G5255 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Current Limited Load Switch

Global Mixed-mode Technology Inc.
G5255
Current Limited Load Switch
Features
„ Input Voltage Range: 2.7V to 5.5V
„ Programmable Over-Current Threshold
„ 90mΩ Typical RDS(ON) at V_IN=5V
„ Only 2.5V Needed for ON/OFF Control
„ Under-Voltage Lockout
„ Thermal Shutdown
„ No Reverse Leakage Current
„ Open-drain Fault Flag Pin
„ TDFN2X2-6, MSOP-8 and SOP-8 Package
Applications
„ Hot Swap Supplies
„ Notebook Computers
„ Peripheral Ports
„ Personal Communication Devices
General Description
The G5255 is a current limited N-channel MOSFET
power switch designed for highside load switching
applications. The low RDS(ON) N-channel power
MOSFET is driven by a built-in charge pump which
generates a voltage higher than the supply voltage to
fully enhance the switch.
This switch operates with inputs ranging from 2.7V
to 5.5V, making it ideal for both 3.3V and 5V sys-
tems. An integrated current-limiting circuit protects
the input supply against large current which may
cause the supply to fall out of regulation. The
G5255 is also protected from thermal overload
which limits power dissipation and junction tem-
peratures. Current limit threshold is programmed
with a resistor from SET to ground. An open-drain
flag output is also available to indicate fault condi-
tion, including overcurrent, and thermal shutdown.
In shutdown mode, the supply current decreases to
less than 1µA. The reverse leakage current is also
less than 1µA.
The G5255 is available in TDFN2X2-6, MSOP-8 and
SOP-8 packages.
Ordering Information
ORDER
NUMBER
MARKING
G5255LRB1U
E55A
G5255HRB1U
E55B
G5255LP12U
G5255LA
G5255HP12U
G5255HA
G5255LP81U
G5255L
G5255HP81U
G5255H
Note: RB: TDFN2X2-6 P1: SOP-8 P8: MSOP-8
1 & 2: Bonding Code
U : Tape & Reel
ENABLE
Active Low
Active High
Active Low
Active High
Active High
Active High
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
TDFN2X2-6
TDFN2X2-6
SOP-8
SOP-8
MSOP-8
MSOP-8
Pin Configuration
IN 1
IN 2
GND 3
ON(ON) 4
G5255
SOP-8
8 OUT
IN 1
7 OUT
IN 2
6 SET GND 3
5 FLG ON(ON) 4
G5255
G5255
MSOP-8
SET 1
IN 2
OUT 3
Thermal
Pad
6 ON(ON)
5 GND
4 FLG
TDFN2X2-6
Note: Recommend connecting the Thermal Pad
to the GND for excellent power dissipation.
8 OUT
7 OUT
6 FLG
5 SET
Typical Application Circuit
10k
INPUT
ON (ON)
1µF
GND
FLG
IN _G5255 OUT
ON(ON)
GND
SET
RSET
FLG signal
0.47µF
GND
Ver: 0.8
Dec 02, 2010
TEL: [phone]
http://www.gmt.com.tw
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