MIC37501-2.5WR View Datasheet(PDF) - Micrel

Part Name

Description

Manufacturer

MIC37501-2.5WR

5A, Low Voltage μCap LDO Regulator

Micrel 

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:

- VIN: 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

VIN = 3.0V

CIN

MIC37501

VIN

VOUT

VIN

VOUT

VEN

FLG

GND

100k

VOUT = 2.5V

COUT

100F, Ceramic

Fixed 2.5V Regulator with Error Flag

VIN

CIN

MIC37502

VIN

VOUT

VIN

VOUT

VEN

ADJ

GND

1.3V

R1

COUT

100F, Ceramic

R2

Adjustable Regulator

Dropout

vs. Output Current

450

400

350

300

250

2.5VOUT

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 +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

May 2011

1

M9999-050511-B

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