G923_15 Datasheet, PDF (1/2 Pages) Global Mixed-mode Technology Inc – 300mA High PSRR LDO Regulators

Global Mixed-mode Technology Inc.
G923
300mA High PSRR LDO Regulators
Features
„ Low, 90µA No-Load Supply Current
„ Guaranteed 300mA Output Current
„ Dropout Voltage is 200mV @ 150mA Load
„ PSRR=65dB @ 120Hz
„ Over-Temperature Protection and Short-Circuit
Protection
„ Two Modes of Operation ----
Fixed Mode: 1.50V~5.00V
Adjustable Mode: from 1.25V to 5.50V
„ Max. Supply Current in Shutdown Mode < 1µA
„ Low Output Noise at 238µV_RMS
„ Stable with low cost ceramic capacitors
Applications
„ Notebook Computers
„ Cellular Phones
„ PDAs
„ Digital still Camera and Video Recorders
„ Hand-Held Devices
„ Audio Codec
General Description
The G923 is a low supply current, high PSRR, and low
dropout linear regulator that comes in a space saving
SOT-23-5 package. The supply current at no-load is
90µA. In the shutdown mode, the maximum supply
current is less than 1µA. Operating voltage range of
the G923 is from 2.50V to 5.50V. The over-current
protection limit is set at 550mA typical. An over- tem-
perature protection circuit is built-in in the G923 to
prevent thermal overload. These power saving fea-
tures make the G923 ideal for use in the bat-
tery-powered applications such as notebook com-
puters, cellular phones, and PDA’s.
The G923 has two modes of operation. When the SET
pin is connected to ground, its output is a pre-set value:
1.50V~5.00V. There is no external component needed
to decide the output voltage. When an output other
than the preset value is needed, two external resistors
should be used as a voltage divider. The output volt-
age is then decided by the resistor ratio. The G923
comes in a space saving SOT-23-5 package.
Pin Configuration
Typical Application Circuit
SHDN 1
5 SET
GND 2
G923
G963
IN 3
SOT-23-5
4 OUT
＋ _CIN
BATTERY ^{_ 1µF}
IN
OUT
G923
SHDN
GND
SET
Fixed mode
OUTPUT
VOLTAGE
C_OUT
4.7µF
IN
OUT
＋
R1
G923
SET
－ _BATTERY ^CIN
SHDN
1µF
R2
GND
OUTPUT
VOLTAGE
C_OUT
4.7µF
Adjustable mode
Ver: 1.8
Apr 20, 2011
TEL: [phone]
http://www.gmt.com.tw
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