Cap LDO Regulator
The MIC37100, MIC37101, and MIC37102 are 1A low-
dropout, linear voltage regulators that provide low-voltage,
high-current output from an extremely small package. Utiliz-
ing Micrel’s proprietary Super
PNP™ pass element, the
MIC37100/01/02 offers extremely low dropout (typically
280mV at 1A) and low ground current (typically 11mA at 1A).
The MIC37100 is a fixed output regulator offered in the
SOT-223 package. The MIC37101 and MIC37102 are fixed
and adjustable regulators, respectively, in a thermally en-
hanced power 8-lead SOIC (small outline package) and the
SOT-223 package. The MIC37102 is also available in the S-
PAK power package, for applications that require higher
power dissipation or higher operating ambient temperatures.
The MIC37100/01/02 is ideal for PC add-in cards that need
to convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V to
1.8V or lower. A guaranteed maximum dropout voltage of
500mV over all operating conditions allows the
MIC37100/01/02 to provide 2.5V from a supply as low as 3V
and 1.8V from a supply as low as 2.3V.
The MIC37100/01/02 is fully protected with overcurrent lim-
iting and thermal shutdown. Fixed output voltages of 1.5V,
1.65V, 1.8V, 2.5V and 3.3V are available on MIC37100/01
with adjustable output voltages to 1.24V on MIC37102.
• Fixed and adjustable output voltages to 1.24V
Cap Regulator, 10µF ceramic output capacitor
• 280mV typical dropout at 1A
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V, 1.65V or 1.5V conversion
• 1A minimum guaranteed output current
• 1% initial accuracy
• Low ground current
• Current limiting and thermal shutdown
• Reversed-leakage protection
• Fast transient response
• Low-profile SOT-223 package
• Power SO-8 package
• S-PAK package (MIC37102 only)
LDO linear regulator for PC add-in cards
PowerPC™ power supplies
High-efficiency linear power supplies
SMPS post regulator
Multimedia and PC processor supplies
Low-voltage microcontrollers and digital logic
For other voltages, contact Micrel.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
vs. Output Current
OUTPUT CURRENT (A)
PNP is a registered trademark of Micrel, Inc.
PowerPC is a trademark of IBM Corporation.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com