MIC37100-3.3WS

 

MIC37100/37101/37102 

1A Low-Voltage µCap LDO 

 

 

 

Super βeta PNP is a registered trademark of Micrel, Inc. 
PowerPC is a registered trademark of IBM Corporation

 

 

 

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com 

September 2007

 

 

M9999-090607 

 

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. 
Utilizing Micrel’s 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 
enhanced power 8-pin 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 
limiting 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. 
Data sheets and support documentation can be found on 
Micrel’s 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 Application 

 

IN

2.5V

V

IN

3.3V

10F
ceramic

OUT

GND

MIC37100

 

2.5V/1A Regulator 

0

50

100

150

200

250

300

350

0

0.25

0.5

0.75

1

DROP

O

UT

 (

m

V)

OUTPUT CURRENT (A)

Dropout

vs. Output Current

2.5V

OUT

3.3V

OUT

 

MIC37100-3.3WS Datasheet Related Products:
MIC37100-3.3WS Information:
Part No.
MIC37100-3.3WS
Description
IC REG LDO 3.3V 1A SOT223
File Size
718955 bytes
Page Size
612 x 792 pts (letter)
All Pages
15
Manufacturer
Micrel, Inc.
Homepage
http://www.micrel.com/
Logo