MIC37501_11 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – 5A, Low Voltage μCap LDO Regulator

MIC37501/37502
5A, Low Voltage μCap LDO Regulator
General Description
The MIC37501 and MIC37502 are 5A, low dropout
linear voltage regulator that provide low voltage, high
current outputs with a minimum of external components.
They offer high precision, ultra-low dropout (500mV),
and low ground current.
The MIC37501and MIC37502 operate from an input of
2.3V to 6.0V. They are designed to drive digital circuits
requiring low voltage at high currents (i.e., PLDs, DSPs,
microcontrollers, etc.). They are 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 1.24V to 5.5V.
MIC37501 and MIC37502 LDOs feature thermal and
currentlimit protection and reverse current protection.
Logic enable and error flag pins are available.
Junction temperature range of the MIC37501/02 is from
–40°C to 125°C.
For applications requiring input voltage greater than
6.0V, see MIC3910x, MIC3915x, MIC3930x, and
MIC3950x LDOs.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Features
• 5A minimum guaranteed output current
• 500mV maximum dropout voltage
– 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: 2.3V to 6.0V
• ±1.0% initial output tolerance
• Fixed and adjustable output voltages:
– MIC37501—7 terminal fixed voltage
– MIC37502—5 (TO-263) and 7 (SPAK) terminal
adjustable voltage
• Excellent line and load regulation specifications
• Logic controlled shutdown
• Thermal shutdown and current-limit protection
• Reverse-leakage protection
• Low profile S-Pak and TO-263 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 Applications
V_IN = 3.0V
C_IN
MIC37501
VIN
VOUT
VIN
VOUT
VEN
FLG
GND
100k
V_OUT = 2.5V
C_OUT
100F, Ceramic
Fixed 2.5V Regulator with Error Flag
V_IN
C_IN
MIC37502
VIN
VOUT
VIN
VOUT
VEN
ADJ
GND
1.3V
R1
C_OUT
100F, Ceramic
R2
Adjustable Regulator
Dropout
vs. Output Current
450
400
350
300
250
2.5V_OUT
200
150
100
50
0
012345
OUTPUT CURRENT (A)
Super βeta is a registered trademark of Micrel Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
May 2011
1
M9999-050511-B