MIC3775
750mA µCap Low-Voltage
Low-Dropout Regulator
General Description
The MIC3775 is a 750mA low-dropout linear voltage
regulators that provides low-voltage, high-current output
from an extremely small package. Utilizing Micrel’s
proprietary Superβeta PNP
®
pass element, the MIC3775
offers extremely low-dropout (typically 280mV at 750mA)
and low ground current (typically 7.5mA at 750mA).
The MIC3775 is ideal for PC add-in cards that need to
convert from standard 5V to 3.3V or 3.0V, 3.3V to 2.5V or
2.5V to 1.8Vor 1.65V. A guaranteed maximum dropout
voltage of 500mV over all operating conditions allows the
MIC3775 to provide 2.5V from a supply as low as 3.0V and
1.8V or 1.5V from a supply as low as 2.25V.
The MIC3775 is fully protected with overcurrent limiting,
thermal shutdown, and reversed-leakage protection. Fixed
and adjustable output voltage options are available with an
operating temperature range of –40°C to +125°C.
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
•
280mV typical dropout at 750mA
–
Ideal for 3.0V to 2.5V conversion
–
Ideal for 2.5V to 1.8V or 1.65V conversion
•
Stable with ceramic capacitor
•
750mA minimum guaranteed output current
•
1% initial accuracy
•
Low ground current
•
Current limiting and thermal shutdown
•
Reversed-leakage protection
•
Fast transient response
•
Low-profile power MSOP-8 package
Applications
•
•
•
•
•
•
•
•
Fiber optic modules
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
1.25V/750mA Adjustable Regulator
PowerPC is a trademark of IBM Corp.
Super
βeta
PNP is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
December 2006
1
M9999-121906
MICREL [ MICREL SEMICONDUCTOR ]
