In the field of high-end analog circuit design and production, American Ted Semiconductor Co., Ltd. has 12 years of comprehensive design experience. We not only have the world's leading analog circuit design technology, but also have a more complete and advanced product quality management method. Due to the production method of "no production line design company", we use a more efficient wafer foundry cooperation model in business operations, so that we can quickly use advanced and more time-effective technology to design high-end analog circuit products with higher cost performance, and then quickly meet customers' needs for high-end products in the growing market demand.
switch satisfies the voltage drop requirements of USB
specification.
The protection features include current‐limit protection,
short‐circuit protection, and over‐temperature protection.
The device limits the output current at current limit
threshold level. The over‐temperature
protection limits
the junction temperature below
140℃ in case of short
circuit or over load conditions. An enable input to enable
or disable the device.
32mΩ
High Side MOSFET
Voltage Range: 3.5V to 5.5V
Current‐Limit and Short‐Circuit Protections
Over‐Temperature Protection
Iset Input
Enable Input
Lead Free and Green Devices Available
Applications
Notebook and Desktop Computers
USB Ports
High‐Side Power Protection Switches
Pin Configurations
SOT‐23‐5(Top View)
Pin Configuration of TD9521
Pin Function Description
Pin Number
1
2
3
4
5
Pin Name
VOUT
GND
ISET
EN
VIN
Description
Output Voltage Pin. The output voltage follows the input voltage. When ENB is
high or EN is low, the output voltage is discharged by an internal resistor.
Ground.
i set pin. ILim=120k*1.14V/Riset
Enable Input. Pulling this pin to high will enable the device and pulling this pin
to low will disable device. The EN pin cannot be left floating.
Power Supply Input. Connect this pin to external DC supply.
June 6, 2017
Techcode Semiconductor Limited
www.techcodesemi.com
1
T
echcode
®
USB Power-Distribution Switches
DATASHEET
TD9521
Functional Block Diagram
Absolute Maximum Ratings
Symbol
V
IN
V
OUT
V
EN
V
ISET
T
J
T
STG
T
SDR
Parameter
VIN Input Voltage (VIN to GND)
VOUT to GND Voltage
EN to GND Voltage
ISET to GND Voltage
Maximum Junction Temperature
Storage Temperature Range
Maximum Soldering Temperature Range, 10 seconds
Rating
‐0.3 to 7
‐0.3 to 7
‐0.3 to 7
‐0.3 to 7
150
‐65 to +150
260
Unit
V
V
V
V
o
o
o
C
C
C
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute maximum rating conditions for extended periods
may affect device reliability.
June 6, 2017
Techcode Semiconductor Limited
www.techcodesemi.com
2
T
echcode
®
USB Power-Distribution Switches
Parameter
VIN Input Voltage (VIN to GND)
Output current
Ambient Temperature
Junction Temperature
Junction‐to‐Ambient Resistance in Free Air
Rating
3.5 to 5.5
0 to 3
‐40 to 85
‐40 to +125
235
DATASHEET
TD9521
Recommended Operating Conditions
Symbol
V
IN
I
OUT
T
A
T
J
θ
JA
Unit
V
A
o
o
o
C
C
C/W
Note: Refer to the typical application circuit.
Typical Application Circuit
June 6, 2017
Techcode Semiconductor Limited
www.techcodesemi.com
3
T
echcode
®
USB Power-Distribution Switches
Parameter
Test Conditions
No load, V
EN
=0V
No load, V
EN
=5V
V
OUT
=GND, V
EN
=0V
V
IN
=GND, V
OUT
=5V, V
EN
=0V
I
OUT
=1A, T
A
= 25℃
Min.
‐
‐
‐
‐
‐
‐
‐
1.1
2.4
80%
DATASHEET
TD9521
Electrical Characteristics
Unless otherwise specified, these specifications apply over V
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