MIC5236
Micrel
MIC5236
Low Quiescent Current
µ
Cap LDO Regulator
Preliminary Information
General Description
The MIC5236 is a low quiescent current,
µCap
low-dropout
regulator. With a maximum operating input voltage of 30V
and a quiescent current of 20µA, 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 –20V to +60V.
As a
µCap
LDO, the MIC5236 is stable with either a ceramic
or a tantalum output capacitor. It only requires a 1.0µF 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
• Ultra-low quiescent current (I
Q
= 20µA @I
O
= 100µA)
• Wide input range: 2.3V to 30V
• Low dropout:
230mV @50mA;
300mV @150mA
• Fixed 2.5V, 3.0V, 3.3V, 5.0V, and Adjustable outputs
•
±1.0%
initial output accuracy
• Stable with ceramic or tantalum output capacitor
• Load dump protection: –20V to +60V input transient
survivability
• Logic compatible enable input
• Low output flag indicator
• Overcurrent protection
• Thermal shutdown
• Reverse-leakage protection
• Reverse-battery protection
• High-power SOP-8 and MSOP-8
Applications
• Keep-alive supply in notebook and
portable personal computers
• Logic supply from high-voltage batteries
• Automotive electronics
• Battery-powered systems
Typical Application
V
IN
30V
MIC5236
IN
OUT
EN
ERR
GND
V
OUT
3.0V/100µA
I
GND
= 20µA
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. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
November 2000
1
MIC5236
MICREL [ MICREL SEMICONDUCTOR ]
