2010/3/2
GM66300 Series
3.0A ULTRA LOW DROPOUT VOLTAGE
REGULATORS
Description
Features
The GM66300, GM66301 and GM66302 are
3.0A, low dropout linear voltage regulators that
provide a low voltage, high-current output with a
minimum of external components. Utilizing
proprietary Super beta PNP pass element, the
GM66300/1/2 offers extremely low dropout
(typically 400mV at 3.0A) and low ground current
(typically 36mA at 3.0A).
3.0A minimum guaranteed output current
500mV maximum dropout voltage over
temperature, which is ideal for 3.0V to 2.5V
conversion and 2.5V to 1.8V conversion.
1% initial accuracy
Low ground current
Current limiting and Thermal shutdown
Reversed-battery protection
Reversed-leakage protection
Fast transient response
The GM66300/1/2 is ideal for PC add-in cards
that need to convert from standard 3.3V to 2.5V
or 2.5V to 1.8V. A guaranteed maximum dropout
voltage of 500mV over all operating conditions
allows the GM66300/1/2 to provide 2.5V from a
supply as low as 3V, and 1.8V from a supply as
low as 2.5V. The GM66300/1/2 also has fast
transient response for heavy switching
Error flag output (GM66301 only)
Adjustable version (GM66302 only)
applications. The device requires only 47µF of
output capacitance to maintain stability and
achieve fast transient response.
Application
The GM66300/1/2 is fully protected with over
current limiting, thermal shutdown,
PC Add-in Cards
reversed-battery protection, reversed-leakage
protection, and reversed-lead insertion. The
GM66301 offers a TTL-logic compatible enable
pin and an error flag that indicates under voltage
and over current conditions. Offered in fixed
voltages, the GM66300/1 comes in the TO-220
and TO-263 packages and is an ideal upgrade to
older, NPN-based linear voltage regulators.
High Efficiency Linear Power Supplies
Multi-media and PC Processor Supplies
Low Voltage Microcontrollers
Automotive Electronics
The GM66302 is adjustable version, with On/Off
feature.
Typical Application Circuits
GM66300-2.5
GM66301-2.5
Enable
VIN
Error Flag Output
Enable
Flag
VOUT
VOUT
VIN
VOUT
Shutdown
3.3V
2.5V
Gnd
VIN
47uF
VOUT
2.5V
Gnd
3.3V
47uF
GM66302
Enable
Shutdown
VOUT
Enable
VOUT
Adj
VIN
VIN
Gnd
1.0uF
47uF
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