Rev.2.1_00
HIGH RIPPLE-REJECTION WLP PACKAGE
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2985 Series
The S-L2985 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 super-small
WLP-4B package realizes 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:
• Low current consumption:
±1.0%
190 mV typ. (3.0 V output product, IOUT = 100 mA)
During operation: 50 μA typ., 90 μA max.
During shutdown: 0.1 μA typ., 1.0 μA max.
150 mA output is possible (@ VIN ≥ VOUT(S) + 1.0 V)*1
Ensures long battery life.
• High peak current capability:
• 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. (@ 1.0 kHz)
Overcurrent of output transistor can be restricted.
WLP-4B
• High ripple rejection:
• Built-in overcurrent protector:
• Super-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 battery-powered devices
• Power supply for personal communication devices
• Power supply for home electric/electronic appliances
• Power supply for cellular phones
Package
Package name
Drawing code
Tape
Package
HB004-A
Reel
HB004-A
WLP-4B
HB004-A
Seiko Instruments Inc.
1
SII [ SEIKO INSTRUMENTS INC ]
