MIC5396/7/8/9

Low-Power Dual 300mA LDO

Revision 1.1

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

January 14, 2013

Revision 1.1

General Description

The MIC5396/7/8/9 is an advanced dual LDO ideal for

powering

general

purpose

portable

devices.

The

MIC5396/7/8/9

provides

two

high-performance,

independent 300mA LDOs in a single package. This

makes it possible to improve system efficiency by

providing two independent supply inputs that can be

optimized for each individual LDO. The MIC5396/7/8/9

also features a wide output voltage range down to 1.0V.

Its full feature set and low dropout voltage make it ideal for

battery-powered applications. The MIC5396/7/8/9 offers

2% accuracy, low dropout voltage (160mV at 300mA), and

low ground current (typically 42

μA per LDO at full load).

The MIC5396/7/8/9 can also be put into a zero off mode

current state, drawing virtually no current when disabled.

When the MIC5397/9 is disabled an internal resistive load

is automatically applied to the output to discharge the

output capacitor. In addition, the MIC5398/9 offers an

internal enable pull-down resistor to ensure that the output

is disabled when the enable is in tri-state mode. These

LDO’s also offer fast transient response and high PSRR

while consuming a minimum operating current. The family

is available in a tiny 8-pin, 1.2mm x 1.6mm leadless Extra

Thin DFN package.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• 2.5V to 5.5V input voltage range

• Independent power inputs

• Output voltage range from 1V to 3.3V

• Two 300mA outputs

• High output accuracy (±2%)

• Low quiescent current – 37µA typical/LDO

• Stable with 1µF ceramic output capacitors

• Low dropout voltage (160mV at 300mA)

• Independent enable pins

• Internal enable pull-down (MIC5398, MIC5399)

• Output discharge circuit (MIC5397, MIC5399)

• Thermal-shutdown protection

• Current-limit protection

• 8-pin 1.2mm x 1.6mm Extra Thin DFN package

Applications

• Smart phones

• DSC, GPS, PMP and PDAs

• Medical devices

• Portable electronics

• 5V systems

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Typical Application