ta [°C] 400 350 300 250 200 150 100 S-8351A30MC S-8351A50MC 50 0 −50 − 100 Ta [°C] EXTH S-8352A30MC S-8352A50MC 0 −50 − 100 Ta [° ...
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... Temperature (Ta) vs. EXT Pin Output Current “L” (I EXTL ° [V] OUT ) 16. Temperature (Ta) vs. Retention Voltage (V ST1 S-8351A30MC S-8351A50MC 100 Seiko Instruments Inc. Rev.2 S-8352A30MC S-8352A50MC 0 −50 − 100 Ta [°C] HLD 0.8 S-8351A30MC 0.7 S-8351A50MC 0.6 0.5 0.4 0.3 0.2 −50 − 100 Ta [°C] ...
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... Output voltage [0 div] Seiko Instruments Inc. S-8351/8352 Series S-8351A50MC V Input voltage [ div div [0 div] S-8352A50MC div div [0 div] S-8351A30MC V = 1.8 → 1 1 div] [0 div div] ...
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... OUT Output current OUT Output voltage [0 div] Seiko Instruments Inc. S-8352A30MC = 1.8 → 1 1 div] [0 div div] S-8352A50MC [0 div] [0 div div] S-8351A30MC → 10 µA IN OUT µA OUT [0 div div] S-8351A50MC = 20 mA → ...
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... Output voltage t [0 div] Seiko Instruments Inc. S-8351/8352 Series S-8352A30MC = 12 mA → 10 µ 1 OUT = 10 µA I OUT [0 div div] S-8352A50MC = 20 mA → 10 µ OUT = 10 µ OUT t [0 div] S-8351A50MC ON / OFF voltage OFF [0 div div] ...
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... S-8351A30MC 3 S-8351A30MC 4 S-8351A50MC 5 S-8351A50MC 6 S-8351A50MC 7 S-8352A30MC 8 S-8352A30MC 9 S-8352A30MC 10 S-8352A50MC 11 S-8352A50MC 12 S-8352A50MC The properties of the external parts are shown below. Part Product Name Coil CDRH6D28-220 CDRH6D28-470 CDRH6D28-101 CDRH125-221 www.DataSheet4U.com CXLP120-470 CXLP120-101 *1. Direct current resistance *2. Maximum allowable current Part Product Name Diode MA2Z748 ...
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... Rev.2.0 _00 2. Step-up Characteristics ( ° C) The data of the step-up characteristics ((a) Input voltage (V stepped up), (b) Input voltage (V current (I ) vs. Output voltage (V OUT under conditions Table 18 is shown below. Condition 1 S-8351A30MC (a) Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 3.2 3.1 3 ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER S-8351/8352 Series Condition 3 S-8351A30MC (a) Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 3.2 3.1 3.0 2.9 2.8 2.7 2 (c) Output current (I ) vs.Output voltage (V OUT 3.2 3.1 3.0 2.9 2.8 2.7 2 100 I OUT Condition 4 S-8351A50MC (a) Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 5 ...
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... STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER Rev.2.0 _00 Condition 5 S-8351A50MC (a) Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 5.2 5.1 5.0 4.9 4.8 4.7 4 (c) Output current (I ) vs.Output voltage (V OUT 5.2 5.1 5.0 4.9 4.8 4.7 4 100 I OUT Condition 6 S-8351A50MC (a) Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 5 ...
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... Output current (I ) vs.Output voltage (V OUT 3.2 3.1 3.0 2 2 100 150 200 I OUT Condition 8 S-8352A30MC (a) Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 3.2 3.1 3.0 2.9 www.DataSheet4U.com 2.8 2.7 2 (c) Output current (I ) vs.Output voltage (V OUT 3.2 3.1 3.0 2.9 = 1 ...
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... Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 3.2 3.1 3.0 2.9 2.8 2.7 2 (c) Output current (I ) vs.Output voltage (V OUT 3.2 3.1 3.0 2.9 2.8 2.7 2 100 150 200 I OUT Condition 10 S-8352A50MC (a) Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 5.2 5.1 5.0 www.DataSheet4U.com 4.9 4.8 4.7 4 (c) Output current (I ) vs.Output voltage (V OUT 5.2 5.1 5.0 4.9 4.8 4.7 4 ...
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... Output voltage (V IN (Input voltage raising) 5.2 5.1 5.0 4.9 4.8 4.7 4 (c) Output current (I ) vs.Output voltage (V OUT 5.2 5.1 5.0 4.9 4.8 4.7 4 100 150 200 I OUT Condition 12 S-8352A50MC (a) Input voltage (V ) vs. Output voltage (V IN (Input voltage raising) 5.2 5.1 5.0 www.DataSheet4U.com 4.9 4.8 4.7 4 (c) Output current (I ) vs.Output voltage (V OUT 5.2 5.1 5.0 4.9 4.8 4.7 4 100 150 ...
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... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc ...