MIC39150_09 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – 1.5A, Low-Voltage Low-Dropout Regulator

MIC39150/39151/39152
1.5A, Low-Voltage Low-Dropout
Regulator
General Description
The MIC39150, MIC39151, and MIC39152 are 1.5A LDO
voltage regulators that provide a low voltage, high current
output with a minimum of external components. Utilizing
Micrel’s proprietary Super βeta PNP^® pass element, the
MIC39150/1/2 offers extremely low dropout (typically
375mV at 1.5A) and low ground current (typically 17mA at
1.5A).
The MIC39150/1/2 are ideal for PC add-in cards that need
to convert from 3.3V to 2.5V or 2.5V to 1.8V with a
guaranteed maximum dropout voltage of 500mV over all
operating conditions. The MIC39150/1/2 exhibit fast
transient response for heavy switching applications and
requires only 10µF of output capacitance to maintain
stability and achieve fast transient response.
The MIC39150/1/2 is fully protected with current limiting,
thermal shutdown, reversed-battery protection/lead
insertion, and reverse-leakage protection. The MIC39151
offers a TTL-logic compatible enable pin and an error flag
that indicates undervoltage and overcurrent conditions.
Offered in fixed voltages of 2.5V, 1.8V and 1.65V, the
MIC39150/1 comes in the TO-220 and TO-263 (D²Pak)
packages. The MIC39152 adjustable option allows
programming the output voltage anywhere between 1.24V
and 15.5V and comes in 5-Pin, TO-263 (D²Pak) and
TO-252 (D-Pak) packages.
For applications requiring input voltage greater than 16V or
automotive load dump protection, see the MIC29150/1/2/3
family.
Features
• 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
– Ideal for 3.0V to 2.5V conversion
– Ideal for 2.5 to 1.8V or 1.65V conversion
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery and reversed lead insertion protection
• Reversed-leakage protection
• Fast transient response
• TTL/CMOS compatible enable pin (MIC39151/2 only)
• Error flag output (MIC39151 only)
• Adjustable output (MIC39152 only)
• Power D-Pak package (TO-252) Adjustable only
• Power D²Pak package (TO-263)
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
Typical Application**
MIC39150
MIC39151
MIC39152 Adjustable Output Application
(*See Minimum Load Current Section)
Super ßeta PNP is a registered trademark of Micrel, Inc.
StrongARM is a trademark of Advanced RSIC Machines, Ltd.
**See Thermal Design Section
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
October 2009
M9999-102309-A