General Description

The RT9703 is a low voltage, high performance single N-MOSFET power switch, designed for power rail on/off control with low RDS(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.

Features

● Adjustable Current Limiting up to 3.5A

● Built-In (Typically 80mΩ) N-MOSFET

● Reverse Current Flow Blocking (no body diode) i.e. Output Can Be Forced Higher than Input (Off-State)

● Low Supply Current :

► 30μA Typical at Switch on State

► Less than 1μA Typical at Switch Off State

● Guaranteed 3A Continuous Load Current

● Wide Input Voltage Ranges : 2V to 5.5V

● Open-Drain Fault Flag Output

● Hot Plug-In Application (Soft-Start)

● 1.7V Typical Under-Voltage Lockout (UVLO)

● Thermal Shutdown Protection

● Smallest SOP-8 Package Minimizes Board Space

● RoHS Compliant and 100 Lead (Pb)-Free

Applications

● LCD Monitor, LCD-TV

● USB Power Module for ADSL

● Information Appliance and Set-Top Box

● Battery-Powered Equipment

● Hot-Plug Power Supplies

● ACPI Power Distribution

● PCI Bus Power Switching

● Motherboard & Notebook PCs

● PC Card Hot Swap Application