MIC5236 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – Low Quiescent Current μCap LDO Regulator Preliminary Information

MIC5236
Micrel
MIC5236
Low Quiescent Current µCap 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
MIC5236
V_IN
IN OUT
30V
EN ERR
GND
V_OUT
3.0V/100µA
I_GND = 20µA
Regulator with Low I_O and Low I_Q
MIC5236
V_IN
IN OUT
5V
EN ADJ
GND
MIC5236
V_IN
IN OUT
V_OUT
5V
EN ERR
47k
3.0V/150mA
C_OUT
GND
V_ERR
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 [phone] • fax + 1 [phone] • http://www.micrel.com
November 2000
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MIC5236