RT9722 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – 145mΩ, 1.5A Power Switch with Programmable Current Limit

RT9722
145mΩ, 1.5A Power Switch with Programmable Current Limit
General Description
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.
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.
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.
Ordering Information
RT9722
Package Type
B : SOT-23-5
E : SOT-23-6
QW : WDFN-6L 2x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
EN Function
A : Active High
B : Active Low
Note :
Richtek 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.
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
z Thermal Shutdown Protection
z RoHS Compliant and Halogen Free
Applications
z Handheld Devices
z Hot Swap Supplies
z Notebooks
z Peripheral Ports
z Personal Communication Devices
Pin Configurations
(TOP VIEW)
VIN EN/EN
5
4
2
3
VOUT GND SET
SOT-23-5
VIN FLG EN/EN
6
5
4
2
3
VOUT GND SET
SOT-23-6
SET 1
VIN 2
VOUT 3
6 _EN/EN
5 NC
7 4 FLG
WDFN-6L 2x2
DS9722-00 August 2011
www.richtek.com
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