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| SC1453_08 Datasheet, PDF (1/15 Pages) Semtech Corporation – 150mA Ultra Low Dropout Regulator with Low Noise Bypass | |||
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SC1453
150mA Ultra Low Dropout
Regulator with Low Noise Bypass
POWER MANAGEMENT
Description
The SC1453 is a low dropout linear regulator that
operates from a +2.25V to +6.5V input range and
delivers up to 150mA. A PMOS pass transistor allows
the low 75µA supply current to remain independent of
load, making these devices ideal for battery operated
portable equipment such as cellular phones, cordless
phones and personal digital assistants.
The SC1453 has a bandgap reference bypass pin for
very low noise operation - a 10nF (typ.) capacitor may be
connected between this pin and ground. Other features
include low powered shutdown, short circuit protection,
thermal shutdown protection and reverse battery
protection. The SC1453 comes in the tiny 5 lead SOT-23
package and the ultra-low profile 5 lead TSOT-23.
Features
 â2982/5205â compatible pinout
 Guaranteed 150 mA output current
 2% output accuracy guaranteed over line, load and
temperature
 Very small external components - designed to work
with ceramic capacitors
 Low 26µVRMS output noise
(1.5V option, C = C = 1µF, C = 10nF)
Â
IN
OUT
Very low supply current
BYP
 Thermal overload protection
 Reverse battery protection
 Low power shutdown
 Full industrial temperature range
 Very low profile packaging available (1mm max. height)
 Surface mount packaging (5 pin SOT-23 and
TSOT-23)
 Available in Lead-free packages, fully WEEE and RoHS
compliant
Applications
 Battery Powered Systems
 Cellular Telephones
 Cordless Telephones
 Personal Digital Assistants
 Portable Instrumentation
 Modems
 PCMCIA cards
Typical Application Circuit
VIN
C1
1uF
U1
1 IN
SC1453
OUT 5
3 EN GND BYP 4
2
C2
10nF
VOUT
C3
1uF
Revision: April 21, 2008
1
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