S-1112_1 Datasheet, PDF (1/30 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR

Rev.5.1_00
HIGH RIPPLE-REJECTION AND 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)
and SOT-23-5 packages realize high-density
mounting. In SOT-23-5, the lineup includes the S-
1112 and S-1122 Series, which differ in pin
configuration.
„ 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, I_OUT = 100 mA)
• Low current consumption:
During operation: 50 µA typ., 90 µA max.
• High peak current capability:
During shutdown: 0.1 µA typ., 1.0 µA max.
150 mA output is possible (at V_IN ≥ V_OUT(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. (at 1.0 kHz)
• Built-in overcurrent protector: Overcurrent of output transistor can be restricted.
• Small package:
SNT-6A(H)(S-1112 series only), SOT-23-5
• 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
„ Packages
Package name
SNT-6A(H)
SOT-23-5
Package
PI006-A
MP005-A
Drawing code
Tape
Reel
PI006-A
PI006-A
MP005-A
MP005-A
Land
PI006-A

Seiko Instruments Inc.
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