MIC5232

10mA Ultra-Low Quiescent Current

µCap LDO

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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

November 2006

1

M9999-112006-B

General Description

The MIC5232 is an ultra-low quiescent current, low-

dropout linear regulator that is capable of operating

from a single-cell lithium ion battery. Consuming only

MIC5232 is ideal for stand-by applications like

powering real-time clocks or memory in battery

operated electronics.

The MIC5232 is capable of providing 10mA of output

current and has low output noise, providing a small,

efficient solution ideal for any keep-alive application.

Including reverse current protection, keeping reverse

The MIC5232 is a µCap design, operating with very

small ceramic output capacitors for stability, reducing

required board space and component cost.

The MIC5232 is available in fixed output voltages in

the miniature 6-pin 2mm x 2mm MLF

thin SOT-23-5 package with an operating junction

temperature range of -40°C to 125°C.

Features

• Input voltage range: 2.7V to 7.0V

• Stable with 0.47µF ceramic output capacitor

• Low dropout voltage of 100mV @ 10mA

• Reverse Battery Protection

• High output accuracy:

– +2.0% initial accuracy

– +3.0% over temperature

• Logic-Level Enable Input

• Lead-Free Thin SOT-23-5 Package

• Tight Load and Line Regulation

Applications

• Real-Time Clock Power Supply

• Stand-by Power Supply

• SRAM Memory Back-up Supply

• Cellular Telephones and Notebook Computers

Typical Application

VIN

VOUT

EN

GND

MIC5232-1.2YD5

3.6V

1.2V

0.47µF

ceramic

1µF

0

0.3

0.6

0.9

1.2

1.5

1.8

2.1

2.4

2.7

3.0

2.5 3 3.5 4 4.5 5 5.5 6 6.5 7

INPUT VOLTAGE (V)

Ground Pin Current

vs. Input Voltage

1.5 Real-Time Clock Back-up Supply