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S-1137 Datasheet(PDF) 1 Page - Seiko Instruments Inc |
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S-1137 Datasheet(HTML) 1 Page - Seiko Instruments Inc |
1 / 47 page S-1137 Series www.sii-ic.com HIGH RIPPLE-REJECTION LOW DROPOUT SOFT-START FUNCTION CMOS VOLTAGE REGULATOR © SII Semiconductor Corporation, 2009-2015 Rev.2.1_01 1 The S-1137 Series, developed using the CMOS technology, is a positive voltage regulator IC which has the low dropout voltage, the high-accuracy output voltage and the soft-start function (300 mA output current). A 1.0 μF small ceramic capacitor can be used. It operates with low current consumption of 45 μA typ. The overcurrent protection circuit prevents the load current from exceeding the current capacity of the output transistor. The ON / OFF circuit ensures longer battery life. Compared to the conventional CMOS technology regulator ICs, various capacitors including small ceramic capacitors can be used for this IC. Furthermore, small SOT-89-5, SOT-23-5, and SNT-6A(H) packages realize high-density mounting. Features • Output voltage: 1.2 V to 3.5 V, selectable in 0.05 V step • Input voltage: 1.7 V to 5.5 V • Output voltage accuracy: ±1.0% (1.2 V to 1.45 V output product : ±15 mV) • Dropout voltage: 210 mV typ. (2.8 V output product, IOUT = 300 mA) • Current consumption: During operation: 45 μA typ., 65 μA max. During power-off: 0.1 μA typ., 1.0 μA max. • Output current: Possible to output 300 mA (VIN ≥ VOUT(S) + 1.0 V)*1 • Input and output capacitors: A ceramic capacitor of 1.0 μF or more can be used. • Ripple rejection: 70 dB typ. (f = 1.0 kHz) • Built-in soft-start circuit: Soft-start time : 0.7 ms typ. (CSS = 1.0 nF) • Built-in overcurrent protection circuit: Limits overcurrent of output transistor. • Built-in ON / OFF circuit: Ensures long battery life. • Pull-down resistor is selectable. • Discharge shunt function is selectable. • Operation temperature range: Ta = −40°C to +85°C • Lead-free, Sn 100%, halogen-free*2 *1. Attention should be paid to the power dissipation of the package when the output current is large. *2. Refer to “ Product Name Structure” for details. Applications • Constant-voltage power supply for battery-powered device • Constant-voltage power supply for cellular phone, portable device • Constant-voltage power supply for digital still camera, TV, DVD recorder Packages • SOT-89-5 • SOT-23-5 • SNT-6A(H) |
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