MIC37139_09 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – 1.5A, Low-Voltage μCap LDO Regulator

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
precision, ultra-low dropout (500mV overtemperature), and
low ground current.
The MIC37139 operates from an input of 2.25V to 6.0V. It
is designed for a wide variety of applications including
digital circuits requiring low-voltage at high currents (i.e.,
PLDs, DSPs, microcontrollers, etc.). It is available in a
fixed output voltage of 1.8V, and as low as 1.5V.
Features of the MIC37139 LDO include thermal and
current-limit protection, and reverse-current and reverse-
battery protection. It’s junction temperature range of the is
from –40°C to +125°C.
Data sheets and 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 over temperature
• 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
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Typical Application
1.8V/1.5A Regulator
Super βeta is a registered trademark of Micrel, Inc
PowerPC is a registered trademark of IBM Corporation.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
November 2009
M9999-110209