S-1131 Series HIGH RIPPLE-REJECTION AND LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR www.sii-ic.com SII Semiconductor Corporation, 2002-2014 Rev.4.1 01 The S-1131 Series is a positive voltage regulator with a low dropout voltage, high-accuracy output voltage, and low current consumption developed based on CMOS technology. A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a built-in overcurrent protection circuit prevents the load current from exceeding the current capacitance of the output transistor. An ON/OFF circuit ensures a long battery life, and small SOT-89-3, SOT-89-5 and 6-Pin HSON(A) packages realize high-density mounting. Features Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V step Output voltage accuracy: 1.0% Dropout voltage: 250 mV typ. (3.0 V output product, IOUT = 100 mA) Current consumption: During operation: 35 A typ., 65 A max. During power-off: 0.1 A typ., 1.0 A max. *1 Output current: Possible to output 300 mA (VIN VOUT(S) + 1.0 V) Ripple rejection: 70 dB typ. (f = 1.0 kHz) Limits overcurrent of output transistor. Built-in overcurrent protection circuit: Built-in ON/OFF circuit: Ensures long battery life. Operation temperature range: Ta = 40C to +85C *2 Lead-free, Sn 100%, halogen-free *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 DVD and CD-ROM drive Constant-voltage power supply for battery-powered device Constant-voltage power supply for personal communication device Constant-voltage power supply for note book PC Packages SOT-89-3 SOT-89-5 6-Pin HSON(A) 1 HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1 01 Block Diagrams (1) Without ON/OFF circuit (Package: SOT-89-3) *1 VIN VOUT Overcurrent protection circuit + Reference voltage circuit VSS *1. Parasitic diode Figure 1 (2) With ON/OFF circuit (Package: SOT-89-5, 6-Pin HSON(A)) *1 VIN VOUT Overcurrent protection circuit + ON/OFF ON/OFF circuit Reference voltage circuit VSS *1. Parasitic diode Figure 2 2