TEXAS INSTRUMENTS TPS2020, TPS2021, TPS2022, TPS2023, TPS2024 Technical data

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D

33-mΩ (5-V Input) High-Side MOSFET
Switch

D

Short-Circuit and Thermal Protection

D

Overcurrent Logic Output

D

Operating Range . . . 2.7 V to 5.5 V

D

Logic-Level Enable Input

D

Typical Rise Time . . . 6.1 ms

D

Undervoltage Lockout

D

Maximum Standby Supply
Current ...10 µA

D

No Drain-Source Back-Gate Diode

D

Available in 8-pin SOIC and PDIP Packages

D

Ambient Temperature Range, –40°C to 85°C

D

2-kV Human-Body-Model, 200-V
Machine-Model ESD Protection

description

TPS2020, TPS2021, TPS2022, TPS2023, TPS2024

POWER-DISTRIBUTION SWITCHES

SLVS175A – DECEMBER 1998 – REVISED NOVEMBER 1999

D OR P PACKAGE

(TOP VIEW)

GND

IN
IN

EN

1
2
3
4

OUT

8

OUT

7

OUT

6
5

OC

The TPS202x family of power distribution switches is intended for applications where heavy capacitive loads
and short circuits are likely to be encountered. These devices are 50-mΩ N-channel MOSFET high-side power
switches. The switch is controlled by a logic enable compatible with 5-V logic and 3-V logic. Gate drive is
provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize
current surges during switching. The charge pump 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 is present, the TPS202x limits the output
current to a safe level by switching into a constant-current mode, pulling the overcurrent (OC

) logic output low.
When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the
junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from
a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures the switch
remains off until valid input voltage is present.

The TPS202x devices differ only in short-circuit current threshold. The TPS2020 limits at 0.3-A load, the
TPS2021 at 0.9-A load, the TPS2022 at 1.5-A load, the TPS2023 at 2.2-A load, and the TPS2024 at 3-A load
(see Available Options). The TPS202x is available in an 8-pin small-outline integrated-circuit (SOIC) package
and in an 8-pin dual-in-line (DIP) package and operates over a junction temperature range of –40°C to 125°C.

GENERAL SWITCH CATALOG

33 mΩ, single

80 mΩ, single

TPS201xA

TPS202x

TPS203x

TPS2014
TPS2015
TPS2041
TPS2051
TPS2045
TPS2055

0.2 A – 2 A

0.2 A – 2 A

0.2 A – 2 A

600 mA
1 A
500 mA
500 mA
250 mA
250 mA

80 mΩ, dual

IN1
IN2

260 mΩ

1.3 Ω

OUT

TPS2042
TPS2052
TPS2046
TPS2056

TPS2100/1

IN1 500 mA
IN2 10 mA

TPS2102/3/4/5

IN1 500 mA
IN2 100 mA

500 mA
500 mA
250 mA
250 mA

80 mΩ, triple

TPS2043
TPS2053
TPS2047
TPS2057

500 mA
500 mA
250 mA
250 mA

80 mΩ, quad

TPS2044
TPS2054
TPS2048
TPS2058

500 mA
500 mA
250 mA
250 mA

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.

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.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  1999, Texas Instruments Incorporated

1

TPS2020, TPS2021, TPS2022, TPS2023, TPS2024

MAXIMUM CONTINUOUS

POWER-DISTRIBUTION SWITCHES

SLVS175A – DECEMBER 1998 – REVISED NOVEMBER 1999

AVAILABLE OPTIONS

RECOMMENDED

T

A

–40°C to 85°C Active low

†

The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2020DR)

ENABLE

LOAD CURRENT

TPS2020 functional block diagram

IN

Charge

Pump

(A)

0.2 0.3 TPS2020D TPS2020P

0.6 0.9 TPS2021D TPS2021P
1 1.5 TPS2022D TPS2022P

1.5 2.2 TPS2023D TPS2023P
2 3 TPS2024D TPS2024P

Power Switch

TYPICAL SHORT-CIRCUIT

CURRENT LIMIT AT 25°C

(A)

CS

PACKAGED DEVICES

SMALL OUTLINE

†

(D)

†

OUT

PLASTIC DIP

(P)

EN

GND

†

Current Sense

UVLO

Driver

Thermal

Sense

Terminal Functions

TERMINAL

NAME

EN 4 I Enable input. Logic low turns on power switch.
GND 1 I Ground
IN 2, 3 I Input voltage
OC 5 O Overcurrent. Logic output active low
OUT 6, 7, 8 O Power-switch output

NO.

D OR P

I/O DESCRIPTION

Current

Limit

OC

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

detailed description

power switch

TPS2020, TPS2021, TPS2022, TPS2023, TPS2024

POWER-DISTRIBUTION SWITCHES

SLVS175A – DECEMBER 1998 – REVISED NOVEMBER 1999

The power switch is an N-channel MOSFET with a maximum on-state resistance of 50 mΩ (V
Configured as a high-side switch, the power switch prevents current flow from OUT to IN and IN to OUT when
disabled.

charge pump

An internal 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.

driver

The driver controls the gate voltage of the power switch. T o 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 9-ms range.

enable (EN

overcurrent (OC)

current sense

)

The logic enable disables the power switch, the bias for the charge pump, driver, and other circuitry to reduce
the supply current to less than 10 µA when a logic high is present on EN . A logic zero input on EN 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.

The OC open drain output is asserted (active low) when an overcurrent or overtemperature condition is
encountered. The output will remain asserted until the overcurrent or overtemperature condition is removed.

I(IN)

= 5 V).

A sense FET monitors the current supplied to the load. The sense FET 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 voltage and drives the power FET 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.

thermal sense

An internal thermal-sense circuit shuts off the power switch when the junction temperature rises to
approximately 140°C. Hysteresis is built into the thermal sense circuit. After the device has cooled
approximately 20°C, the switch turns back on. The switch continues to cycle off and on until the fault is removed.

undervoltage lockout

A voltage sense circuit monitors the input voltage. When the input voltage is below approximately 2 V , a control
signal turns off the power switch.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

TPS2020, TPS2021, TPS2022, TPS2023, TPS2024

Input voltage

POWER-DISTRIBUTION SWITCHES

SLVS175A – DECEMBER 1998 – REVISED NOVEMBER 1999

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Input voltage range, V
Output voltage range, V
Input voltage range, V
Continuous output current, I

Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating virtual junction temperature range, T
Storage temperature range, T

Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . .

Electrostatic discharge (ESD) protection: Human body model 2 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

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.

PACKAGE

D 725 mW 5.8 mW/°C 464 mW 377 mW
P 1175 mW 9.4 mW/°C 752 mW 611 mW

(see Note 1) –0.3 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I(IN)

O(OUT)

I(EN)

(see Note 1) –0.3 V to V

O(OUT)

J

stg

Machine model 200V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charged device model (CDM) 750 V. . . . . . . . . . . . . . . . . . . . . . . . .

DISSIPATION RATING TABLE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 85°C

POWER RATING

+ 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I(IN)

–0.3 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

internally limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

recommended operating conditions

MIN MAX UNIT

p

Continuous output current, I

Operating virtual junction temperature, T

O

V
V
TPS2020 0 0.2
TPS2021 0 0.6
TPS2022 0 1
TPS2023 0 1.5
TPS2024 0 2

I(IN)
I(EN)

J

2.7 5.5 V
0 5.5 V

A

–40 125 °C

†

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

r

DS(on)

Static drain-source on-state resistance

mΩ

trRise time, output

ms

tfFall time, output

ms

VILLow-level in ut voltage

V

ms

T

J

25 C

V

I

TPS2020, TPS2021, TPS2022, TPS2023, TPS2024

POWER-DISTRIBUTION SWITCHES

SLVS175A – DECEMBER 1998 – REVISED NOVEMBER 1999

electrical characteristics over recommended operating junction temperature range, V

= rated current, EN = 0 V (unless otherwise noted)

I

O

I(IN)

= 5.5 V,

power switch

PARAMETER

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

V

I(IN)

p

p

†

Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.

CL = 1 µF,
V

I(IN)

CL = 1 µF,
V

I(IN)

CL = 1 µF,
V

I(IN)

CL = 1 µF,

TEST CONDITIONS

= 5 V, TJ = 25°C, IO = 1.8 A 33 36
= 5 V, TJ = 85°C, IO = 1.8 A 38 46
= 5 V, TJ = 125°C, IO = 1.8 A 44 50
= 3.3 V, TJ = 25°C, IO = 1.8 A 37 41
= 3.3 V, TJ = 85°C, IO = 1.8 A 43 52
= 3.3 V, TJ = 125°C, IO = 1.8 A 51 61
= 5 V, TJ = 25°C, IO = 0.18 A 30 34
= 5 V, TJ = 85°C, IO = 0.18 A 35 41
= 5 V, TJ = 125°C, IO = 0.18 A 39 47
= 3.3 V, TJ = 25°C, IO = 0.18 A 33 37
= 3.3 V, TJ = 85°C, IO = 0.18 A 39 46
= 3.3 V, TJ = 125°C, IO = 0.18 A 44 56
= 5.5 V,

= 2.7 V,

= 5.5 V,

= 2.7 V,

TJ = 25°C,
RL = 10 Ω

TJ = 25°C,
RL = 10 Ω

TJ = 25°C,
RL = 10 Ω

TJ = 25°C,
RL = 10 Ω

†

MIN TYP MAX UNIT

6.1

8.6

3.4

3

enable input (EN)

PARAMETER TEST CONDITIONS

V

High-level input voltage 2.7 V ≤ V

IH

p

I

Input current EN= 0 V or EN = V

I

t

Turnon time CL = 100 µF, RL = 10 Ω 20

on

t

Turnoff time CL = 100 µF, RL = 10 Ω 40

off

4.5 V ≤ V

2.7 V ≤ V

≤ 5.5 V 2 V

I(IN)

≤ 5.5 V 0.8

I(IN)

≤ 4.5 V 0.5

I(IN)

I(IN)

MIN TYP MAX UNIT

–0.5 0.5 µA

current limit

PARAMETER

=

°

=

I

Short-circuit output current

OS

†

Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.

OUT connected to GND,
Device enable into short circuit

,

TEST CONDITIONS

=

= 5.5 V,

†

TPS2020 0.22 0.3 0.4
TPS2021 0.66 0.9 1.1
TPS2022 1.1 1.5 1.8
TPS2023 1.65 2.2 2.7
TPS2024 2.2 3 3.8

MIN TYP MAX UNIT

A

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

5

TPS2020, TPS2021, TPS2022, TPS2023, TPS2024

Supply current, low-level output

No Load on OUT

A

Supply current, high-level output

No Load on OUT

EN

V

A

POWER-DISTRIBUTION SWITCHES

SLVS175A – DECEMBER 1998 – REVISED NOVEMBER 1999

electrical characteristics over recommended operating junction temperature range, V

= rated current, EN = 0 V (unless otherwise noted) (continued)

I

O

I(IN)

= 5.5 V,

supply current

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

pp

pp

Leakage current OUT connected to ground EN = V

p

p

EN = V

= 0

TJ = 25°C 0.3 1

I(IN)

–40°C ≤ TJ ≤ 125°C 10
TJ = 25°C 58 75
–40°C ≤ TJ ≤ 125°C 75 100
–40°C ≤ TJ ≤ 125°C 10 µA

I(IN)

undervoltage lockout

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Low-level input voltage 2 2.5 V
Hysteresis TJ = 25°C 100 mV

overcurrent (OC)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Output low voltage IO = 10 mA, V
Off-state current

†

Specified by design, not production tested.

†

VO = 5 V, VO = 3.3 V 1 µA

OL(OC)

0.4 V

µ

µ

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS2020, TPS2021, TPS2022, TPS2023, TPS2024

POWER-DISTRIBUTION SWITCHES

SLVS175A – DECEMBER 1998 – REVISED NOVEMBER 1999

PARAMETER MEASUREMENT INFORMATION

OUT

RL CL

TEST CIRCUIT

V

V

O(OUT)

I(EN)

50%

t

on

VOLTAGE WAVEFORMS

50%

90%

V

10%

O(OUT)

t

r

90%

90%

10%

t

off

10%

t

f

Figure 1. Test Circuit and Voltage Waveforms

Table of Timing Diagrams

FIGURE

Turnon Delay and Rise TIme 2
Turnoff Delay and Fall Time 3
Turnon Delay and Rise TIme with 1-µF Load 4
Turnoff Delay and Rise TIme with 1-µF Load 5
Device Enabled into Short 6

TPS2020, TPS2021, TPS2022, TPS2023, and TPS2024, Ramped Load on Enabled Device
TPS2024, Inrush Current 12

7.9-Ω Load Connected to an Enabled TPS2020 Device 13

3.7-Ω Load Connected to an Enabled TPS2020 Device 14

3.7-Ω Load Connected to an Enabled TPS2021 Device 15

2.6-Ω Load Connected to an Enabled TPS2021 Device 16

2.6-Ω Load Connected to an Enabled TPS2022 Device 17

1.2-Ω Load Connected to an Enabled TPS2022 Device 18

1.2-Ω Load Connected to an Enabled TPS2023 Device 19

0.9-Ω Load Connected to an Enabled TPS2023 Device 20

0.9-Ω Load Connected to an Enabled TPS2024 Device 21

0.5-Ω Load Connected to an Enabled TPS2024 Device 22

7, 8, 9,

10, 11

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

7