Global Mixed-mode Technology Inc.
G553
Power Distribution Switch
Features
125mΩ High-Side MOSFET
450mA Typical Current Limit with Foldback
Operating Range:2.7V to 5.5V
Under voltage Lockout
65µA Quiescent Supply Current
1µA Maximum Shutdown Supply Current
Logic Level Enable Pin, Available with
Active-High or Active-Low Version
No Reverse Current when Power Off
Deglitched Open-Drain Over-Current Flag
Output (
OC
)
Output Shutdown Pull-low Resister
Turn-on Soft Start 1.5ms Typical Rise Time
SOP-8 Packages
General Description
The G553 is an integrated 125mΩ power switch for
self-powered and bus-powered Universal Serial Bus
(USB) applications.
Several Protection features include current limiting
with foldback, and thermal shutdown to prevent catas-
trophic switch failure caused by increasing power dis-
sipation when continuous heavy loads or short circuit
occurs. And a built-in charge pump is used to drive the
N-channel MOSFET that is free of parasitic body diode
to eliminate any reversed current flow across the
switch when it is powered off.
OC
is open-drain output report over-current or
over-temperature event and has typical 9ms deglitch
timeout period.
Applications
High-Side Power Protection Switch
USB Power Management
USB Host and Self-Powered Bubs
USB Bus-Powered Hubs
Hot Plug-In Power Supplies
Battery-Charger Circuits
Ordering Information
ORDER
NUMBER
G553D1P11U
G553D2P11U
Note: P1: SOP-8
1: Bonding Code
U: Tape & Reel
MARKING
G553D1
G553D2
ENABLE
Active High
Active Low
Current Limit
0.45A
0.45A
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
SOP-8
SOP-8
Pin Configuration
Typical Application Circuit
G553
GND
IN
IN
EN (EN)
1
2
3
4
8
7
6
5
OUT
OUT
OUT
OC
G553
Power Supply
2.7V to 5.5V
IN
OUT
0.1µF
OC
EN(EN)
22µF
Load
*
1µF
ON
OFF
SOP-8
*:
1µF of input capacitor is enough in most application cases.
If the PCB trace of power rail to IN is long, larger input capacitor is necessary.
Ver: 1.5
Nov 12, 2009
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
