Rev.3.0_02
HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT
CMOS VOLTAGE REGULATOR
S-1170 Series
The S-1170 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, a built-in
overcurrent protector prevents the load current from
exceeding the current capacitance of the output
transistor, and a built-in thermal shutdown circuit
prevents damage caused by the heat. 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 SOT-89-5
and 6-Pin HSON(A) packages realize high-density
mounting.
Features
1.5 V to 5.5 V, selectable in 0.1 V steps.
• Output voltage:
• High-accuracy output voltage:
• Low dropout voltage:
1.0%
120 mV typ. (3.0 V output product, IOUT = 300 mA)
During operation: 80 µA typ., 160 µA max.
During shutdown: 0.1 µA typ., 1.0 µA max.
800 mA output is possible (at VIN ≥ VOUT(S) + 1.0 V)*1
Ensures long battery life.
• Low current consumption:
• High current capability:
• Built-in ON/OFF circuit:
• Low ESR capacitor can be used: A ceramic capacitor of 4.7 µF or more can be used for the output
capacitor.
70 dB typ. (at 1.0 kHz)
• High ripple rejection:
Overcurrent of output transistor can be restricted.
Damage caused by heat can be prevented.
SOT-89-5, 6-Pin HSON(A)
• Built-in overcurrent protector:
• Built-in thermal shutdown circuit:
• Small package:
• 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 DVD and CD-ROM drives
• Power supply for battery-powered devices
• Power supply for personal communication device
• Power supply for note PCs
Packages
Package Name
Drawing Code
Tape
Package
UP005-A
PD006-A
Reel
UP005-A
PD006-A
SOT-89-5
6-Pin HSON(A)
UP005-A
PD006-A
1
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
