MIC39150 MICREL [Micrel Semiconductor], MIC39150 Datasheet
MIC39150
Manufacturer Part Number
MIC39150
Description
1.5A Low-Voltage Low-Dropout Regulator
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
1.MIC39150.pdf
(12 pages)
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MIC
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MICREL/麦瑞
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20 000
General Description
The MIC39150 and MIC39151 are 1.5A low-dropout linear
voltage regulators that provide a low voltage, high current
output with a minimum of external components. Utilizing
Micrel’s proprietary Super eta PNP™ pass element, the
MIC39150/1 offers extremely low dropout (typically 375mV at
1.5A) and low ground current (typically 17mA at 1.5A).
The MIC39150/1 is ideal for PC add-in cards that need to
convert from 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed
maximum dropout voltage of 500mV over all operating con-
ditions allows the MIC39150/1 to provide 2.5V from a supply
as low as 3V or 1.8V from a supply as low as 2.3V. The
MIC39150/1 also has fast transient response for heavy
switching applications. This device requires only 10 F of
output capacitance to maintain stability and achieve fast
transient response
The MIC39150/1 is fully protected with overcurrent limiting,
thermal shutdown, reversed-battery protection, reversed-
lead insertion, and reverse-leakage protection. The MIC39151
offers a TTL-logic compatible enable pin and an error flag that
indicates undervoltage and over current conditions. Offered
in fixed voltages of 2.5V and 1.8V, the MIC39150/1 comes in
the TO-220 and TO-263 packages and is an ideal upgrade to
older, NPN-based linear voltage regulators.
For applications requiring input voltage greater than 16V or
automotive load dump protection, see the MIC29150/1/2/3
family.
Typical Application
StrongARM is a trademark of Advanced RSIC Machines, Ltd.
May 2000
MIC39150/39151
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
3.3V
V
IN
MIC39150-2.5
IN
MIC39150
GND
OUT
10µF
tantalum
V
2.5V
OUT
1
Features
• 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery and reversed lead insertion protection
• Reversed-leakage protection
• Fast transient response
• TO-263 and TO-220 packaging
• TTL/CMOS compatible enable pin (MIC39151 only)
• Error flag output (MIC39151 only)
Applications
• Low-voltage digital ICs
• LDO linear regulator for PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Low-voltage microcontrollers
• StrongARM™ processor supply
1.5A Low-Voltage Low-Dropout Regulator
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5 to 1.8V conversion
SHUTDOWN
ENABLE
3.3V
V
MIC39150/39151
IN
MIC39151
MIC39151-2.5
EN
IN
100k
GND
FLG
OUT
10µF
tantalum
MIC39150/39151
ERROR FLAG
OUTPUT
V
2.5V
OUT
Micrel
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