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MIC37100 Datasheet, PDF (1/15 Pages) Micrel Semiconductor – 1A LOW VOLTAGE U CAP LDO REGULATOR | |||
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MIC37100/37101/37102
Micrel
MIC37100/37101/37102
1A Low-Voltage µCap LDO Regulator
General Description
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 Micrelâs proprietary Super βeta 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.
For other voltages, contact Micrel.
All support documentation can be found on Micrelâs web
site at www.micrel.com.
Features
⢠Fixed and adjustable output voltages to 1.24V
⢠µCap Regulator, 10µF ceramic output capacitor
stable
⢠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)
Applications
⢠LDO linear regulator for PC add-in cards
⢠PowerPC⢠power supplies
⢠High-efficiency linear power supplies
⢠SMPS post regulator
⢠Multimedia and PC processor supplies
⢠Battery chargers
⢠Low-voltage microcontrollers and digital logic
Typical Applications
VIN
3.3V
MIC37100
IN OUT
GND
2.5V
10µF
ceramic
2.5V/1A Regulator
Dropout
vs. Output Current
350
300
2.5VOUT
250
200
150
3.3VOUT
100
50
00
0.25 0.5 0.75
1
OUTPUT CURRENT (A)
Super βeta 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
September 2004
1
M9999-091604
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