RT9712 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – 90mΩ, 1A/1.5A High-Side Dual Power Switches with Flag

®
RT9712
90mΩ, 1A/1.5A High-Side Dual Power Switches with Flag
General Description
The RT9712 power-distribution switches are designed to
fulfill the applications in heavy capacitive loads and short-
circuit situations. The device incorporates two 90mΩ N-
MOSFET power switches to fit power distribution systems
requiring multiple power switches in a single package.
During switching process, an internal charge pump is
designed to provide the gate drive for the purpose of power-
switch rise times and fall times controlling to minimize
the current surges. The charge pump can operate in supply
voltage as low as 2.7V and needs no external
components.
If the output load exceeds the current-limit threshold or a
short-circuit occurs.The RT9712 series pull the overcurrent
(FLGx) logic output low by switching into the constant-
current mode to maintain the output current in a safe level,
A thermal protection circuit turns off the switch to prevent
the device from damage when power dissipation is
increased by continuous heavy overloads and short-circuits
in the switch and finally cause the rise of the junction
temperature. The device automatically recovers when it
has sufficiently cooled down. The RT9712A/B are designed
for the current limit at typically 2A and RT9712C/D are
designed for the current limit at typically 1.5A. Internal
circuitry controls the switch to remain off until valid input
voltage is presented.
Pin Configurations
(TOP VIEW)
GND
VIN
2
EN1
3
EN2
4
8
FLG1
7
VOUT1
6
VOUT2
5
FLG2
RT9712A/C
GND
VIN
2
EN1
3
EN2
4
8
FLG1
7
VOUT1
6
VOUT2
5
FLG2
RT9712B/D
SOP-8/MSOP-8
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS9712-04 November 2012
Features
z 90mΩ N-MOSFET Switch
z Operating Voltage Range : 2.7V to 5.5V
z Reverse Blocking Current
z Under Voltage Lockout
z Deglitched Fault Report (FLGx)
z Thermal Protection with Foldback
z Over Current Protection
z Short Circuit Protection
z UL Approved−E219878
z Nemko Approved-NO49352
z RoHS Compliant and Halogen Free
Applications
z USB Peripherals
z Notebook PCs
Ordering Information
RT9712
Package Type
S : SOP-8
F : MSOP-8
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Output Current/ENx Function
A : 1.5A/Active High
B : 1.5A/Active Low
C : 1A/Active High
D : 1A/Active Low
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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