S-T111 Datasheet, PDF (1/23 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

Rev.2.1_00
HIGH RIPPLE-REJECTION
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
The S-T111 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. A small SOT-23-5 package realizes high-
density mounting.
„ 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.
During shutdown: 0.1 μA typ., 1.0 μA max.
• High peak current capability:
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 0.1 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:
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
„ Package
Package Name
SOT-23-5
Package
MP005-A
Drawing Code
Tape
MP005-A
Reel
MP005-A
Seiko Instruments Inc.
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