MIC37300_09 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 3.0A, Low-Voltage μCap LDO Regulator

MIC37300/01/02/03
3.0A, Low-Voltage µCap LDO Regulator
General Description
The Micrel MIC37300/01/02/03 is a 3.0A low-dropout
linear voltage regulator that provides a low-voltage,
high-current output with a minimum number of external
components. It offers high precision, ultra-low-dropout
(500mV overtemperature), and low-ground current.
The MIC37300/01/02/03 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, DSP,
microcontroller, etc.). It is available in fixed and
adjustable output voltages. Fixed voltages include 1.5V,
1.8V, 2.5V and 3.3V. The adjustable version is capable
of 1.24V to 5.5V.
Features of the MIC37300/01/02/03 LDO include
thermal and current-limit protection, and reverse-current
protection. Logic enable and error flag pins are available
on the 5-pin version.
Junction temperature range of the MIC37300/01/02/03
is from–40°C to +125°C.
For applications requiring input voltage greater than
6.0V, see the MIC3910x, MIC3915x, MIC3930x, and
MIC3950x LDOs.
Data sheets and support documentation can be found
on Micrel’s web site at www.micrel.com.
Features
• 3.0A 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
– VIN: 2.25V to 6.0V
• +1.0% initial output tolerance
• Fixed and adjustable output voltages:
– MIC37300—3-pin fixed voltages
– MIC37301—5-pin S-Pak or 8-pin e-Pad SOIC
fixed voltages with flag
– MIC37302—5-pin adjustable voltage
– MIC37303—8-pin e-Pad SOIC adjustable
voltage with flag
• Excellent line and load regulation specifications
• Thermal shutdown and current-limit protection
• Reverse-leakage protection
• Low profile S-Pak package
Applications
• LDO linear regulator for low-voltage digital IC
• PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Battery charger
Typical Application
V_IN = 3.0V
MIC37300
VIN
VOUT
GND
V_OUT = 2.5V
C_OUT
47µF, Ceramic
V_IN
C_IN
MIC37302
VIN
VOUT
R1
VEN
ADJ
GND
R2
1.3V
C_OUT
47µF, Ceramic
Fixed 2.5V Regulator
Adjustable Regulator
Super ßeta PNP is a registered trademarks of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
October 2009
1
M9999-102909