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Global Mixed-mode Technology

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G9731 Datasheet

4A Low Dropout Regulator

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Global Mixed-mode Technology Inc.
G9731
4A Low Dropout Regulator with Enable
Features
„ 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
„ Motherboards
„ Peripheral Cards
„ Network Cards
„ Set Top Boxes
„ Notebook Computers
General Description
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 dis-
sipation while shutdown. The G9731 provides excel-
lent regulation over variations in line, load and tem-
perature. The G9731 provides a power OK signal to
indicate if the voltage level of VO reaches 92% of its
rating value.
The G9731 is available in the power SOP-8 (FD) pack-
age.
Ordering Information
ORDER
NUMBER
G9731F11U
Note: F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
Pin Configuration
MARKING
G9731
TEMP.
RANGE
-40°C~+85°C
PACKAGE
(Green)
SOP-8 (FD)
Typical Application Circuit
GND 1
G9731
8 VEN
ADJ 2
VO 3
Thermal
Pad
7 POK
6 VPP
VO 4
5 VIN
Top View
SOP-8 (FD)
* Thermal Pad can be connected to VIN
** Connect Thermal Pad to ground plate will
have better thermal performance
VPP (5V)
VIN
VO
C1 R1
(optional)
CPP
1µF
CIN
20µF
CO
20µF
R2
G9731
6 VPP
7 10kΩ
POK
8
VEN
5 VIN
3,4 VO
1
GND
2
ADJ
VIN
1. VO = 0.8 (R1+R2) Volts, R2<120kΩ is recommended
R2
2. C1 is not necessary. VO is also stable if C1 = 22pF~150pF
Ver: 0.4
Feb 14, 2011
TEL: 886-3-5788833
http://www.gmt.com.tw
1


Part Number G9731
Description 4A Low Dropout Regulator
Maker Global Mixed-mode Technology
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G9731 Datasheet PDF






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