MIC5373/83

Triple 200mA µCap

LDO in 2.5 x 2.5 Thin MLF

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

July 2010

M9999-070110

General Description

The MIC5373/83 is a triple output device with three 200mA

LDOs which is ideal for application processor support in

mobile platforms. The MIC5373 provides independent

control active high enables for each of the 200mA LDOs.

The MIC5383 provides active low enables. Both the

MIC5373 and MIC5383 are available in the tiny 2.5mm x

2.5mm Thin MLF

The MIC5373/83 is designed for high input ripple rejection

(high PSRR) and provides low output noise making it ideal

for powering sensitive RF circuitry such as GPS, WiFi and

Bluetooth applications. The MIC5373/83 also incorporates

a power-on-reset (POR) supervisor with adjustable delay

time set by an external capacitor, and an independent

input pin to monitor any voltage level. Once high the POR

output can be asserted low again by enabling the manual

reset (MR) pin. When the MR pin is restored low the POR

output will re-time the delay set by the external delay

capacitor.

The MIC5373/83 operates with very small ceramic output

capacitors to reduce board space and component cost. It

is available in various fixed output voltages. The

MIC5373/83 has a junction temperature range from -40°C

to 125°C.

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• 1.7V to 5.5V input supply voltage range

• Output current - 200mA LDO1/2/3

• High output accuracy (±2%)

• Independent enable pins

• POR with user-defined voltage monitoring

- POR voltage input

- Adjustable delay time

- Manual reset pin

• Low dropout voltage – 170mV at 150mA

• High PSRR - 55dB at 1kHz on each LDO

• Stable with tiny ceramic output capacitors

• Thermal shutdown and current limit protection

Applications

• Mobile phones

• GPS receivers

• Application co-processors

• PDAs and handheld devices

Typical Application

BIAS

INLDO1/ 2

INLDO3

EN1

EN2

EN3

MR

OUT1

OUT2

OUT3

POR

POR_IN

DLY

MIC5373

GND

100k

1µF

1µF

0.1µF

1µF

1µF

1µF

150pF

10k

10k

Typical MIC5373-xxxYMT Circuit

(Active High Enable)

EN1

EN2

EN3

BIAS

INLDO1/ 2

INLDO3

MR

OUT1

OUT2

OUT3

POR

POR_IN

DLY

MIC5383

GND

100k

1µF

1µF

0.1µF

1µF

1µF

1µF

150pF

10k

10k

Typical MIC5383-xxxYMT Circuit

(Active Low Enable)