Rev.1.2
_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
1.5 V to 5.5 V, selectable in 0.1 V steps.
鹵1.0%
190 mV typ. (3.0 V output product, I
OUT
=
100 mA)
During operation: 50
碌A(chǔ)
typ., 90
碌A(chǔ)
max.
During shutdown: 0.1
碌A(chǔ)
typ., 1.0
碌A(chǔ)
max.
*1
鈥?/div>
High peak current capability:
150 mA output is possible (@ V
IN
鈮?/div>
V
OUT(S)
+
1.0 V)
Ensures long battery life.
鈥?/div>
Built-in ON/OFF circuit:
鈥?/div>
Low ESR capacitor can be used: A ceramic capacitor of 0.1
碌F
or more can be used for the output
capacitor.
80 dB typ. (@ 1.0 kHz)
鈥?/div>
High ripple rejection:
Overcurrent of output transistor can be restricted.
鈥?/div>
Built-in overcurrent protector:
SOT-23-5
鈥?/div>
Small package:
*1.
Attention should be paid to the power dissipation of the package when the output current is large.
鈥?/div>
Output voltage:
鈥?/div>
High-accuracy output voltage:
鈥?/div>
Low dropout voltage:
鈥?/div>
Low current consumption:
Applications
鈥?/div>
Power supply for battery-powered devices
鈥?/div>
Power supply for personal communication devices
鈥?/div>
Power supply for home electric/electronic appliances
鈥?/div>
Power supply for cellular phones
Package
鈥?/div>
SOT-23-5
(Package drawing code: MP005-A)
Seiko Instruments Inc.
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