MIC5239
Low Quiescent Current 500mA Cap
LDO Regulator
General Description Features
The MIC5239 is a low quiescent current, Cap low-dropout Ultra-low quiescent current (I = 23A @I = 100A)
Q O
regulator. With a maximum operating input voltage of 30V
Continuous 500mA output current
and a quiescent current of 23A, it is ideal for supplying
Wide input range: 2.3V to 30V
keep-alive power in systems with high voltage batteries.
Low dropout voltage: 350mV @500mA
Capable of 500mA output, the MIC5239 has a dropout
1.0% initial output accuracy
voltage of only 350mV. It can provide high output current
Stable with ceramic or tantalum output capacitor
for applications such as USB.
Logic compatible enable input
As a Cap LDO, the MIC5239 is stable with either a
ceramic or a tantalum output capacitor. It only requires a
Low output voltage error flag indicator
3.3F output capacitor for stability.
Overcurrent protection
The MIC5239 includes a logic compatible enable input and
Thermal shutdown
an undervoltage error flag indicator. Other features of the
Reverse-leakage protection
MIC5239 include thermal shutdown, current limit, overvolt-
Reverse-battery protection
age shutdown, reverse-leakage protection, and reverse-
battery protection. High-power SOIC-8, MSOP-8 and SOT-223 packages
Available in the thermally enhanced SOIC-8, MSOP-8 and
Applications
SOT-223, the MIC5239 comes in fixed 1.5V, 1.8V, 2.5V,
USB power supply
3.0V, 3.3V and 5.0V, and adjustable voltages. For other
output voltages, contact Micrel. Keep-alive supply in notebook and portable personal
computers
All support documentation can be found on Micrels web
Logic supply from high voltage batteries
site at: www.micrel.com.
Automotive electronics
Battery-powered systems
___________________________________________________________________________________________________________
Typical Application
40
35
I = 1mA
OUT
MIC5239
I = 100A
30 OUT
V V
IN OUT
IN OUT
30V 3.0V/100A
25
I = 23A
EN FLG GND
20
GND
I = 10A
OUT
15
10
4 914 19 24 29
Regulator with Low I and Low I
O Q
Ground Current vs. Input Voltage
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 Micrel MIC5239
Ordering Information
Part Number
(1)
Voltage Junction Temp. Range Package
Standard Pb-Free
MIC5239-1.5BM MIC5239-1.5YM 1.5V 40C to +125C 8-pin SOIC
MIC5239-1.5BMM MIC5239-1.5YMM 1.5V 40C to +125C 8-pin MSOP
MIC5239-1.5BS MIC5239-1.5YS 1.5V 40C to +125C SOT-223
MIC5239-1.8BM MIC5239-1.8YM 1.8V 40C to +125C 8-pin SOIC
MIC5239-1.8BMM MIC5239-1.8YMM 1.8V 40C to +125C 8-pin MSOP
MIC5239-1.8BS MIC5239-1.8YS 1.8V 40C to +125C SOT-223
MIC5239-2.5BM MIC5239-2.5YM 2.5V 40C to +125C 8-pin SOIC
MIC5239-2.5BMM MIC5239-2.5YMM 2.5V 40C to +125C 8-pin MSOP
MIC5239-2.5BS MIC5239-2.5YS 2.5V 40C to +125C SOT-223
MIC5239-3.0BM MIC5239-3.0YM 3.0V 40C to +125C 8-pin SOIC
MIC5239-3.0BMM MIC5239-3.0YMM 3.0V 40C to +125C 8-pin MSOP
MIC5239-3.0BS MIC5239-3.0YS 3.0V 40C to +125C SOT-223
MIC5239-3.3BM MIC5239-3.3YM 3.3V 40C to +125C 8-pin SOIC
MIC5239-3.3BMM MIC5239-3.3YMM 3.3V 40C to +125C 8-pin MSOP
MIC5239-3.3BS MIC5239-3.3YS 3.3V 40C to +125C SOT-223
MIC5239-5.0BM MIC5239-5.0YM 5.0V 40C to +125C 8-pin SOIC
MIC5239-5.0BMM MIC5239-5.0YMM 5.0V 40C to +125C 8-pin MSOP
MIC5239-5.0BS MIC5239-5.0YS 5.0V 40C to +125C SOT-223
MIC5239BM MIC5239YM ADJ 40C to +125C 8-pin SOIC
MIC5239BMM MIC5239YMM ADJ 40C to +125C 8-pin MSOP
Note:
1. Other Voltages available. Contact Micrel for details.
M9999-121007
December 2007 2