MIC37139
Micrel
MIC37139
1.5A, Low-Voltage
碌
Cap LDO Regulator
General Description
The Micrel MIC37139 is a 1.5A low-dropout linear voltage
regulator that provides a low-voltage, high-current output
with a minimum of external components. It offers high preci-
sion, ultra-low dropout (500mV overtemperature), and low
ground current.
The MIC37139 operates from an input of 2.25V to 6.0V. It is
designed to drive digital circuits requiring low-voltage at high
currents (i.e., PLDs, DSPs, microcontrollers, etc.). It is avail-
able in fixed output voltages, including 1.5V, 1.65V, 1.8V,
2.5V and 3.3V.
Features of the MIC37139 LDO include thermal and current-
limit protection, and reverse-current and reverse-battery
protection.
Junction temperature range of the MIC37139 is from 鈥?0擄C
to +125擄C.
All support documentation can be found on Micrel鈥檚 web
site at www.micrel.com.
Features
鈥?1.5A minimum guaranteed output current
鈥?500mV maximum dropout voltage overtemperature
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion
鈥?Stable with ceramic or tantalum capacitor
鈥?Wide input voltage range:
V
IN
: 2.25V to 6.0V
鈥?+1.0% initial output tolerance
鈥?Fixed 1.8V output voltage
鈥?Excellent line and load regulation specifications
鈥?Thermal shutdown and current-limit protection
鈥?Reverse-leakage protection
鈥?Low profile SOT-223 package
Applications
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LDO linear regulator for low-voltage digital IC
PC add-in cards
High-efficiency linear power supplies
SMPS post regulator
Battery charger
Set-top boxes
Digital video recorders
PowerPC
廬
power supplies
Multimedia and PC processor supplies
Typical Application
V
IN
3.3V
MIC37139
IN
OUT
GND
1.8V
10碌F
ceramic
1.8V/1.5A Regulator
Super 脽eta PNP is a registered trademark of Micrel, Inc.
PowerPC is a registered trademark of IBM Corporation.
Micrel, Inc. 鈥?1849 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel + 1 (408) 944-0800 鈥?fax + 1 (408) 944-0970 鈥?http://www.micrel.com
November 2003
1
M9999-112003
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