RT9722
145mΩ, 1.5A Power Switch with Programmable Current Limit
General Description
Features
z Programmable Current Limit : 0.2A to 1.5A
z Low Quiescent Current : 10μA
z Low Shutdown Current : 0.1μA
z 145mΩ Switch On Resistance
z Operating Voltage Range : 2.4V to 5.5V
z Under Voltage Lockout
The RT9722 is a cost effective, low voltage, single
P-MOSFET high side power switch IC. Typical 145mΩ
switch on resistance and 10μA quiescent current are
realized in this IC. In order to fit different application, a
SET pin is offered for current limit point setting, a resistor
from SET to Ground sets the current limit for this switch.
z Thermal Shutdown Protection
z RoHS Compliant and Halogen Free
In addition, the RT9722 integrates a thermal shutdown
circuit and under voltage lockout circuit for overall
protection, and a FLAG output with delay is available to
indicate fault conditions to the local controller.
Applications
z HandheldDevices
z Hot Swap Supplies
z Notebooks
The RT9722 is an ideal solution for high side power load
switch and can support flexible applications since it is
available in various package such as WDFN-6L 2x2,
SOT-23-5 and SOT-23-6.
z Peripheral Ports
z Personal CommunicationDevices
Ordering Information
RT9722
Pin Configurations
Package Type
B : SOT-23-5
E : SOT-23-6
(TOP VIEW)
VIN
EN/EN
QW : WDFN-6L 2x2 (W-Type)
5
4
Lead Plating System
G : Green (Halogen Free and Pb Free)
2
3
EN Function
A : Active High
B : Active Low
VOUT GND SET
SOT-23-5
VIN
FLG EN/EN
Note :
Richtek products are :
6
5
2
4
3
` 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.
VOUT GND SET
SOT-23-6
1
2
3
6
5
4
SET
VIN
EN/EN
NC
7
VOUT
FLG
WDFN-6L 2x2
DS9722-00 August 2011
www.richtek.com
1