RT9701
100mΩ Power Distribution Switches
Ω
General Description
The RT9701 is an integrated 100mΩ power switch for
self-powered and bus-powered Universal Series Bus
(USB) applications. A built-in charge pump is used to
drive the N-Channel
MOSFET that is free of parasitic
body diode to eliminate any reversed current flow across
the switch when it is powered off. Its low quiescent current
(23μA)
and small package (SOT-23-5) is particularly
suitable in battery-powered portable equipment.
Several protection functions include soft start to limit
inrush current during plug-in, current limiting at 1.5A to
meet USB power requirement, and thermal shutdown to
protect damage under over current conditions.
Features
Ω
100mΩ Typ. High-Side NMOSFET (SOT-23-5)
Guaranteed 1.1A Continuous Current
1.5A Current Limit
Small
SOT-23-5
Package Minimizes Board Space
Soft Start
Thermal Protection
Low 23μA Supply Current
μ
Wide Input Voltage Range : 2.2V to 6V
UL Approved - #E219878
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Battery-Powered Equipment
Motherboard USB Power Switch
USB Device Power Switch
Hot-Plug Power Supplies
Battery-Charger Circuits
Ordering Information
RT9701
Package Type
B : SOT-23-5
BL : SOT-23-5 (L-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Pin Configurations
(TOP VIEW)
VOUT
GND
VIN
1
2
3
4
EN
5
VOUT
VOUT
GND
VIN
1
2
3
4
VIN
5
VOUT
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.
SOT-23-5
SOT-23-5
(L-Type)
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
Typical Application Circuit
V
IN
C
IN
1uF
RT9701CBL
VIN
VOUT
VIN
GND
VOUT
V
OUT
* C
OUT
470uF
* 470uF, Low ESR Electrolytic
DS9701-13 March 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
