Preliminary
RT9711
80mΩ, 1.5A High-Side Power Switches with Flag
General Description
Features
z Compliant to USB Specifications
The RT9711 is a low voltage, singleN-Channel MOSFET
high-side power switch, optimized for self-powered and
bus- powered Universal Serial Bus (USB) applications.
The RT9711 equipped with a charge pump circuitry to drive
z Built-In N-Channel MOSFET
`Typical RDS(ON) : 80mΩ (SOT-23-5), 90mΩ (SOP-8)
z Output Can Be Forced Higher Than Input (Off-State)
z Low Supply Current :
the internal MOSFET switch; the switch's low RDS(ON)
,
25μA Typical at Switch On State
1μA Typical at Switch Off State
z Guaranteed 1.5A Continuous Load Current
z Wide Input Voltage Ranges : 2.5V to 5.5V
z Open-Drain Fault Flag Output
80mΩ, meets USB voltage drop requirements; and a flag
output is available to indicate fault conditions to the local
USB controller.
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. The maximum
current is limited to typically 2.5A in dual ports in
accordance with the USB power requirements, lower
quiescent current as 25μA making this device ideal for
portable battery-operated equipment.
z Hot Plug-In Application (Soft-Start)
z 1.7V Typical Under-Voltage Lockout (UVLO)
z Current Limiting Protection
z Thermal Shutdown Protection
z Reverse Current Flow Blocking (no body diode)
z UL Approved−E219878
z RoHS Compliant and 100% Lead (Pb)-Free
The RT9711 is available in SOT-23-5 and SOP-8 packages
requiring minimum board space and smallest components.
Applications
z USB Bus/Self Powered Hubs
z USB Peripherals
Ordering Information
z ACPI PowerDistribution
z PC Card Hot Swap
RT9711
Package Type
B : SOT-23-5
S : SOP-8
z Notebook, Motherboard PCs
z Battery-Powered Equipment
z Hot-Plug Power Supplies
z Battery-Charger Circuits
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Pin Configurations
Note :
(TOP VIEW)
RichTek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
VOUT
VIN
FLG
GND
EN
1
2
3
5
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
4
SOT-23-5
Marking Information
GND
8
VOUT
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
VIN
VIN
EN
2
3
4
7
6
5
VOUT
VOUT
FLG
SOP-8
DS9711-04 March 2007
www.richtek.com
1