MIC3775
Micrel
MIC3775
750mA
µ
Cap Low-Voltage Low-Dropout Regulator
Final
General Description
The MIC3775 is a 750mA low-dropout linear voltage regula-
tors that provides low-voltage, high-current output from an
extremely small package. Utilizing Micrel’s proprietary
Superβeta PNP™ pass element, the MIC3775 offers ex-
tremely 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 1.8V
or 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.
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
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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
For other voltages, contact Micrel.
Ordering Information
Part Number
MIC3775-1.5BMM
MIC3775-1.65BMM
MIC3775-1.8BMM
MIC3775-2.5BMM
MIC3775-3.0BMM
MIC3775-3.3BMM
MIC3775BMM
Voltage
1.5V
1.65V
1.8V
2.5V
3.0V
3.3V
Adj.
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
Typical Applications
300
Dropout
vs. Output Current
250
1.25V
R1
10µF
ceramic
DROPOUT (mV)
V
IN
2.5V
ENABLE
SHUTDOWN
MIC3775BMM
IN
OUT
EN
ADJ
GND
1.8V
OUT
200
150
100
50
0
0
0.25
0.5
0.75
OUTPUT CURRENT (A)
2.5V
OUT
3.3V
OUT
R2
1.25V/750mA Adjustable Regulator
Superβeta PNP is a trademark of Micrel, Inc.
PowerPC is a trademark of Motorola
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
March 2003
1
MIC3775
MICREL [ MICREL SEMICONDUCTOR ]
