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Overview - S-1731 series

Super-Small package 2-Circuit High Ripple-Rejection Low Current Consumption Low Dropout Middle Output Current CMOS Voltage Regulator S-1731 Series

S-1731 Series, developed using the CMOS technology, is a 2-channel positive voltage regulator IC which has the low dropout voltage, the high-accuracy output voltage and the low output current consumption of 300 mA.
Users are able to use a small ceramic capacitor of 1.0 µF for this IC. This IC includes two regulator circuits with ±1.0% high-accuracy output voltage in the super-small HSNT-6A package.
Compared with the conventional 300 mA output current 2-channel CMOS voltage regulators, high-density mounting is realized by using the super-small package and a small ceramic capacitor. Also, the low current consumption makes the S-1731 Series ideal for mobile devices.

DATA SHEET
2008.12.17

Features


    • Output voltage: 1.2 V to 3.3 V, selectable in 0.05 V step.
    • A ceramic capacitor of 1.0 µF or more can be used as the I/O capacitor.
    • Wide input voltage range: 1.7 V to 5.5 V
    • High-accuracy output voltage: ±1.0%
    • Low dropout voltage: 200 mV typ. (products having the output of 3.0 V, IOUT = 300 mA)
    • Low current consumption: During operation: 24 µA typ., 45 µA max. (per circuit)
      During shutdown: 0.1 µA typ., 1.0 µA max.
    • Output current: Possible to output 300 mA (at VIN ≥ VOUT(S) + 1.0 V)*1 (per circuit)
    • High ripple rejection: 70 dB typ. (at 1.0 kHz, VOUT = 1.2 V)
    • Built-in overcurrent protector: limits overcurrent of output transistor
    • Built-in power-off circuit: Ensures long battery life.
    • Resistor is selectable in pull-up or pull-down
    • Small package: HSNT-6A
    • Lead-free product

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

Applications


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

Standard Circuit