MIC5234 查看數據表（PDF） - Micrel

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MIC5234

Low-Quiescent Current 150mA LDO Regulator

Micrel 

MIC5234

Low-Quiescent Current

150mA LDO Regulator

General Description

Features

The MIC5234 is a low-quiescent current, μCap low-

dropout regulator. With a maximum operating input voltage

of 30V and quiescent current of 20μA, it is ideal for

supplying keep-alive power in systems with high-voltage

batteries.

Capable of 150mA output, the MIC5234 has a dropout

voltage of only 320mV. It can also survive an input

transient of –20V to +32V. The MIC5234 requires only a

2.2μF output capacitor for stable operation.

The MIC5234 includes a logic compatible enable input.

Other features of the MIC5234 include thermal shutdown,

current limit, overvoltage shutdown, load dump protection,

reverse-leakage and reverse battery protection.

The MIC5234 is available in an 8-pin ePad SOIC package

with a junction operating range from –40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

• Ultra-low quiescent current (IQ = 20μA @ IO = 100μA)

• Wide input voltage range: 2.3V to 30V

• Low dropout:

− 230mV @50mA

− 320mV @150mA

• Adjustable output voltage

• Typical ±1.0% initial output accuracy

• Logic compatible enable input

• Overcurrent protection

• Thermal-shutdown protection

• Reverse-leakage and reverse-battery protection

• Thermally enhanced 8-pin ePad SOIC package

Applications

• “Keep-alive” supply in notebook and portable personal

computers

• Logic supply from high-voltage batteries

• Automotive electronics

• Battery-powered systems

_________________________________________________________________________________________________________________________

Typical Application

Regulator with Adjustable Output

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

September 2011

M9999-092711-B

hbwhelp@micrel.com or (408) 955-1690

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