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
1.5 V to 5.5 V, selectable in 0.1 V steps.
±1.0%
190 mV typ. (3.0 V output product, I
OUT
=
100 mA)
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
Ensures long battery life.
•
Built-in ON/OFF circuit:
•
Low ESR capacitor can be used: A ceramic capacitor of 0.47
µF
or more can be used for the output
capacitor.
80 dB typ. (at 1.0 kHz)
•
High ripple rejection:
Overcurrent of output transistor can be restricted.
•
Built-in overcurrent protector:
SNT-6A(H)(S-1112 series only), SOT-23-5
•
Small package:
•
Lead-free products
*1.
Attention should be paid to the power dissipation of the package when the output current is large.
•
Output voltage:
•
High-accuracy output voltage:
•
Low dropout voltage:
•
Low current consumption:
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
PI006-A
MP005-A
Reel
PI006-A
MP005-A
Land
PI006-A
Seiko Instruments Inc.
1
SII [ SEIKO INSTRUMENTS INC ]
