MIC5236
Micrel
MIC5236
Low Quiescent Current
碌
Cap LDO Regulator
Preliminary Information
General Description
The MIC5236 is a low quiescent current,
碌Cap
low-dropout
regulator. With a maximum operating input voltage of 30V
and a quiescent current of 20碌A(chǔ), it is ideal for supplying keep-
alive power in systems with high-voltage batteries.
Capable of 150mA output, the MIC5236 has a dropout
voltage of only 300mV. It can also survive an input transient
of 鈥?0V to +60V.
As a
碌Cap
LDO, the MIC5236 is stable with either a ceramic
or a tantalum output capacitor. It only requires a 1.0碌F output
capacitor for stability.
The MIC5236 includes a logic compatible enable input and an
undervoltage error flag indicator. Other features of the
MIC5236 include thermal shutdown, current-limit, overvolt-
age shutdown, load-dump protection, reverse leakage pro-
tections, and reverse battery protection.
Available in the thermally enhanced SOP-8 and MSOP-8, the
MIC5236 comes in fixed 2.5V, 3.0V, 3.3V, 5.0V, and adjust-
able voltages. For other output voltages, contact Micrel.
Features
鈥?Ultra-low quiescent current (I
Q
= 20碌A(chǔ) @I
O
= 100碌A(chǔ))
鈥?Wide input range: 2.3V to 30V
鈥?Low dropout:
230mV @50mA;
300mV @150mA
鈥?Fixed 2.5V, 3.0V, 3.3V, 5.0V, and Adjustable outputs
鈥?/div>
鹵1.0%
initial output accuracy
鈥?Stable with ceramic or tantalum output capacitor
鈥?Load dump protection: 鈥?0V to +60V input transient
survivability
鈥?Logic compatible enable input
鈥?Low output flag indicator
鈥?Overcurrent protection
鈥?Thermal shutdown
鈥?Reverse-leakage protection
鈥?Reverse-battery protection
鈥?High-power SOP-8 and MSOP-8
Applications
鈥?Keep-alive supply in notebook and
portable personal computers
鈥?Logic supply from high-voltage batteries
鈥?Automotive electronics
鈥?Battery-powered systems
Typical Application
V
IN
30V
MIC5236
IN
OUT
EN
ERR
GND
V
OUT
3.0V/100碌A(chǔ)
I
GND
= 20碌A(chǔ)
V
IN
5V
MIC5236
IN
OUT
47k
EN
ERR
GND
V
OUT
3.0V/150mA
C
OUT
V
ERR
Regulator with Low I
O
and Low I
Q
V
IN
5V
MIC5236
IN
OUT
EN
ADJ
GND
Regulator with Error Output
V
OUT
3.0V/150mA
Regulator with Adjustable Output
Micrel, Inc. 鈥?1849 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel + 1 (408) 944-0800 鈥?fax + 1 (408) 944-0970 鈥?http://www.micrel.com
November 2000
1
MIC5236
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