MIC5231 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – Micropower μCap LDO Regulator Preliminary Information

MIC5231
Micrel
MIC5231
Micropower µCap LDO Regulator
Preliminary Information
General Description
The MIC5231 µCap low-dropout voltage regulator is intended
for low-output-current biasing applications. It features ex-
tremely low ground current, not greater than 4µA under all
load and temperature conditions, making it efficient and ideal
for keep-alive applications in devices such as notebook
computers.
The MIC5231 offers better than 2% initial accuracy and low
dropout (typically 150mV at 10mA output current). An output
capacitor is not required for stable operation, decreasing cost
and board space. Tiny ceramic chip capacitors may be used
to improve transient response.
The MIC5231 also features a control pin which allows the
regulator to be shut down when not required. Its shutdown-
state draws zero current, benefitting battery-powered appli-
cations.
The MIC5231 is available in fixed output voltages of 2.75V,
3.0V, 3.3V and 5V in the small SOT-23-5 IttyBitty™ package.
Contact Micrel for other voltage options.
Features
• Extremely low quiescent current—only 0.65µA
• No output capacitor requirement
• Stable with ceramic or tantalum capacitors
• IttyBitty™ SOT-23-5 surface-mount package
• 10mA output drive
• Low 150mV at 10mA dropout voltage
• Tight load and line regulation
• Low temperature coefficient
• Logic-level enable input
Applications
• Real time clocks
• SRAM backup
• Cellular telephones
• Laptop, notebook and palmtop computers
• Battery-powered equipment
• Bar code scanners
• SMPS post-regulator and dc-to-dc modules
Ordering Information
Part Number
MIC5231-2.75BM5
MIC5231-3.0BM5
MIC5231-3.3BM5
MIC5231-5.0BM5
Marking
LM2H
LM30
LM33
LM50
Voltage
2.75V
3.0V
3.3V
5.0V
Temperature Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Typical Application
MIC5231-5.0BM5
V_IN
6V
IN OUT
V_OUT
5V
EN
GND
5V Linear Regulator Application
IttyBitty is a trademark of Micrel, Inc.
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL + 1 [phone] FAX + 1 [phone]
June 2000
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MIC5231