MIC5234_11 Datasheet, PDF (1/16 Pages) Micrel Semiconductor – Low-Quiescent Current 150mA LDO Regulator

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 (I_Q = 20μA @ I_O = 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 [phone] • fax + 1 [phone] • http://www.micrel.com
September 2011
M9999-092711-B
[e-mail] or [phone]