TJ2100 - HTC Korea

Adjustable Current Limited Power Distribution Switch
TJ2100
FEATURES
 105mΩ High-Side MOSFET
 2.7V to 5.5V Operating Range
 Adjustable Current Limit : 200mA to 3.0A(Typ.)
 ±10% Current-Limit Accuracy at 1.5A(Typ.)









Fold-back Short Circuit Protection
90uA Typical On-State Supply Current
1uA Maximum Standby Supply Current
Independent Open-drain Fault Flag Pin
Thermal Shutdown Protection
Under Voltage Lockout(UVLO)
TJ2100H : Active High version
TJ2100L : Active Low version
TJ2100A : Fixed Enable version
SOT23-6L PKG
APPLICATION






USB Peripherals
General Purpose Power Switching
ACPI Power Distribution
Notebook PCs
PDAs
Hot Plug-in Power Supplies
DFN2X2-6L PKG
DESCRIPSION
The TJ2100X is single-channel High-Side
MOSFET switch optimized for adjustable current
limited power distribution requiring circuit
protection.
The TJ2100X series support the following USB
requirements. The TJ2100 series supply up to
2.5A as required by USB downstream devices.
Maximum continuous current can be different on
the types of package and ambient temperature.
Switch’s low on-resistance meets USB voltage
drop requirement. 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 TJ2100 include thermal shutdown to prevent
switch failure from high-current loads.
May. 2014–R1.2
ORDERING INFORMATION
Device
Package
TJ2100HGSF6
TJ2100LGSF6
SOT23-6L
TJ2100AGSF6
TJ2100HGQ
TJ2100LGQ
DFN2X2-6L
TJ2100AGQ
-1-
HTC
Adjustable Current Limited Power Distribution Switch
Absolute Maximum Ratings
TJ2100
(Note 1)
Characteristic
Symbol
Min
Max
Unit
VIN
-0.3
6.0
V
VEN
-0.3
6.0
V
Fault Flag Voltage
VFLG
-
6.0
V
Fault Flag Current
IFLAG
-
25
mA
Output Voltage
VOUT
6.0
V
Output Current
IOUT
Internally Limited
Storage Temperature Range
TSTG
Supply Voltage
Enable Input Voltage
Operating Ratings
(Note 2)
-65
℃
150
(Note 3),(Note 4)
Characteristic
Symbol
Min
Max
Unit
Supply Voltage
VIN
2.7
5.5
V
Ambient Temperature Range
TA
-40
+80
℃
Operating Junction Temperature Range
TJ
-40
125
℃
Thermal Resistance
Junction-to-Ambient
SOP23-6L (Note 5)
θJA
250
o
C/W
DFN2x2-6L(Note 6)
θJA
165
o
C/W
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.
2
5. Test Condition for SOT23-6L : Copper Area = 35mm , Board Size = 430 mm X 430mm, 1.6T
2
6. Test Condition for DFN2x2-6L : Copper Area = 35mm , Board Size = 430 mm X 430mm, 1.6T
May. 2014–R1.2
-1-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
Ordering Information
Package
Oder No.
Description
Marking
Compliance
Status
SOT23-6L
TJ2100LGSF6
Adjustable , Active Low
2100LG
RoHS, Green
Contact Us
DFN2X2-6L
TJ2100LGQ
Adjustable , Active Low
2100LG
RoHS, Green
Contact Us
SOT23-6L
TJ2100HGSF6
Adjustable , Active High
2100HG
RoHS, Green
Contact Us
DFN2X2-6L
TJ2100HGQ
Adjustable , Active High
2100HG
RoHS, Green
Contact Us
SOT23-6L
TJ2100AGSF6
Adjustable, Fixed Enable
2100AG
RoHS, Green
Contact Us
DFN2X2-6L
TJ2100AGQ
Adjustable, Fixed Enable
2100AG
RoHS, Green
Contact Us
TJ
2100
Package Type
SF6
Q
Green Mode
G
: Halogen Free
Blank : Pb Free
Enable Mode
Root Name
H
L
A
: SOT23-6L
: DFN2X2-6L
: Active – High
: Active – Low
: Fixed Enable
Product Code
May. 2014–R1.2
-2-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
TYPICAL APPLICATION CIRCUIT
VCONT
VCC
2.7V to 5V
TJ2100L/H
USB
Ports
IN
10uF
10K
OUT
VBUS
33uF
FLG
EN
USB
Control
GND
ILIM
GND
RILIM
20kΩ
1uF
VCONT
VCC
2.7V to 5V
TJ2100A
USB
Ports
IN
10K
10uF
OUT
VBUS
33uF
USB
Control
D+
D-
FLG
D+
DGND
1uF
ILIM
GND
RILIM
20kΩ
FUNCTION BLOCK DIAGRAM
OUT
EN / NC
Current
Limit
Flag
Logic
Gate
Control
FLG
Thermal
Shutdown
UVLO
BIAS
IN
ILIM
GND
May. 2014–R1.2
-3-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
PIN CONFIGURATION
OUT 1
6 IN
ILIM 2
5 GND
FLG 3
4 EN/NC
6 OUT
IN 1
GND 2
PAD
EN/NC 3
5 ILIM
4 FLG
DFN2X2-6L
SOT-23-6L
PIN DESCRIPTION
Pin No.
Pin Name
Pin Description & Function
SOT23-6L
DFN2X2-6L
OUT
1
6
Switch Output: Output MOSFET source. Typically connect to
switched side of load.
ILIM
2
5
Current Limit Set. External resistor used to set current limit
threshold.
FLG
3
4
Fault Flag: Active-low, open-drain output. Indicates Short
circuit current, UVLO and Thermal shutdown.
Enable: Logic-Compatible enable input. (H: active high, L:
EN / NC
4
3
active low). Do not float.
NC: No internal connection at fixed enable type. (Note 7)
GND
5
2
Ground
IN
6
1
Supply Input: Output MOSFET drain. Also supplies IC’s
internal circuitry. Connect to positive supply.
Note:
7. The NC pin in TJ2100A is recommended to tie at Ground.
May. 2014–R1.2
-4-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
ELECTRICAL CHARACTERISTICS (Under the conditions of VIN=+5V and TA=25℃)
PARAMETER
Operating Voltage Range
Symbol
CONDITIONS
VIN
MIN
2.7
1
Enable on, OUT=Open
80
150
uA
2.0
V
1
uA
ICC
Enable Input Threshold
Voltage
VEN
(Note 9)
0.8
Enable Input Current
IEN
VEN = 0V to 5.5V
-1
Enable Input Capacitance
CEN
Output Turn-On Rise Time
Output Turn-Off Delay
Output Turn-On Fall Time
Output leakage Current
Current Limit Threshold
(Note 11)
Short Circuit Current Limit
105
125
mΩ
150
mΩ
70
us
TR
RL=5Ω each output, CL=1uF
60
us
TDOFF
RL=5Ω each output, CL=1uF
5
us
TF
RL=5Ω each output, CL=1uF
10
us
ILEAK
ILIM
ISC
Error Flag Off Current
IFOH
UVLO
Current Limit Response Time
VIN=5V, IOUT=1.0A
125
RFO
Response
pF
RL=5Ω each output, CL=1uF
Error Flag Output Resistance
Flag
1
VIN=3.3V, IOUT=1.0A
TTS
Overcurrent
Delay
0.01
TDON
Over-Temperature
Shutdown Threshold
UVLO Threshold
5.5
V
A
A
uA
Supply Current
Output Turn-On Delay
UNITS
2.3
2.9
0.05
IOUT
RDS(ON)
MAX
SF6 package
Q package
Enable off ,OUT=Open
Recommended Maximum
Continuous Current (Note 8)
Switch Resistance
TYP
TDFOV
TLIM
VENX≤0.8V
0.01
RILIM = 12kΩ
2070
RILIM = 20kΩ
1223
RILIM = 49.9kΩ
484
5
uA
mA
RILIM = 121kΩ
196
RILIM = 12kΩ , VOUT=0V
1446
RILIM = 20kΩ, VOUT=0V
859
RILIM = 49.9kΩ, VOUT=0V
338
RILIM = 121kΩ, VOUT=0V
137
Temperature increasing switch
150
o
C
Temperature decreasing switch
130
o
C
VIN=5V, IL=10mA
10
VIN=3.3V, IL=10mA
mA
Ω
Ω
15
VFLAG=5V
0.01
10
uA
VIN = increasing
2.00
2.15
2.4
V
VIN = decreasing
VIN=5V,
apply VOUT=0V until FLG low
1.85
2.00
2.25
V
(Note 10)
7
ms
1
us
Note:
8. Maximum ambient temperature is a function of device junction temperature and system level considerations, such as
load current, power dissipation and board layout.
9. OFF is VEN≤0.8V and ON is VEN≥2.0V for the TJ2100H. OFF is VEN≥2.0V and ON is VEN≤0.8V for the TJ2100L.
10. TLIM is the response time to operate current limit when the peak value of the current is increased more than set limit
value.
11. It is recommended that current limit level set to 1.5 times more than constant current for a stable power
supply.
May. 2014–R1.2
-5-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
Test Circuit
TJ2100L/H
VCC
IN
R1
10K
OUT
C1
0.1u to 10uF
VOUT
R2
FLG
EN
CL
ILIM
GND
RILIM
CF (Note 12)
1uF
TJ2100A
VCC
IN
R1
10K
OUT
C1
0.1u to 10uF
VOUT
R2
CL
FLG
CF (Note 12)
1uF
ILIM
GND
RILIM
Note:
12. When the CF should be omitted, it is highly recommended to apply 2.2uF or higher capacitance for C1.
May. 2014–R1.2
-6-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
TYPICAL PERFORMANCE CHARACTERISTICS
ON-Resistance vs. Temperature
ON-Resistance vs. Supply Voltage
On - Current vs. Temperature
On - Current vs. Supply Voltage
Enable ON Threshold vs. Temperature
Enable ON Threshold vs. supply Voltage
May. 2014–R1.2
-7-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
Enable OFF Threshold vs. Temperature
Enable OFF Threshold vs. supply Voltage
Current Limit Threshold vs. Temperature
Current Limit Threshold vs. Supply Voltage
Short Circuit Current vs. Temperature
Short Circuit Current vs. Supply Voltage
May. 2014–R1.2
-8-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
UVLO vs. Temperature
May. 2014–R1.2
-9-
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
TYPICAL OPERATING CHARACTERISTICS
-
o
VIN=5V, VEN=5V, TA=25 C, RLIM=15kΩ, CIN=10uF unless otherwise noted
Turn – ON (TJ2100H)
Turn – OFF (TJ2100H)
Stepped Short(TJ2100H)
Inrush Current Response(TJ2100H)
Stepped Short(TJ2100H)
May. 2014–R1.2
Enable into Short(TJ2100H)
- 10 -
HTC
Adjustable Current Limited Power Distribution Switch
UVLO(TJ2100H)
May. 2014–R1.2
TJ2100
Thermal Shutdown(TJ2100H)
- 11 -
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
Function Description
Supply Filtering
A 0.1uF to 10uF bypass capacitor from IN pin to GND pin is recommended to control power supply
transients. Recommend X5R or X7R dielectrics when using ceramic capacitors for input/output. 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 not exceed the absolute maximum supply voltage (VIN(MAX) = 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 P D 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. And if it is
the pin of the fixed enable type must be fixed by connecting to GND. 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 short to GND and thermal shutdown. Also a 1uF
capacitor is recommended to be placed directly next to the FLG pin. It is to prevent the glitches.
Soft-Start Condition
The TJ2100 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 TJ2100 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. When
operating region of power MOSFET is close to saturation region, ON resistance of power MOSFET is
made significantly increase. It can cause the operation of thermal protection before reaching to current
limit level.
May. 2014–R1.2
- 12 -
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
Over-Current and Short-Circuit Protection
The TJ2100 features an over-current protection circuitry to protect the device against overload conditions.
The current limit threshold is user programmable via an external resistor. The TJ2100 provides an
adjustable current limit threshold between 200mA and 3.0A(Typ.). The recommended 1% resistor range
for RILIM is 8.9kΩ to 121kΩ. It protects the output MOSFET switch from damage due to undesirable short
circuit conditions of excess inrush current often encountered during hot plug-in. Also the TJ2100 is
including a fold back current limiting function for short-circuit protection. In the event of an output shortcircuit condition, the current flowing through the switch is about 25~40% smaller than the current limit
threshold(ILIM). A short circuit current limit condition will signal the error flag. These features can protect
the load system effectively at any accidental circumstances.
The following equations can be used to calculate the resulting current limit threshold and short circuit
current for determining external resistor value (RILIM). However, in the equation do not considered
tolerance factors like that processing variation from part to part, as well as variations in the voltage at IN
and OUT, plus the operating temperature. Therefore current limit may be operated more than the
calculated value.
When input voltage oscillates by external factors, input current also oscillates. It can cause the
malfunction to current limit operation. In case of the peak value of current is increased more than set limit
value, the current limit function of TJ2100 operates. Then the RMS value of the current limit may operate
lower than a targeted level.
Equations for current limit:
𝐼
𝐼
=
=
26117.8
.
𝑅
𝑘Ω
𝐼
=
26117.8
𝑅
.
𝑘Ω
𝐼
=
26117.8
𝑅
.
𝑘Ω
18248.3
𝑅
.
𝑘Ω
RLIM Current Limit Resistor
May. 2014–R1.2
- 13 -
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
Table 1. Recommended RILIM Resistor Selections
Desired
Nominal
Current
Limit(mA)
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
Actual Limits(mA)
Calculated
RILIM(kΩ)
Calculated
ISC(mA)
118.69
79.76
60.16
48.34
40.43
34.76
30.49
27.17
24.50
22.31
20.49
18.94
17.62
16.46
15.45
14.56
13.77
13.06
12.42
11.84
11.31
10.83
10.38
9.98
139.7
209.6
279.5
349.3
419.2
489.1
559.0
628.8
698.7
768.6
838.4
908.3
978.2
1048.0
1117.9
1187.8
1257.6
1327.5
1397.4
1467.2
1537.1
1607.0
1676.9
1746.7
RILIM(kΩ)
ILIM(MIN)
ILIM(NOM)
ILIM(MAX)
ISC(nom)
124.50
82.60
62.20
49.90
41.40
35.46
31.09
27.59
24.91
22.86
20.68
19.21
17.72
16.53
15.50
14.58
13.82
13.10
12.42
11.80
11.24
10.84
10.37
9.98
157.1
242.6
327.7
414.0
504.6
594.6
683.5
775.8
864.5
946.9
1053.1
1138.7
1240.4
1335.3
1429.5
1525.3
1614.4
1708.6
1807.9
1908.7
2009.7
2088.4
2188.8
2279.6
181
279
380
481
585
687
789
894
989
1091
1197
1296
1402
1502
1608
1698
1782
1898
2006
2086
2202
2272
2380
2478
220.2
330.5
437.6
544.3
654.8
763.3
869.4
978.6
1082.7
1178.8
1301.8
1400.4
1516.9
1625.0
1731.8
1840.0
1940.1
2045.7
2156.5
2268.7
2380.6
2467.5
2578.2
2677.9
131.00
204.50
272.50
344.00
419.50
482.50
556.00
633.00
703.00
768.00
838.00
924.00
994.00
1060.00
1118.00
1190.00
1256.00
1322.00
1386.00
1456.00
1528.00
1576.00
1642.00
1698.00
Thermal Shutdown Protection
Thermal shutdown limits the TJ2100 junction temperature and protects the device from damage as a
result of overheated.
Thermal protection turns off when the TJ2100’s junction temperature 150℃ reached, allowing it to cool
down until 130℃. The TJ2100 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 V IN exceeds
approximately 2.25V. After the switch turns on, if the voltage drops below 2.05V 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.
May. 2014–R1.2
- 14 -
HTC
Adjustable Current Limited Power Distribution Switch
TJ2100
PACKAGE OUTLINE SPECIFICATION
SOT23-6L
May. 2014–R1.2
- 15 -
HTC