Document
Techcode®
USB Power-Distribution Switches
DATASHEET
TD9516/TD9517/TD9518/TD9519
General Description
Features
The TD9516/TD9517/TD9518/TD9519 series of power switches are designed for USB applications. The 62mN-channel MOSFET power 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. When VOUT drops below 1.5V, the devices limit the current to a lower and safe level. The over-temperature protection limits the junction temperature below 140oC in case of short circuit or over load conditions.Other features include a deglitched OCB output to indicate the fault condition and an enable input to enable or disable the device.
62mΩ High Side MOSFET Wide Supply Voltage Range: 2.7V to 5.5V Current-Limit and Short-Circuit Protections Over-Temperature Protection Fault Indication Output 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) TD9516A/TD9517A
SOT-23-5(Top View) TD9518A/TD9519A
SOT-23-5(Top View) TD9516B/TD9517B
SOT-23-5(Top View) TD9518B/TD9519B
Figure Pin Configuration of TD9516/TD9517/TD9518/TD9519(Top View)
October, 20, 2011.
Techcode Semiconductor Limited 1
www.techcodesemi.com
Techcode®
USB Power-Distribution Switches
Pin Description
DATASHEET
TD9516/TD9517/TD9518/TD9519
Pin Number
TD9516/ TD9517
TD9518/ TD9519
15 22 31
43 54
Pin Name
Description
VOUT GND OCB
EN
ENB VIN
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. Fault Indication Pin. This pin goes low when a current limit or an over-temperature condition is detected after a 12ms deglitch time. 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. 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.
Ordering Information
Circuit Type A/B: A- Enable High B- Enable Low
T:SOT-23
TD951X □ □ □
Packing: Blank:Tube R:Type and Reel
October, 20, 2011.
Techcode Semiconductor Limited 2
www.techcodesemi.com
Techcode®
USB Power-Distribution Switches
Functional Block Diagram
DATASHEET
TD9516/TD9517/TD9518/TD9519
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
VIN VIN Input Voltage (VIN to GND)
-0.3 ~ 7
V
VOUT
VOUT to GND Voltage
-0.3 ~ 7
V
VENB, VEN EN, ENB to GND Voltage
-0.3 ~ 7
V
VOCB
OCB to GND Voltage
-0.3 ~ 7
V
TJ Maximum Junction Temperature
150 oC
TSTG Storage Temperature
-65 ~ 150
oC
TSDR Maximum Soldering Temperature, 10 Seconds
260 oC
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.
October, 20, 2011.
Techcode Semiconductor Limited 3
www.techcodesemi.com
Techcode®
USB Power-Distribution Switches
Recommended Operating Conditions
DATASHEET
TD9516/TD9517/TD9518/TD9519
Symbol Parameter
VIN VIN Input Voltage
VCC VCC Supply Voltage
OUT Output Current (TD9516/TD9518) IOUT
OUT Output Current (TD9517/TD9519)
TA Ambient Temperature TJ Junction Temperature
Note: Refer to the typical application circuit.
Range 2.7~5.5 4.5 ~ 5.5 0~1 0~ 2.4 -40 ~ 85 -40 ~ 125
Unit V V A A oC oC
Thermal Characteristics
Symbol
JA
Parameter Junction-to-Ambient Resistance in Free Air
Typical Value
235
Unit °C/W
October, 20, 2011.
Techcode Semiconductor Limited 4
www.techcodesemi.com
Techcode®
USB Power-Distribution Switches
DATASHEET
TD9516/TD9517/TD9518/TD9519
Electrical Characteristics
Unless otherwise specified, these specifications apply over VIN=5V, VEN =5V or VENB=0V and TA= -40 ~ 85 oC. Typical values are at TA=25oC.
Symbol
Parameter
Test Conditions
SUPPLY CURRENT
VIN Supply Current
No load, VEN=0V or VENB=5V No load, VEN=5V or VENB=0V
Leakage Current
VOUT=GND, VEN=0V or VENB=5V
Reverse Leakage Current
VIN=GND, VOUT=5V, VEN=0V or VENB=5V
POWER SWITCH
RDS(ON)
Power Switch On Resistance
IOUT=1A, TA= 25 oC
UNDER-VOLTAGE LOCKOUT (UVLO)
VIN UVLO Threshold Voltage
VIN rising, TA= -40 ~ 85 oC
VIN UVLO Hysteresis
CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTIONS
ILIM ISHORT
Current Limit Threshold Short-Circuit Output Current
TD9517/TD9519 VIN=2.7V to 5.5V, TA= -40 ~ 85 oC
TD9516/TD9518 VIN=2.7V to 5.5V, TA= -40 ~ 85 oC TD9517/TD9519, VIN=2.7V to 5.5V TD9516/TD9518, VIN=2.7V to 5.5V
OCB OUTPUT PIN
OCB Output Low Voltage
IOCB=5mA
OCB Leakage Current
VOCB=5V
tD(OCB)
OCB Deglitch Time
OCB assertion, TA= -40 ~ 85 oC
EN OR ENB INPUT PIN.