RT9703_07 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – 80mΩ, 3A Smart Universal Power Switch with Flag

RT9703
80mΩ, 3A Smart Universal Power Switch with Flag
General Description
The RT9703 is a low voltage, high performance single
N-MOSFET power switch, designed for power rail on/off
control with low R_DS(ON) ≈ 80mΩ and full protection
functions. The RT9703 equipped with a charge pump
circuitry to drive the internal MOSFET switch and a flag
output is available to indicate fault conditions against large
di/dt which may cause the supply to fall out of regulation.
In order to fit different application, an IP pin is offered for
current limit point setting, a resistor from IP to ground
sets the current limit for the switch.
Additional features include soft-start to limit inrush current
during plug-in, thermal shutdown to prevent catastrophic
switch failure from high-current loads, under-voltage
lockout (UVLO) to ensure that the device remains off
unless there is a valid input voltage present, a precision
resistor-programmable output current limit up to 3.5A.
Besides, the lower quiescent current as 30μA making this
device ideal for portable battery-operated equipment.
The RT9703 is available in SOP-8 package requiring
minimum board space and smallest components.
Ordering Information
RT9703
Package Type
S : SOP-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
RichTek Pb-free and Green 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.
`100%matte tin (Sn) plating.
Features
z Adjustable Current Limiting up to 3.5A
z Built-In (Typically 80mΩ) N-MOSFET
z Reverse Current Flow Blocking (no body diode) i.e.
Output Can Be Forced Higher than Input (Off-State)
z Low Supply Current :
`30μA Typical at Switch on State
`Less than 1μA Typical at Switch Off State
z Guaranteed 3A Continuous Load Current
z Wide Input Voltage Ranges : 2V to 5.5V
z Open-Drain Fault Flag Output
z Hot Plug-In Application (Soft-Start)
z 1.7V Typical Under-Voltage Lockout (UVLO)
z Thermal Shutdown Protection
z Smallest SOP-8 Package Minimizes Board Space
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z LCD Monitor, LCD-TV
z USB Power Module for ADSL
z Information Appliance and Set-Top Box
z Battery-Powered Equipment
z Hot-Plug Power Supplies
z ACPI Power Distribution
z PCI Bus Power Switching
z Motherboard & Notebook PCs
z PC Card Hot Swap Application
Pin Configurations
(TOP VIEW)
FLG
VOUT
2
VOUT
3
GND
4
8
IP
7
VIN
6
VIN
5
EN
SOP-8
DS9703-08 March 2007
www.richtek.com
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