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MIC5239-3.3BMM Datasheet(PDF) 1 Page - Micrel Semiconductor

Part # MIC5239-3.3BMM
Description  Low Quiescent Current 500mA 關Cap LDO Regulator
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC5239-3.3BMM Datasheet(HTML) 1 Page - Micrel Semiconductor

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MIC5239
Low Quiescent Current 500mA µCap
LDO Regulator
MLF and MicroLeadFrame is a registered trademark of Amkor Technologies
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
December 2007
M9999-121007
General Description
The MIC5239 is a low quiescent current, µCap low-dropout
regulator. With a maximum operating input voltage of 30V
and a quiescent current of 23µA, it is ideal for supplying
keep-alive power in systems with high voltage batteries.
Capable of 500mA output, the MIC5239 has a dropout
voltage of only 350mV. It can provide high output current
for applications such as USB.
As a µCap LDO, the MIC5239 is stable with either a
ceramic or a tantalum output capacitor. It only requires a
3.3µF output capacitor for stability.
The MIC5239 includes a logic compatible enable input and
an undervoltage error flag indicator. Other features of the
MIC5239 include thermal shutdown, current limit, overvolt-
age shutdown, reverse-leakage protection, and reverse-
battery protection.
Available in the thermally enhanced SOIC-8, MSOP-8 and
SOT-223, the MIC5239 comes in fixed 1.5V, 1.8V, 2.5V,
3.0V, 3.3V and 5.0V, and adjustable voltages. For other
output voltages, contact Micrel.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Features
• Ultra-low quiescent current (IQ = 23µA @IO = 100µA)
• Continuous 500mA output current
• Wide input range: 2.3V to 30V
• Low dropout voltage: 350mV @500mA
• ±1.0% initial output accuracy
• Stable with ceramic or tantalum output capacitor
• Logic compatible enable input
• Low output voltage error flag indicator
• Overcurrent protection
• Thermal shutdown
• Reverse-leakage protection
• Reverse-battery protection
• High-power SOIC-8, MSOP-8 and SOT-223 packages
Applications
• USB power supply
• Keep-alive supply in notebook and portable personal
computers
• Logic supply from high voltage batteries
• Automotive electronics
• Battery-powered systems
___________________________________________________________________________________________________________
Typical Application
IGND = 23µA
VOUT
3.0V/100µA
VIN
30V
IN
MIC5239
EN
OUT
GND
FLG
Regulator with Low IO and Low IQ
40
35
30
25
20
15
10
914
19
24
29
4
IOUT = 1mA
IOUT = 10µA
IOUT = 100µA
Ground Current vs. Input Voltage


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