TJ2110LGSF5 [HTC]
Single-Channel Power Distribution Switch; 单通道配电开关
| 型号： | TJ2110LGSF5 |
| 厂家： | 
HTC KOREA TAEJIN TECHNOLOGY CO. |
| 描述： | Single-Channel Power Distribution Switch |
| 文件： | 总14页 (文件大小：981K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Single-Channel Power Distribution Switch
TJ2110
prevent switch failure from high-current loads.
FEATURES
3.0V to 5.5V Operating Range
1.0A Continuous Current
2.2A Accurate Current limiting
1.6A Short Circuit Current
80uA Typical On-State Supply Current
1uA Maximum Standby Supply Current
Independent open-drain fault flag pins
Thermal Shutdown Protection
Under Voltage Lockout(UVLO)
TJ2110H : Active High version
TJ2110L : Active Low version
UL Recognized. UL File No. E347996
SOT23-5L PKG
SOP8 PKG
APPLICATION
USB Peripherals
General Purpose Power Switching
ACPI Power Distribution
Notebook PCs
PDAs
MSOP8 PKG
Hot Plug-in Power Supplies
DESCRIPSION
The TJ2110X is single-channel High-Side
MOSFET switch optimized for general-purpose
power distribution requiring circuit protection.
The TJ2110 series support the following USB
requirements. The TJ2110 series supply up to
1.0A as required by USB downstream devices.
Switch’s low on-resistance meets USB voltage
drop requirement. Fault current is limited to
typically 2.2A. Flag output indicate fault
condition to the local USB controller. Soft-start
prevents the transient voltage drop on the
upstream port that can occur when the switch is
enabled in bus-powered applications. Under
voltage lockout (UVLO) feature disables the
output switches until a valid input voltage. Also
the TJ2110 include thermal shutdown to
ORDERING INFORMATION
Device
Package
TJ2110HGSF5
TJ2110LGSF5
TJ2110HGD
SOT23-5L
SOP8
TJ2110LGD
TJ2110HGMD
TJ2110LGMD
MSOP8
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
Absolute Maximum Ratings
Characteristic
(Note 1)
Symbol
VIN
Min
-0.3
-0.3
-
Max
6.0
6.0
6.0
25
Unit
V
Supply Voltage
Enable Input Voltage
Fault Flag Voltage
Fault Flag Current
Output Voltage
(Note 2)
VEN
V
VFLG
IFLAG
VOUT
V
-
mA
V
6.0
Internally
Limited
Output Current
IOUT
Storage Temperature Range
TSTG
-65
150
oC
Operating Ratings
(Note 3)(Note 4)
Characteristic
Symbol
Min
3.0
Max
5.5
Unit
V
Supply Voltage
VIN
TA
TJ
Ambient Temperature Range
Operating Junction Temperature Range
SOP8 (Note 5)
-40
-40
+85
125
oC
oC
125
166
250
33
Thermal Resistance
Junction-to-Ambient
MSOP8(Note 6)
SOT-23-5L (Note 7)
SOP8 (Note 5)
θJA
oC/W
Thermal Resistance
Junction-to-Case
MSOP8(Note 6)
SOT-23-5L (Note 7)
θJC
44
oC/W
130
Note:
1. Exceeding the absolute maximum ratings may damage the device.
2. It is recommended for VEN voltage not to exceed VIN voltage.
3. The device is not guaranteed to function outside its operating rating.
4. Devices are ESD sensitive. Handling precautions are recommended.
5. Test Condition for SOP8 : Copper Area = 150mm2 , Board Size = 500 mm X 650mm, 1.6T
6. Test Condition for MSOP8 : Copper Area = 150mm2 , Board Size = 500 mm X 650mm, 1.6T
7. Test Condition for SOT-23-5L : Copper Area = 35mm2 , Board Size = 430 mm X 430mm, 1.6T
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
Ordering Information
Package
SOT23-5L
SOP8
Oder No.
TJ2110LGSF5
TJ2110LGD
Description
1A, Active Low
1A, Active Low
1A, Active Low
1A, Active High
1A, Active High
1A, Active High
Marking
2110LG
Compliance
RoHS, Green
RoHS, Green
RoHS, Green
RoHS, Green
RoHS, Green
RoHS, Green
Status
Contact Us
Contact Us
Contact Us
Contact Us
Contact Us
Contact Us
TJ2110LG
TJ2110LG
2110HG
MSOP8
SOT23-5L
SOP8
TJ2110LGMD
TJ2110HGSF5
TJ2110HGD
TJ2110HGMD
TJ2110HG
TJ2110HG
MSOP8
TJ 2110
SF5
D
MD
: SOT23-5L
: SOP8
:MSOP8
Package Type
G
: Halogen Free
Green Mode
Enable Mode
Blank : Pb Free
: Active – High
: Active – Low
H
L
Root Name
Product Code
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
TYPICAL APPLICATION CIRCUIT
VCC
VCONT
3.0V to 5V
TJ2110
USB
Ports
IN
0.1uF
OUT
VBUS
0.1uF
33uF
10K
D+
D-
FLG
EN
GND
USB
Control
GND
FUNCTION BLOCK DIAGRAM
OUT
Current
Limit
EN
Flag
Logic
Gate
Control
FLG
Thermal
Shutdown
UVLO
BIAS
IN
GND
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
PIN CONFIGURATION
OUT 1
5
4
IN
2
3
GND
FLG
EN
SOT-23-5L
1
2
8
7
GND
IN
NC
1
2
3
4
8
GND
IN
NC
OUT
OUT
FLG
7
6
5
OUT
OUT
FLG
3
4
6
5
IN
IN
EN
EN
MSOP-8
SOP-8
PIN DESCRIPTION
Pin No.
Pin Name
Pin Description & Function
SOP-8/MSOP-8
SOT23-5L
GND
IN
1
2 , 3
4
2
5
Ground
Supply Input: Output MOSFET drain. Also supplies IC’s
internal circuitry. Connect to positive supply.
Enable: Logic-Compatible enable input. (H: active high,
L: active low). Do not float.
EN
4
Fault Flag: Active-low, open-drain output. Indicates
over current, UVLO and Thermal shutdown.
FLG
OUT
NC
5
3
Switch Output: Output MOSFET source. Typically
connect to switched side of load.
6,7
8
1
N/A
No internal connection; recommend tie to OUT pins
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
ELECTRICAL CHARACTERISTICS (Under the conditions of VIN=+5V and TA=25℃)
PARAMETER
Symbol
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Voltage Range
VIN
3.0
5.5
1
V
Enable off ,OUT=Open
0.05
80
uA
uA
V
Supply Current
ICC
Enable on, OUT=Open
(Note 8)
150
2.0
1
Enable Input Threshold
Voltage
VEN
IEN
0.8
-1
Enable Input Current
VEN = 0V to 5.5V
0.01
1
uA
pF
mΩ
mΩ
us
us
us
us
uA
A
Enable Input Capacitance
CEN
VIN=5V, IOUT=1.0A
120
140
70
140
160
Switch Resistance
RDS(ON)
VIN=3.3V, IOUT=1.0A
Output Turn-On Delay
Output Turn-On Rise Time
Output Turn-Off Delay
Output Turn-On Fall Time
Output leakage Current
Current Limit Threshold
Short Circuit Current Limit
TDON
TR
TDOFF
TF
ILEAK
ILIM
RL=5Ω each output, CL=1uF
RL=5Ω each output, CL=1uF
RL=5Ω each output, CL=1uF
RL=5Ω each output, CL=1uF
VENX≤0.8V
60
5
10
0.01
2.2
1.6
145
135
10
5
Ramped load applied to output
each output, VOUT=0V
Temperature increasing switch
Temperature decreasing switch
VIN=5V, IL=10mA
1.7
1.2
2.7
2.0
IOS
A
oC
oC
Ω
Over-Temperature
Shutdown Threshold
TTS
25
40
Error Flag Output Resistance
Error Flag Off Current
UVLO Threshold
RFO
VIN=3.3V, IL=10mA
15
Ω
IFOH
VFLAG=5V
0.01
2.25
2.05
10
10
uA
V
VIN = increasing
2.1
1.9
4
2.6
2.45
15
UVLO
TDFOV
VIN = decreasing
V
Overcurrent Flag Response
Delay
VIN=5V, apply VOUT=0V until FLG low
ms
Note:
8. OFF is VEN≤0.8V and ON is VEN≥2.0V for the TJ2110H. OFF is VEN≥2.0V and ON is VEN≤0.8V for the TJ2110L.
Jun. 2012 – R1.3 - 6 -
HTC
Single-Channel Power Distribution Switch
TJ2110
Test Circuit
VCC
3.0V to 5V
TJ2110
IN
OUT
VOUT
C1
0.1u to 1uF
R1
10K
R2
CL
FLG
EN
GND
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
TYPICAL PERFORMANCE CHARACTERISTICS
ON-Resistance vs. Temperature
ON-Resistance vs. Supply Voltage
On-Current vs. Temperature
On-Current vs. Supply Voltage
Enable Threshold vs. Temperature
(TJ2110L)
Enable Threshold vs. supply Voltage
(TJ2110L)
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Disable Threshold vs. Temperature
(TJ2110L)
Disable Threshold vs. supply Voltage
(TJ2110L)
Turn-On Delay Time vs. Temperature
Turn-Off Delay Time vs. Supply voltage
Rising Time vs. Temperature
Falling Time vs. Supply Voltage
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Current Limit Threshold vs. Temperature
Current Limit Threshold vs. Supply Voltage
Short Circuit Current vs. Supply Voltage
UVLO vs. Temperature
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
TYPICAL OPERATING CHARACTERISTICS
-
VIN=5V, VEN=0V, TA=25oC, unless otherwise noted
Turn – ON / Turn-OFF(TJ2110L)
Turn – ON(TJ2110L)
Turn – OFF(TJ2110L)
Inrush Current Response(TJ2110L)
Enable Into Short(TJ2110L)
Stepped Short(TJ2110L)
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
TYPICAL OPERATING CHARACTERISTICS (continued)
Thermal Shutdown
UVLO – VIN Rising & Falling
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
Function Description
Supply Filtering
A 0.1uF to 1uF bypass capacitor from IN pin to GND pin is recommended to control power supply
transients. Without this bypass capacitor, an output short can cause ringing from supply lead inductance
on the input and damage the internal control circuitry.
Input or output transients must never exceed the absolute maximum supply voltage (VINmax = 6V)
Power Dissipation
The device’s junction temperature depends on several factors such as the load, PCB layout, ambient
temperature, and package type. Equations that can be used to calculate power dissipation of each
channel and junction temperature are found below:
2
PD=RDS(ON)
x
IOUT
Total power dissipation of the device will be the summation of PD for both channels. To relate this to
junction temperature, the following equation can be used:
TJ=PD x θJA +TA
Where:
TJ = Junction temperature
TA = Ambient temperature
θJA= Thermal resistance of the package
Enable/Shutdown
The EN control pin must be driven to a logic high or logic low for a clearly defined signal input. Floating
these control lines may cause unpredictable operation.
Fault Flag
The FLG signal is open-drained output of N-channel MOSFET, the FLG output is pulled low to signal the
following fault conditions: input under voltage, output current limit, and thermal shutdown.
Soft-Start Condition
The TJ2110 has high impedance when off, which gradually shifts to low impedance as the chip turns on.
This prevents an inrush current from causing voltage drops that result from charging a capacitive load and
can pull the USB voltage bus below specified levels. This satisfies the USB voltage droop requirements
for bus-powered applications.
The TJ2110 can provide inrush current limiting for applications with large load capacitances where CL
>10uF.
Current Sense
A sense MOSFET monitors the current supplied to the load. The sense MOSFET measures current more
efficiently than conventional resistance methods. When an overload or short circuit is encountered, the
current-sense circuitry sends a control signal to the driver. The driver in turn reduces the gate-source
voltage and drives the power MOSFET into its saturation region, which switches the output into a
constant-current mode and holds the current constant while varying the voltage on the load.
Over-Current and Short-Circuit Protection
The TJ2110 features an over-current protection circuitry to protect the device against overload conditions.
The current limit threshold is preset internally. It protects the output MOSFET switches from damage due
to undesirable short circuit conditions of excess inrush current often encountered during hot plug-in. The
low limit of the current limit threshold of the TJ2110 allows a minimum current of 1.0A through the
Jun. 2012 – R1.3
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HTC
Single-Channel Power Distribution Switch
TJ2110
MOSFET switches. A current limit condition will signal the error flag. These features can protect the load
system effectively at any accidental circumstances.
Thermal Shutdown Protection
Thermal shutdown limits the TJ2110 junction temperature and protects the device from damage as a
result of overheated.
Thermal protection turns off when the TJ2110’s junction temperature 145℃ reached, allowing it to cool
down until 135℃. The TJ2110 is reactivated when a junction temperature drops to approximately 130℃.
It depends on the power dissipation, thermal resistance, and ambient temperature.
Under Voltage Lockout
Under Voltage Lockout (UVLO) prevents the output MOSFET from turning on until VIN exceeds
approximately 2.3V. After the switch turns on, if the voltage drops below 2.1V typically, UVLO shuts off
the output MOSFET. Under voltage detection functions only when the switch is enabled.
Printed Circuit Layout
The power circuitry of USB printed circuit boards requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
USB Compliance
The TJ2110 is ideal for self-powered and bus powered Universal Serial Bus (USB) applications. A USB
port provides a +5.0V bus and ground return line in addition to a twisted pair for data.
The TJ2110 will comply with the following USB requirements:
1) The fault current is well below the UL 25VA safety requirements.
2) The Flag Outputs are available to indicate fault conditions to USB controllers.
3) The MOSFET switches' low on-resistance meets USB voltage drop requirements.
4) The MOSFET switch channel can supply 1.0A as required by USB downstream devices.
5) Soft start eliminates any momentary voltage drops on the upstream port that may occur when the
Switches are enabled in bus-powered applications.
6) An Under-voltage Lockout ensures that the device remains off unless there is a valid input supply
voltage present.
7) +3.0V and +5.0V logic compatible enable inputs.
8) Thermal Shutdown prevents the possibility of catastrophic switch failure from high-current loads.
8) The device is available in both active-high and active-low versions.
Jun. 2012 – R1.3
- 14 -
HTC
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