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Global Mixed-mode Technology

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G977 Datasheet

7A Low Dropout Regulator

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Global Mixed-mode Technology
G977
7A Low Dropout Regulator with Enable
Features
„ Adjustable Output Low to 0.8V
„ Input Voltage as Low as 1V and VPP Voltage 5V
„ 140mV Dropout @ 7A, VO 1.05V
„ Over Current and Over Temperature Protection
„ Enable Pin
„ Low Reverse Leakage (Output to Input )
„ Power SOP-8 (FD) Packages with Thermal Pad
„ ±1.5% 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
Ordering Information
ORDER
NUMBER
G977F11U
Note: F1: SOP-8 (FD)
1: Bonding Code
U: Tape & Reel
MARKING
G977
General Description
The G977 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 7 amps. It operates with VPP voltage 5V and
output voltage programmable as low as 0.8V. The
G977 features ultra low dropout, ideal for applications
where VOUT is very close to VIN. Additionally, the G977
has an enable pin to further reduce power dissipation
while shutdown. The G977 provides excellent regula-
tion over variations in line, load and temperature. The
G977 provides a power OK signal to indicate if the
voltage level of VO reaches 92% of its rating value.
The G977 is available in the power SOP-8 (FD) pack-
age. It is adjustable using external resistors.
TEMP.
RANGE
-40°C~+85°C
PACKAGE
(Green)
SOP-8 (FD)
Pin Configuration
Typical Application Circuit
G977
GND 1
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
22µF
CO
22µF
R2
G977
6
VPP
POK 7 10kΩ
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
Mar 19, 2012
TEL: 886-3-5788833
http://www.gmt.com.tw
1


Part Number G977
Description 7A Low Dropout Regulator
Maker Global Mixed-mode Technology
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G977 Datasheet PDF






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