GMT G9731 4a low dropout regulator with enable Datasheet

G9731
Global Mixed-mode Technology Inc.
4A Low Dropout Regulator with Enable
Features
General Description
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The G9731 is a high performance positive voltage
regulator designed for use in applications requiring
very low Input voltage and very low dropout voltage at
up to 4 amps. It operates with VPP voltage 5V and
output voltage programmable as low as 0.8V. The
G9731 features ultra low dropout, ideal for applications
where VOUT is very close to VIN. Additionally, the
G9731 has an enable pin to further reduce power dissipation while shutdown. The G9731 provides excellent regulation over variations in line, load and temperature. The G9731 provides a power OK signal to
indicate if the voltage level of VO reaches 92% of its
rating value.
Adjustable Output Low to 0.8V
330mV Dropout @ 4A, VO 1.2V
Over Current and Over Temperature Protection
Enable Pin
Low Reverse Leakage (Output to Input )
Power SOP-8 (FD) Packages with Thermal Pad
±2% Output Voltage
VO Power OK Signal
VO Pull Low Resistance when Disable
VO Soft Start when Enable
Applications
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Motherboards
Peripheral Cards
„ Network Cards
„ Set Top Boxes
„ Notebook Computers
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The G9731 is available in the power SOP-8 (FD) package.
Ordering Information
ORDER
NUMBER
MARKING
G9731F11U
G9731
TEMP.
RANGE
PACKAGE
(Green)
-40°C~+85°C
SOP-8 (FD)
Note: F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
Pin Configuration
Typical Application Circuit
G9731
6
VPP (5V)
8
G9731
GND
8
1
5
VIN
VEN
3,4
VO
ADJ
2
7
POK
2
C1
(optional)
Thermal
Pad
VO
3
6
VPP
VO
4
5
VIN
CPP
1µF
CIN
20µF
R1
VPP
POK
7
10kΩ
VIN
VEN
VIN
GND
1
VO
ADJ
CO
20µF
R2
Top View
SOP-8 (FD)
* Thermal Pad can be connected to VIN
** Connect Thermal Pad to ground plate will
have better thermal performance
0.8 (R1+R2)
Volts, R2<120kΩ is recommended
R2
2. C1 is not necessary. VO is also stable if C1 = 22pF~150pF
1. VO =
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.4
Feb 14, 2011
1
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