Power Switch. RT9728 Datasheet

RT9728 Switch. Datasheet pdf. Equivalent

RT9728 Datasheet
Recommendation RT9728 Datasheet
Part RT9728
Description 1.3A Power Switch
Feature RT9728; RT9728 120mΩ, 1.3A Power Switch with Programmable Current Limit General Description The RT9728 is .
Manufacture Richtek
Datasheet
Download RT9728 Datasheet




Richtek RT9728
RT9728
120mΩ, 1.3A Power Switch with Programmable Current Limit
General Description
The RT9728 is a cost effective, low voltage, single
P-MOSFET high side power switch IC for USB application
with a programmable current limit feature. Low switch-on
resistance (typ.120mΩ) and low supply current (typ.
120μA) are realized in this IC.The RT9728 can offer a
programmable current limit threshold between 75mA and
1.3A (typ.) via an external resistor. The ±10% current limit
accuracy can be realized for all current limit settings.
Besides, a flag output is available to indicate fault
conditions to the local USB controller. Furthermore, the
chip also integrates an embedded delay function to prevent
mis-operation from happening due to high inrush current.
The RT9728 is an ideal solution for USB power supply
and can support flexible applications since it is functional
for various current limit requirements. It is available in
WDFN-6L 2x2 package.
Features
±10% Current Limit Accuracy @ 1.3A
Adjustable Current Limit : 75mA to 1.3A (typ.)
Meets USB Current Limiting Requirements
Operating Voltage Range : 2.5V to 5.5V
Reverse Input Output Voltage Protection
Built-in Soft-Start
120mΩ High Side MOSFET
120μA Supply Current
RoHS Compliant and Halogen Free
Applications
USB Bus/Self Powered Hubs
USB Peripheral Ports
ACPI Power Distribution
Battery Power Equipment
3G/3.5G Data Card, Set-Top Boxes
Ordering Information
RT9728
Pin 1 Orientation***
(2) : Quadrant 2, Follow EIA-481-D
(For RT9728GQW Only)
Package Type
QW : WDFN-6L 2x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Note :
***Empty means Pin1 orientation is Quadrant 1
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.
Pin Configurations
(TOP VIEW)
VOUT 1
ILIM 2
FAULT 3
6 VIN
5 GND
7 4 EN
WDFN-6L 2x2
Marking Information
RT9728GQW
J0W
J0 : Product Code
W : Date code
RT9728ZQW
J0W
J0 : Product Code
W : Date Code
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9728-05 October 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT9728
RT9728
Typical Application Circuit
VIN
RFAULT
100k
FAULT Signal
Chip Enable
6 VIN
VOUT 1
CIN
10µF
RT9728
3 FAULT
ILIM 2
RILIM
VOUT
150µF
4 EN
GND 5, 7 (Exposed Pad)
Function Block Diagram
Reverse Voltage
+ Comparator
Switch
-
well
VIN
Current
Sense
4ms
Deglitch
EN
Drive
Current
Limit
UVLO
Thermal
Sense
7.5ms
Deglitch
VOUT
FAULT
GND
ILIM
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
VOUT
Power Switch Output.
2
ILIM
External Resistor Used to Set Current Limit Threshold. Recommended 19.1k
RILIM 232k.
3
FAULT
Active-Low Open-Drain Output. Asserted during over current, over temperature,
or reverse voltage conditions.
4 EN
Chip Enable (Active High).
5,
7 (Exposed Pad)
GND
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
6 VIN Supply Input Voltage.
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9728-05 October 2014



Richtek RT9728
RT9728
Absolute Maximum Ratings (Note 1)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 0.3V to 6V
Other Pin Voltage --------------------------------------------------------------------------------------------------------- 0.3V to 6V
Power Dissipation, PD @ TA = 25°C
WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------- 0.606W
Package Thermal Resistance (Note 2)
WDFN-6L 2x2, θJA --------------------------------------------------------------------------------------------------------- 165°C/W
WDFN-6L 2x2, θJC -------------------------------------------------------------------------------------------------------- 7°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range -------------------------------------------------------------------------------------------- 65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 2.5V to 5.5V
Junction Temperature Range -------------------------------------------------------------------------------------------- 40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------------- 40°C to 85°C
Electrical Characteristics
(VIN = 3.6V, 19.1kΩRILIM 232kΩ, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
EN Threshold Logic-High
Voltage
Logic- Low
Current-Limit Threshold
Resistor Range
VIH
VIL
RILIM
Under Voltage Lockout
Threshold
UVLO
VIN Rising
VIN Falling
Min Typ Max
1.1 --
--
-- -- 0.66
19.1 -- 232
-- 2.35 --
-- 2.10 --
Shutdown Current
ISHDN VIN = 5.5V, No Load on VOUT, VEN = 0V -- 1 3
Quiescent Current
Reverse Leakage Current
Thermal Shutdown
Temperature
Static Drain-Source
On-State Resistance
IQ
IREV
TSD
RDS(ON)
Current Limit
ILIM
Reverse Voltage Comparator
Trip Point (VOUT VIN)
VIN = 5.5V, No RILIM = 20k
Load on VOUT RILIM = 210k
VOUT = 5.5V, VIN = 0V
ISW = 0.2A
RILIM = 20k
RILIM = 49.9k
RILIM = 210k
ILIM Shorted to VIN
-- 120 170
-- 120 170
-- 1
3
-- 160 --
-- 120 --
1166
468
110
50
1295
520
130
75
1425
572
150
100
-- 135 --
Unit
V
k
V
A
A
A
°C
m
mA
mV
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9728-05 October 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)