Power Switch. RT9722 Datasheet

RT9722 Switch. Datasheet pdf. Equivalent

RT9722 Datasheet
Recommendation RT9722 Datasheet
Part RT9722
Description 1.5A Power Switch
Feature RT9722; RT9722 145mΩ, 1.5A Power Switch with Programmable Current Limit General Description The RT9722 is .
Manufacture Richtek
Datasheet
Download RT9722 Datasheet




Richtek RT9722
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
54
23
VOUT GND SET
SOT-23-5
VIN FLG EN/EN
654
23
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
1



Richtek RT9722
RT9722
Marking Information
RT9722AGB
1H=DNN
1H= : Product Code
DNN : Date Code
RT9722AGE
DQ=DNN
DQ= : Product Code
DNN : Date Code
RT9722AGQW
H0W
H0 : Product Code
W : Date Code
RT9722BGB
1S=DNN
1S= : Product Code
DNN : Date Code
RT9722BGE
DT=DNN
DT= : Product Code
DNN : Date Code
RT9722BGQW
H1W
H1 : Product Code
W : Date Code
Typical Application Circuit
Supply
Voltage
5 VIN
SET 3
CIN
1µF
RT9722
RSET
Enable
4 EN/EN VOUT 1
GND
2
0.47µF Peripheral
Supply
Voltage
Enable
Pull-Up Resistor (10k to 100k)
VIN FLG
C1µINF
RT9722
SET
EN/EN VOUT
GND
Fault Flag
RSET
0.47µF Peripheral
Figure 1. Typical Application Circuit for SOT-23-5
Package
Figure 2. Typical Application Circuit for SOT-23-6 and
WDFN-6L 2x2 Package
www.richtek.com
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DS9722-00 August 2011



Richtek RT9722
RT9722
Functional Pin Description
Pin No.
SOT-23-5 SOT-23-6 WDFN-6L 2x2 Pin Name
Pin Function
11
3
VOUT
Switch Output Voltage.
2
2 7 (Exposed Pad) GND
Ground. The exposed pad must be soldered to a large PCB
and connected to GND for maximum power dissipation.
33
1
SET
Current Limit Set Input. A resistor from SET to GND sets
the current limit of the switch.
44
6
EN/EN
Chip Enable (Active High for RT9722A / Active Low for
RT9722B).
-- 5
4 FLG Fault Flag Open-Drain Output.
56
2 VIN Power Input Voltage.
-- --
5 NC No Internal Connection.
Function Block Diagram
SET
EN/EN
UVLO
Bias
Thermal
Protection
Current
Limiting
Gate
Control
Output
Voltage
Detection
Flag
Control
VIN
VOUT
FLG
GND
DS9722-00 August 2011
www.richtek.com
3







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