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Overview - S-1112/1122 series

High Ripple-Rejection Low Dropout CMOS Voltage Regulator S-1112/1122 series

The S-1112/1122 series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, 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 protector prevents the load current from exceeding the current capacitance of the output transistor. An ON/OFF circuit ensures a long battery life. Compared with the voltage regulators using the conventional CMOS process,
a larger variety of capacitors are available, including small ceramic capacitors. Small SNT-6A(H) (S-1112 Series only), SOT-23-5 and 5-Pin SON(A) packages realize high-density mounting. In SOT-23-5 and 5-Pin SON(A), the lineup includes the S-1112 and S-1122 series, which differ in pin configuration.

DATA SHEET
2007.10.29

Features


    • Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V steps
    • High-accuracy output voltage: ±1.0%
    • Low dropout voltage: 190 mV typ. (3.0 V output product, Iout =100 mA)
    • Low current consumption: During operation 50 µA typ. 90 µA max., During shutdown 0.1 µA typ. 1.0 µA max.
    • High peak current capability: 150 mA output is possible (@ Vin >Vout(s) +1.0 V) *1
    • Built-in ON/OFF circuit: Ensures long battery life.
    • Low ESR capacitor can be used: A ceramic capacitor of 0.47 µF or more can be used for the output capacitor.
    • High ripple rejection: 80 dB typ. (@ 1.0 kHz)
    • Built-in overcurrent protector: Overcurrent of output transistor can be restricted.
    • Small package: SOT-23-5, SNT-6A(H) (S-1112 series only)
    • Lead-free products

      *1 Attention should be paid to the power dissipation of the package when the output current is large.

Applications


    • Power supply for battery-powered devices
    • Power supply for personal communication devices
    • Power supply for home electric/electronic appliances
    • Power supply for cellular phones

Standard Circuit