MIC37139 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – 1.5A, LOW VOLTAGE UCAP LDO REGULATOR

MIC37139
Micrel
MIC37139
1.5A, Low-Voltage µCap 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 –40°C
to +125°C.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Features
• 1.5A minimum guaranteed output current
• 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
• Stable with ceramic or tantalum capacitor
• Wide input voltage range:
V_IN: 2.25V to 6.0V
• +1.0% initial output tolerance
• Fixed 1.8V output voltage
• Excellent line and load regulation specifications
• Thermal shutdown and current-limit protection
• Reverse-leakage protection
• Low profile SOT-223 package
Applications
• 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^® power supplies
• Multimedia and PC processor supplies
Typical Application
V_IN
3.3V
MIC37139
IN OUT
GND
1.8V
10µF
ceramic
1.8V/1.5A Regulator
Super ßeta PNP is a registered trademark of Micrel, Inc.
PowerPC is a registered trademark of IBM Corporation.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
November 2003
1
M9999-112003