MIC37300/01/02/03
3.0A, Low-Voltage µCap LDO Regulator
General Description
Features
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.
• 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
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.
–
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
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.
–
–
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
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.
• Low profile S-Pak package
Data sheets and support documentation can be found
on Micrel’s web site at www.micrel.com.
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
MIC37300
MIC37302
VIN = 3.0V
VOUT = 2.5V
VIN
1.3V
VIN
VOUT
VIN
VOUT
COUT
47µF, Ceramic
R1
R2
CIN
COUT
47µF, Ceramic
VEN
ADJ
GND
GND
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 +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
1
M9999-102909
October 2009