MIC5528

High-Performance 500mA LDO

in Thin and Extra Thin DFN Packages

General Description

The MIC5528 is a low-power, µCap, low dropout regulator

designed for optimal performance in a very-small footprint.

It is capable of sourcing up to 500mA of output current

while only drawing 38µA of operating current. This high-

performance LDO is a µCap design in a thermally

enhanced 1.2mm × 1.2mm extra thin (0.4mm ht.) DFN

package. It operates with small ceramic output capacitor

for stability, thereby reducing required board space.

Ideal for battery-operated applications, the MIC5528 offers

±2% accuracy, extremely low dropout voltage (260mV @

500mA), and can regulate output voltages down to 1.0V.

Equipped with a TTL logic-compatible enable pin, the

MIC5528 can be put into a zero-off-mode current state,

drawing no current when disabled.

The MIC5528 is a µCap design, operating with very small

ceramic output capacitors for stability, reducing required

board space and component cost for space-critical

applications. The MIC5528 has an operating junction

temperature range of –40°C to 125°C.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

Features

• Input voltage range: 2.5V to 5.5V

• Fixed output voltages down to 1.0V

• ±2% Room temperature accuracy

• Low quiescent current 38µA

• Stable with 2.2µF ceramic output capacitors

• Low dropout voltage 260mV @ 500mA

• Auto discharge and internal enable pulldown

• Thermal-shutdown and current-limit protection

• 6-pin 1.2mm × 1.2mm extra thin DFN package

• 6-pin 1.2mm × 1.2mm thin DFN package

Applications

• Portable communication equipment

• DSC, GPS, PMP, and PDAs

• Portable medical devices

• 5V POL applications

Typical Application

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 5, 2014

Revision 1.1