G9731 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 4A Low Dropout Regulator with Enable

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 V_OUT is very close to V_IN. 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
G9731
6 _VPP
7 ^10kΩ
POK
VIN
8
VEN
5 _VIN
3,4 _VO
1
GND
C1 _R1
(optional)
2
ADJ
CPP
CIN
CO
1µF 20µF 20µF
R2
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: [phone]
http://www.gmt.com.tw
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