MIC37150/37151/37152
Micrel
MIC37150/37151/37152
1.5A, Low Voltage
µ
Cap LDO Regulator
General Description
The Micrel MIC37150/51/52 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 over temperature), and
low ground current.
The MIC37150/51/52 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 available in fixed and adjustable output voltages.
Fixed voltages include 1.5V, 1.65V, 1.8V, 2.5V and 3.3V. The
adjustable version is capable of supplying output voltages
from 1.24V to 5.5V.
Features of the MIC37150/51/52 LDO include thermal and
current limit protection, and reverse current and reverse
battery protection. Logic enable and error flag pins are
available.
Junction temperature range of the MIC37150/51/52 is from
–40°C to 125°C.
For applications requiring input voltage greater than 6.0V,
see MIC3910x, MIC3915x, MIC3930x, and MIC3950x LDOs.
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
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 and adjustable output voltages
MIC37150—3-pin fixed voltages
MIC37151—5-pin fixed voltages
MIC37152—5-pin adjustable voltage
• Excellent line and load regulation specifications
• Logic controlled shutdown
• Thermal shutdown and current limit protection
• Reverse-leakage protection
• Low profile S-Pak 3 or 5 pin packages
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
C
IN
VEN
GND
FLG
MIC37151
VIN
VOUT
100k
V
OUT
= 2.5V
C
OUT
47µF, Ceramic
Fixed 2.5V Regulator with Error Flag
V
IN
C
IN
VEN
GND
ADJ
R2
MIC37152
VIN
VOUT
R1
C
OUT
47µF, Ceramic
1.3V
Adjustable Regulator
Super ßeta PNP is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
August 2003
1
MIC37150/37151/37152
MICREL [ MICREL SEMICONDUCTOR ]
