MIC5256 Просмотр технического описания (PDF) - Micrel

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MIC5256

150mA µCap LDO with Error Flag

Micrel 

MIC5256

150mA µCap LDO with Error Flag

General Description

The MIC5256 is an efficient, precise CMOS voltage

regulator. It offers better than 1% initial accuracy,

extremely low-dropout voltage (typically 135mV at 150mA)

and low ground current (typically 90µA) over load. The

MIC5256 features an error flag that indicates an output

fault condition such as overcurrent, thermal shutdown and

dropout.

Designed specifically for handheld and battery-powered

devices, the MIC5256 provides a TTL-logic-compatible

enable pin. When disabled, power consumption drops

nearly to zero.

The MIC5256 also works with low-ESR ceramic

capacitors, reducing the amount of board space necessary

for power applications, critical in hand-held wireless

devices.

Key features include current limit, thermal shutdown, faster

transient response, and an active clamp to speed up

device turnoff. Available in the IttyBitty® SOT-23-5

package and the new Thin SOT-23-5, which offers the

same footprint as the standard IttyBitty® SOT-23-5, but

only 1mm tall. The MIC5256 offers a range of output

voltages.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Input voltage range: 2.7V to 6.0V

• Thin SOT package: 1mm height

• Error flag indicates fault condition

• Stable with ceramic output capacitor

• Ultralow dropout: 135mV @ 150mA

• High output accuracy:

– 1.0% initial accuracy

– 2.0% over temperature

• Low quiescent current:90µA

• Tight load and line regulation

• Thermal-shutdown and current-limit protection

• “Zero” off-mode current

• TTL logic-controlled enable input

Applications

• Cellular phones and pagers

• Cellular accessories

• Battery-powered equipment

• Laptop, notebook, and palmtop computers

• Consumer/personal electronics

___________________________________________________________________________________________________________

Typical Application

Low-Noise Regulator Application

IttyBitty 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

August 2010

1

M9999-080510

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