G977 - GMT

G977
Global Mixed-mode Technology
7A Low Dropout Regulator with Enable
Features
General Description
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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 regulation 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.
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
The G977 is available in the power SOP-8 (FD) package. It is adjustable using external resistors.
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Motherboards
Peripheral Cards
„ Network Cards
„ Set Top Boxes
„ Notebook Computers
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Ordering Information
ORDER
NUMBER
MARKING
G977F11U
G977
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
G977
6
VPP (5V)
G977
GND
8
8
1
5
VIN
VEN
3,4
VO
ADJ
2
VO
3
VO
4
Thermal
Pad
7
2
POK
C1
(optional)
6
VPP
5
VIN
CPP
1µF
CIN
22µF
R1
VPP
POK
7 10kΩ
VIN
VEN
VIN
1
GND
VO
ADJ
CO
22µF
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
Mar 19, 2012
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