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| GM6630X Datasheet, PDF (1/12 Pages) Gamma Microelectronics Inc. – Low ground current | |||
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2015/3/18
GM6630x Series
3.0A ULTRA LOW DROPOUT VOLTAGE
REGULATORS
Description
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).
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
applications. The device requires only 47μF of
output capacitance to maintain stability and
achieve fast transient response.
The GM66300/1/2 is fully protected with over
current limiting, thermal shutdown,
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.
The GM66302 is adjustable version, with On/Off
feature.
Features
ïµ 3.0A minimum guaranteed output current
ïµ 500mV maximum dropout voltage over
temperature, which is ideal for 3.0V to 2.5V
conversion and 2.5V to 1.8V conversion.
ïµ 1% initial accuracy
ïµ Low ground current
ïµ Current limiting and Thermal shutdown
ïµ Reversed-battery protection
ïµ Reversed-leakage protection
ïµ Fast transient response
ïµ Error flag output (GM66301 only)
ïµ Adjustable version (GM66302 only)
Application
ï® PC Add-in Cards
ï® High Efficiency Linear Power Supplies
ï® Multi-media and PC Processor Supplies
ï® Low Voltage Microcontrollers
ï® Automotive Electronics
Typical Application Circuits
VIN
3.3V
GM66300-2.5
VIN
VOUT
Gnd
VOUT
2.5V
47uF
Enable
Shutdown
VIN
3.3V
GM66301-2.5
Enable
Flag
Error Flag Output
Gnd VOUT
VOUT
2.5V
47uF
Enable
Shutdown
GM66302
Enable
VOUT
VOUT
VIN
1.0uF
R1
VIN Gnd Adj
R2 47uF
VOUT = 1.24V x (1+R1/R2)
For VOUT = 3.3V
R1 = 3.33K
R2 = 2K
www.gammamicro.com.tw 1
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