TI TPS2011

TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
D
D
D
D
D
D
D
D
D
D
D PACKAGE
(TOP VIEW)
95-mΩ Max (5.5-V Input) High-Side MOSFET
Switch With Logic Compatible Enable Input
Short-Circuit and Thermal Protection
Typical Short-Circuit Current Limits:
0.4 A, TPS2010; 1.2 A, TPS2011;
2 A, TPS2012; 2.6 A, TPS2013
Electrostatic-Discharge Protection, 12-kV
Output, 6-kV All Other Terminals
Controlled Rise and Fall Times to Limit
Current Surges and Minimize EMI
SOIC-8 Package Pin Compatible With the
Popular Littlefoot Series When GND Is
Connected
2.7-V to 5.5-V Operating Range
10-µA Maximum Standby Current
Surface-Mount SOIC-8 and TSSOP-14
Packages
– 40°C to 125°C Operating Junction
Temperature Range
GND
IN
IN
EN
1
8
2
7
3
6
4
5
OUT
OUT
OUT
OUT
PW PACKAGE
(TOP VIEW)
GND
IN
IN
IN
IN
IN
EN
1
14
2
13
3
12
4
11
5
10
6
9
7
8
OUT
OUT
OUT
OUT
OUT
OUT
OUT
description
The TPS201x family of power-distribution switches is intended for applications where heavy capacitive loads
and short circuits are likely to be encountered. The high-side switch is a 95-mΩ N-channel MOSFET. Gate drive
is provided by an internal driver and charge pump designed to control the power switch rise times and fall times
to minimize current surges during switching. The charge pump operates at 100 kHz, requires no external
components, and allows operation from supplies as low as 2.7 V. When the output load exceeds the current-limit
threshold or a short circuit is present, the TPS201x limits the output current to a safe level by switching into a
constant-current mode. Continuous heavy overloads and short circuits increase power dissipation in the switch
and cause the junction temperature to rise. If the junction temperature reaches approximately 180°C, a thermal
protection circuit shuts the switch off to prevent damage. Recovery from thermal shutdown is automatic once
the device has cooled sufficiently.
The members of the TPS201x family differ only in short-circuit current threshold. The TPS2010 is designed to
limit at 0.4-A load; the other members of the family limit at 1.2 A, 2 A, and 2.6 A (see the available options table).
The TPS201x family is available in 8-pin small-outline integrated circuit (SOIC) and 14-pin thin shink
small-outline (TSSOP) packages and operates over a junction temperature range of – 40°C to 125°C. Versions
in the 8-pin SOIC package are drop-in replacements for Siliconix’s Littlefoot power PMOS switches, except
that GND must be connected.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright  1995, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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1
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
AVAILABLE OPTIONS
TJ
PACKAGED DEVICES
RECOMMENDED MAXIMUM
CONTINUOUS LOAD CURRENT
(A)
TYPICAL SHORT-CIRCUIT
OUTPUT CURRENT LIMIT AT 25°C
(A)
SOIC
(D)†
TSSOP
(PW)‡
CHIP
FORM
(Y)
0.2
0.4
TPS2010D
TPS2010PWLE
TPS2010Y
0.6
1.2
TPS2011D
TPS2011PWLE
TPS2011Y
1
2
TPS2012D
TPS2012PWLE
TPS2012Y
– 40°C to 125°C
1.5
2.6
TPS2013D TPS2013PWLE TPS2013Y
† The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2010DR).
‡ The PW package is only available left-end taped and reeled (indicated by the LE suffix on the device type; e.g., TPS2010PWLE).
functional block diagram
Power Switch
CS
IN
†
OUT
Charge
Pump
Driver
EN
GND
Current
Limit
Thermal
Sense
† Current sense
Terminal Functions
TERMINAL
NAME
NO.
I/O
DESCRIPTION
D
PW
EN
4
7
I
Enable input. Logic low turns power switch on.
GND
1
1
I
Ground
IN
2, 3
2–6
I
Input voltage
OUT
5–8
8 – 14
O
Power-switch output
detailed description
power switch
The power switch is an N-channel MOSFET with a maximum on-state resistance of 95 mΩ (VI(IN) = 5.5 V),
configured as a high-side switch.
charge pump
An internal 100-kHz charge pump supplies power to the driver circuit and provides the necessary voltage to pull
the gate of the MOSFET above the source. The charge pump operates from input voltages as low as 2.7 V and
requires very little supply current.
2
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TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
detailed description (continued)
driver
The driver controls the gate voltage of the power switch. To limit large current surges and reduce the associated
electromagnetic interference (EMI) produced, the driver incorporates circuitry that controls the rise times and
fall times of the output voltage. The rise and fall times are typically in the 2-ms to 4-ms range instead of the
microsecond or nanosecond range for a standard FET.
enable (EN)
A logic high on the EN input turns off the power switch and the bias for the charge pump, driver, and other circuitry
to reduce the supply current to less than 10 µA. A logic zero input restores bias to the drive and control circuits
and turns the power on. The enable input is compatible with both TTL and CMOS logic levels.
current sense
A sense FET monitors the current supplied to the load. The sense FET is a much more efficient way to measure
current 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 voltage and drives
the power FET into its linear region, which switches the output into a constant current mode and simply holds
the current constant while varying the voltage on the load.
thermal sense
An internal thermal-sense circuit shuts the power switch off when the junction temperature rises to
approximately 180°C. Hysteresis is built into the thermal sense, and after the device has cooled approximately
20 degrees, the switch turns back on. The switch continues to cycle off and on until the fault is removed.
TPS201xY chip information
This chip, when properly assembled, displays characteristics similar to the TPS201xC. Thermal compression
or ultrasonic bonding may be used on the doped aluminum bonding pads. The chip may be mounted with
conductive epoxy or a gold-silicon preform.
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TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
BONDING PAD ASSIGNMENTS
(8)
(1)
(7)
GND
IN
IN
EN
(1)
(8)
(2)
(7)
(3)
TPS201xY
(4)
(6)
(5)
OUT
OUT
OUT
OUT
(2)
81
(3)
CHIP THICKNESS: 15 MILS TYPICAL
BONDING PADS: 4 × 4 MILS MINIMUM
TJmax = 150°C
TOLERANCES ARE ± 10%
(4)
(5)
(6)
ALL DIMENSIONS ARE IN MILS
72
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Input voltage range, VI(IN) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to VI(IN) + 0.3 V
Input voltage range, VI at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . internally limited
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 125°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltages are with respect to GND.
DISSIPATION RATING TABLE
4
PACKAGE
TA ≤ 25°C
POWER RATING
D
PW
725 mW
700 mW
DERATING FACTOR
ABOVE TA = 25°C
5.8 mW/°C
5.6 mW/°C
POST OFFICE BOX 655303
TA = 70°C
POWER RATING
TA = 125°C
POWER RATING
464 mW
448 mW
145 mW
140 mW
• DALLAS, TEXAS 75265
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
recommended operating conditions
Input voltage, VI(IN)
Input voltage, VI at EN
Continuous output current
current, IO
MIN
MAX
2.7
5.5
V
V
0
5.5
TPS2010
0
0.2
TPS2011
0
0.6
TPS2012
0
1
TPS2013
0
1.5
– 40
125
Operating virtual junction temperature, TJ
UNIT
A
°C
electrical characteristics over recommended operating junction temperature range, VI(IN) = 5.5 V,
IO = rated current, EN = 0 V (unless otherwise noted)
power switch
TPS2010, TPS2011
TPS2012, TPS2013
TEST CONDITIONS†
PARAMETER
MIN
UNIT
TYP
MAX
95
VI(IN) = 5.5 V,
VI(IN) = 4.5 V,
TJ = 25°C
TJ = 25°C
75
80
110
VI(IN) = 3 V,
VI(IN) = 2.7 V,
TJ = 25°C
TJ = 25°C
120
175
140
215
Output leakage current
EN = VI(IN)
TJ = 25°C
– 40°C ≤ TJ ≤ 125°C
tr
Output rise time
VI(IN) = 5.5 V,
VI(IN) = 2.7 V,
TJ = 25°C,
TJ = 25°C,
CL = 1 µF
4
CL = 1 µF
3.8
tf
Output fall time
VI(IN) = 5.5 V,
VI(IN) = 2.7 V,
TJ = 25°C,
TJ = 25°C,
CL = 1 µF
3.9
CL = 1 µF
3.5
On state resistance
On-state
0.001
1
10
mΩ
µA
ms
ms
† Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.
enable input (EN)
PARAMETER
TPS2010, TPS2011
TPS2012, TPS2013
TEST CONDITIONS
MIN
2.7 V ≤ VI(IN) ≤ 5.5 V
High-level input voltage
Low level input voltage
Low-level
tPLH
tPHL
TYP
UNIT
MAX
2
V
4.5 V ≤ VI(IN) ≤ 5.5 V
0.8
2.7 V ≤ VI(IN) < 4.5 V
0.4
Input current
EN = 0 V or EN = VI(IN)
Propagation (delay) time, low-to-high-level output
CL = 1 µF
– 0.5
0.5
20
Propagation (delay) time, high-to-low-level output
CL = 1 µF
40
V
µA
ms
current limit
PARAMETER
Short circuit current
Short-circuit
TPS2010, TPS2011
TPS2012, TPS2013
TEST CONDITIONS†
TJ = 25°C
25 C,
VI(IN) = 5.5 V,
OUT connected to GND, device
enabled into short circuit
UNIT
MIN
TYP
MAX
TPS2010
0.22
0.4
0.6
TPS2011
0.66
1.2
1.8
TPS2012
1.1
2
3
A
TPS2013
1.65
2.6
4.5
† Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.
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TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
electrical characteristics over recommended operating junction temperature range, VI(IN) = 5.5 V,
IO = rated current, EN = 0 V (unless otherwise noted) (continued)
supply current
PARAMETER
TEST CONDITIONS
TPS2010, TPS2011
TPS2012, TPS2013
MIN
UNIT
TYP
MAX
1
level output
Supply current
current, low
low-level
TJ = 25°C
– 40°C ≤ TJ ≤ 125°C
0.015
EN = VI(IN)
Supply current,
current high-level
high level output
EN = 0 V
TJ = 25°C
– 40°C ≤ TJ ≤ 125°C
73
10
100
100
µA
µA
electrical characteristics over recommended operating junction temperature range, VI(IN) = 5.5 V,
IO = rated current, EN = 0 V, TJ = 25°C (unless otherwise noted)
power switch
TEST CONDITIONS†
PARAMETER
TPS2010Y, TPS2011Y
TPS2012Y, TPS2013Y
MIN
On state resistance
On-state
TYP
VI(IN) = 5.5 V,
VI(IN) = 4.5 V,
75
VI(IN) = 3 V,
VI(IN) = 2.7 V,
120
UNIT
MAX
80
mΩ
140
Output leakage current
EN = VI(IN)
Output rise time
VI(IN) = 5.5 V,
VI(IN) = 2.7 V,
CL = 1 µF
4
CL = 1 µF
3.8
Output fall time
VI(IN) = 5.5 V,
VI(IN) = 2.7 V,
CL = 1 µF
3.9
CL = 1 µF
3.5
µA
0.001
ms
ms
† Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.
current limit
TEST CONDITIONS†
PARAMETER
TPS2010Y, TPS2011Y
TPS2012Y, TPS2013Y
MIN
VI(IN) = 5.5 V,
OUT connected to GND,
Device enabled into short circuit
Short-circuit current
TYP
UNIT
MAX
0.4
A
† Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.
supply current
PARAMETER
TEST CONDITIONS
TPS2010Y, TPS2011Y
TPS2012Y, TPS2013Y
MIN
Supply current, low-level output
EN = VI(IN)
Supply current, high-level output
EN = 0 V
6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TYP
UNIT
MAX
0.015
µA
73
µA
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
4
2
0
6
4
2
0
–1
6
Enable Voltage – V
6
V O – Output Voltage – V
V O – Output Voltage – V
Enable Voltage – V
PARAMETER MEASUREMENT INFORMATION
0
1
2
3
4
5
6
7
8
9
4
2
0
6
4
2
0
–1
0
5
10
t – Time – ms
Enable Voltage – V
4
2
0
4
2
0
0
1
2
3
4
5
20
25
30
35
40
45
Figure 2. Propagation Delay and
Fall Time With 1-µF Load, VI(IN) = 5.5 V
V O – Output Voltage – V
V O – Output Voltage – V
Enable Voltage – V
Figure 1. Propagation Delay and
Rise Time With 1-µF Load, VI(IN) = 5.5 V
–1
15
t – Time – ms
6
7
8
9
4
2
0
4
2
0
–1
0
5
t – Time – ms
10
15
20
25
30
35
40
45
t – Time – ms
Figure 3. Propagation Delay and
Rise Time With 1-µF Load, VI(IN) = 2.7 V
POST OFFICE BOX 655303
Figure 4. Propagation Delay and
Fall Time With 1-µF Load, VI(IN) = 2.7 V
• DALLAS, TEXAS 75265
7
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
V O – Output Voltage – V
5
0
8
6
I O – Output Current – A
I O – Output Current – A
V O – Output Voltage – V
PARAMETER MEASUREMENT INFORMATION
4
2
0
–1
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
8
6
4
2
0
–1
0
0.5
1
t – Time – ms
5
0
8
2.5
3
3.5
4
4.5
5
0
8
6
I O – Output Current – A
I O – Output Current – A
6
4
2
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
4
2
0
–1
0
t – Time – ms
0.5
1
1.5
2
2.5
3
3.5
4
4.5
t – Time – ms
Figure 7. TPS2012, Short-Circuit Current.
Short is Applied to Enabled Device, VI(IN) = 5.5 V
8
2
Figure 6. TPS2011, Short-Circuit Current.
Short is Applied to Enabled Device, VI(IN) = 5.5 V
V O – Output Voltage – V
V O – Output Voltage – V
Figure 5. TPS2010, Short-Circuit Current.
Short is Applied to Enabled Device, VI(IN) = 5.5 V
–1
1.5
t – Time – ms
POST OFFICE BOX 655303
Figure 8. TPS2013 – Short-Circuit Current.
Short is Applied to Enabled Device, VI(IN) = 5.5 V
• DALLAS, TEXAS 75265
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
V O – Output Voltage – V
V O – Output Voltage – V
PARAMETER MEASUREMENT INFORMATION
5
0
I O – Output Current – A
I O – Output Current – A
0
4
3
3
2
1
0
–1
5
0
2
4
6
8
10
12
14
16
18
20
2
1
0
–1
0
2
4
6
t – Time – ms
V O – Output Voltage – V
V O – Output Voltage – V
12
14
16
18
20
Figure 10. TPS2011 – Threshold Current,
VI(IN) = 5.5 V
5
0
4
3
5
0
8
6
I O – Output Current – A
I O – Output Current – A
10
t – Time – ms
Figure 9. TPS2010 – Threshold Current,
VI(IN) = 5.5 V
2
1
0
–1
8
0
2
4
6
8
10
12
14
16
18
20
4
2
0
–1
0
2
4
t – Time – ms
6
8
10
12
14
16
18
20
t – Time – ms
Figure 11. TPS2012 – Threshold Current,
VI(IN) = 5.5 V
POST OFFICE BOX 655303
Figure 12. TPS2013 – Threshold Current,
VI(IN) = 5.5 V
• DALLAS, TEXAS 75265
9
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
PARAMETER MEASUREMENT INFORMATION
3
IO – Output Current – A
2.5
TPS2013
2
TPS2012
1.5
TPS2011
1
0.5
TPS2010
0
–1
0
1
2
3
4
5
6
7
8
9
10
t – Time – ms
Figure 13. Turned-On (Enabled) Into Short Circuit, VI(IN) = 5.5 V
VI
IN
OUT
IN
VI
VI(EN)
50%
50%
OUT
TPS201x
ENABLE
VO
GND
OUT
OUT
tPLH
tPHL
VI
90% 90%
EN
CL
GND
10%
VO
10%
tr
TEST CIRCUIT
tf
VOLTAGE WAVEFORMS
Figure 14. Test Circuit and Voltage Waveforms
10
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
GND
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
TYPICAL CHARACTERISTICS
TURN-ON DELAY TIME
vs
INPUT VOLTAGE
TURN-OFF DELAY TIME
vs
INPUT VOLTAGE
4.9
25
TJ = 25°C
RL = 50 Ω
CL = 1 µF
TJ = 25°C
RL = 50 Ω
CL = 1 µF
Turn-Off Delay Time – ms
Turn-On Delay Time – ms
4.7
4.5
4.3
4.1
3.9
20
15
10
3.7
3.5
2.5
3
3.5
4.5
4
5
5
2.5
5.5
3
3.5
VI – Input Voltage – V
Figure 15
4.5
5
5.5
Figure 16
FALL TIME
vs
OUTPUT CURRENT
RISE TIME
vs
OUTPUT CURRENT
4
5
TJ = 25°C
CL = 1 µF
TJ = 25°C
CL = 1 µF
3.8
4.5
3.6
tf – Fall Time – ms
tr – Rise Time – ms
4
VI – Input Voltage – V
4
3.5
VI = 5.5 V
VI = 2.7 V
3
3.4
3.2
VI = 5.5 V
3
2.8
VI = 2.7 V
2.6
2.4
2.5
2.2
2
2
0
0.3
1.2
0.6
0.9
IO – Output Current – A
1.5
0
Figure 17
0.3
1.2
0.6
0.9
IO – Output Current – A
1.5
Figure 18
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11
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
TYPICAL CHARACTERISTICS
SUPPLY CURRENT (OUTPUT DISABLED)
vs
JUNCTION TEMPERATURE
SUPPLY CURRENT (OUTPUT ENABLED)
vs
JUNCTION TEMPERATURE
10
IO = 0 A
70
I DD – Supply Current (Output Disabled) – µ A
I DD – Supply Current (Output Enabled) – µ A
80
VI = 5.5 V
60
50
40
VI = 2.7 V
30
20
– 50
1
0.1
VI = 5.5 V
0.01
VI = 2.7 V
0.001
– 25
0
25
50
75
100
TJ – Junction Temperature – °C
– 50
125
– 25
Figure 19
75
100
125
10
IO = 0 A
I DD – Supply Current (Output Disabled) – µ A
I DD – Supply Current (Output Enabled) – µ A
50
SUPPLY CURRENT (OUTPUT DISABLED)
vs
INPUT VOLTAGE
80
70
60
TJ = 125°C
50
TJ = 25°C
40
3
3.5
4
4.5
VI – Input Voltage – V
5
5.5
TJ = 125°C
1
0.1
0.01
TJ = 25°C
0.001
2.5
Figure 21
12
25
Figure 20
SUPPLY CURRENT (OUTPUT ENABLED)
vs
INPUT VOLTAGE
30
2.5
0
TJ – Junction Temperature – °C
3
3.5
4
4.5
VI – Input Voltage – V
Figure 22
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• DALLAS, TEXAS 75265
5
5.5
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
TYPICAL CHARACTERISTICS
ON-STATE RESISTANCE
vs
JUNCTION TEMPERATURE
ON-STATE RESISTANCE
vs
INPUT VOLTAGE
190
140
170
130
ron – On-State Resistance – mΩ
ron – On-State Resistance – mΩ
TJ = 25°C
150
VI = 2.7 V
130
110
ÁÁ
ÁÁ
VI = 3 V
VI = 4.5 V
– 25
0
100
25
90
80
70
VI = 5.5 V
50
– 50
110
ÁÁ
ÁÁ
90
70
120
50
75
100
60
2.5
125
TJ – Junction Temperature – °C
3
Figure 23
4
4.5
5
5.5
Figure 24
SHORT-CIRCUIT CURRENT
vs
INPUT VOLTAGE
INPUT VOLTAGE TO OUTPUT VOLTAGE
vs
INPUT VOLTAGE
3
0.25
TPS2013
2.5
0.2
Short-Circuit Current – A
VI to VO – Input Voltage to Output Voltage – V
3.5
VI – Input Voltage – V
0.15
IO = 1.5 A
0.1
IO = 1 A
2
TPS2012
1.5
TPS2011
1
IO = 600 mA
0.05
0.5
IO = 200 mA
0
2.5
3
3.5
4
4.5
VI – Input Voltage – V
TPS2010
5
5.5
0
2.5
3
Figure 25
3.5
4
4.5
VI – Input Voltage – V
5
5.5
Figure 26
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13
TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
TYPICAL CHARACTERISTICS
THRESHOLD TRIP CURRENT
vs
INPUT VOLTAGE
SHORT-CIRCUIT CURRENT
vs
JUNCTION TEMPERATURE
5.5
3
VI(IN) = 5.5 V
5
TPS2013
TPS2013
4.5
Short-Circuit Current – A
Threshold Trip Current – A
2.5
TPS2012
4
3.5
TPS2011
3
2.5
TPS2012
2
1.5
TPS2011
1
TPS2010
1.5
2.5
TPS2010
0.5
2
3
3.5
4.5
4
5
0
– 50
5.5
– 25
VI – Input Voltage – V
0
25
50
75
100
125
TJ – Junction Temperature – °C
Figure 27
Figure 28
APPLICATION INFORMATION
TPS2010D
2
Power Supply
2.7 V – 5.5 V
3
+
1 µF
IN
OUT
IN
OUT
0.1 µF
OUT
OUT
External Load
5
6
7
8
0.1 µF
4
Load Enable
EN
GND
1
Figure 29. Typical Application
power supply considerations
The TPS201x family has multiple inputs and outputs, which must be connected in parallel to minimize voltage
drop and prevent unnecessary power dissipation.
A 0.047-µF to 0.1-µF ceramic bypass capacitor between IN and GND, close to the device, is recommended.
A high-value electrolytic capacitor is also desirable when the output load is heavy or has large paralleled
capacitors. Bypassing the output with a 0.1-µF ceramic capacitor improves the immunity of the device to
electrostatic discharge (ESD).
14
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TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
APPLICATION INFORMATION
overcurrent
A sense FET is employed to check for overcurrent conditions. Unlike sense resistors and polyfuses, sense FETs
do not increase series resistance to the current path. When an overcurrent condition is detected, the device
maintains a constant output current and reduces the output voltage accordingly. Shutdown only occurs if the
fault is present long enough to activate thermal limiting.
Three possible overload conditions can occur. In the first condition, the output has been shorted before the
device is enabled or before VI(IN) has been applied (see Figure 30). The TPS201x senses the short and
immediately switches into a constant-current output.
Under the second condition, the short occurs while the device is enabled. At the instant the short occurs, very
high currents flow for a short time before the current-limit circuit can react (see Figures 5, 6, 7, and 8). After the
current-limit circuit has tripped, the device limits normally.
Under the third condition, the load has been gradually increased beyond the recommended operating current.
The current is permitted to rise until the current-limit threshold is reached (see Figures 9, 10, 11, and 12). The
TPS201x family is capable of delivering currents up to the current-limit threshold without damage. Once the
threshold has been reached, the device switches into its constant-current mode.
3
IO– Output Current – A
2.5
TPS2013
2
TPS2012
1.5
TPS2011
1
0.5
TPS2010
0
0
1
2
3
4
5
6
7
8
9
10
t – Time – ms
Figure 30. Turned-On (Enabled) Into Short Circuit, VI(IN) = 5.5 V
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TPS2010, TPS2011, TPS2012, TPS2013
POWER-DISTRIBUTION
SLVS097A – DECEMBER 1994 – REVISED AUGUST 1995
APPLICATION INFORMATION
power dissipation and junction temperature
The low on resistance of the N-channel MOSFET allows small surface-mount packages, such as SOIC or
TSSOP to pass large currents. The thermal resistances of these packages are high compared to that of power
packages; it is good design practice to check power dissipation and junction temperature. The first step is to
find ron at the input voltage and operating temperature. As an initial estimate, use the highest operating ambient
temperature of interest and read ron from Figure 23. Next calculate the power dissipation using:
P
D
+ ron
I2
Finally, calculate the junction temperature:
T
J
+ PD
R
qJA
) TA
Where:
TA = Ambient temperature
RθJA = Thermal resistance SOIC = 172°C/W, TSSOP = 179°C/W
Compare the calculated junction temperature with the initial estimate. If they do not agree within a few degrees,
repeat the calculation using the calculated value as the new estimate. Two or three iterations are generally
sufficient to get a reasonable answer.
thermal protection
Thermal protection is provided to prevent damage to the IC when heavy-overload or short-circuit faults are
present for extended periods of time. The faults force the TPS201x into its constant current mode, which causes
the voltage across the high-side switch to increase; under short-circuit conditions, the voltage across the switch
is equal to the input voltage. The increased dissipation causes the junction temperature to rise to dangerously
high levels. The protection circuit senses the junction temperature of the switch and shuts it off. The switch
remains off until the junction has dropped approximately 20°C. The switch continues to cycle in this manner until
the load fault or input power is removed.
ESD protection
All TPS201x terminals incorporate ESD-protection circuitry designed to withstand a 6-kV human-body-model
discharge as defined in MIL-STD-883C. Additionally, the output is protected from discharges up to 12 kV.
16
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