Texas Instruments TPS2041D, TPS2041P, TPS2051D, TPS2051P Schematic [ru]

MAXIMUM CONTINUOUS

D

135-mΩ -Maximum (5-V Input) High-Side
MOSFET Switch

D

500 mA Continuous Current

D

Short-Circuit and Thermal Protection With
Overcurrent Logic Output

D

Operating Range . . . 2.7 V to 5.5 V

D

Logic-Level Enable Input

D

2.5-ms Typical Rise Time

D

Undervoltage Lockout

D

10 µA Maximum Standby Supply Current

D

Bidirectional Switch

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

D

UL Listed – File No. E169910

description

TPS2041, TPS2051

POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 1999

TPS2041

D OR P PACKAGE

(TOP VIEW)

GND

GND

1

IN

2

IN

3
4

EN

TPS2051

D OR P PACKAGE

(TOP VIEW)

1

IN

2

IN

3
4

EN

OUT

8

OUT

7

OUT

6
5

OC

OUT

8

OUT

7

OUT

6
5

OC

The TPS2041 and TPS2051 power distribution switches are intended for applications where heavy capacitive
loads and short circuits are likely to be encountered. The TPS2041 and the TPS2051 are 135-mΩ N-channel
MOSFET high-side power switches. Each switch is controlled by a logic enable compatible with 5-V and 3-V
logic. Gate drive is provided by an internal charge pump that controls 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 TPS2041 and TPS2051 limit
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 in overcurrent 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 TPS2041 and TPS2051 are designed to limit at 0.9-A load. These power distribution switches are available
in 8-pin small-outline integrated circuit (SOIC) and 8-pin plastic dual-in-line packages (PDIP) and operate over
an ambient temperature range of –40°C to 85°C.

AVAILABLE OPTIONS

RECOMMENDED

T

A

–40°C to 85°C Active low 0.5 0.9 TPS2041D TPS2041P
–40°C to 85°C Active high 0.5 0.9 TPS2051D TPS2051P

†

The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2041DR)

ENABLE

LOAD CURRENT

(A)

TYPICAL SHORT-CIRCUIT

CURRENT LIMIT AT 25°C

(A)

PACKAGED DEVICES

SOIC

(D)

†

PDIP

(P)

This document contains information on products in more than one phase
of development. The status of each device is indicated on the page(s)
specifying its electrical characteristics.

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  1999, Texas Instruments Incorporated

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

1

TPS2041, TPS2051

I/O

DESCRIPTION

POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 1999

TPS2041 functional block diagram

IN

Charge

Pump

Power Switch

CS

†

OUT

EN

GND

†

Current Sense

Driver

UVLO

Thermal

Sense

Current

Limit

Terminal Functions

TERMINAL

NO.

NAME

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

D OR P

TPS2041 TPS2051

OC

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

detailed description

power switch

TPS2041, TPS2051

POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 1999

The power switch is an N-channel MOSFET with a maximum on-state resistance of 135 mΩ (V
Configured as a high-side switch, the power switch prevents current flow from OUT to IN and IN to OUT when
disabled. The power switch supplies a minimum of 500 mA per switch.

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 4-ms range.

enable (EN or EN)

The logic enable disables the power switch and 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 (TPS2041) or a logic low is present
on EN (TPS2051). A logic zero input on EN or a logic high 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.

overcurrent (OC)

The OC
encountered. The output will remain asserted until the overcurrent or overtemperature condition is removed.

current sense

open drain output is asserted (active low) when an overcurrent or overtemperature condition is

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

TPS2041, TPS2051

UNIT

POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 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 MIL-STD-883C 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(ENx)

(see Note 1) –0.3 V to V

or V

I(ENx)

O(OUT)

J

stg

Machine model 0.2 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

TPS2041 TPS2051

MIN MAX MIN MAX

Input voltage, V
Input voltage, V
Continuous output current, I
Operating virtual junction temperature, T

I(IN)
I(EN

or V

)

I(EN)

O(OUT)

J

2.7 5.5 2.7 5.5 V
0 5.5 0 5.5 V
0 500 0 500 mA

–40 125 –40 125 °C

†

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER

TEST CONDITIONS

†

UNIT

resistance, 5-V o eration

r

resistance, 3.3-V o eration

trRise time, output

ms

tfFall time, output

ms

PARAMETER

TEST CONDITIONS

UNIT

VILLow-level input voltage

IIInput current

A

PARAMETER

TEST CONDITIONS

†

UNIT

TPS2041, TPS2051

POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 1999

electrical characteristics over recommended operating junction temperature range, V

= rated current, V

I

O

I(EN)

= 0 V, V

= Hi (unless otherwise noted)

I(EN)

I(IN)

= 5.5 V,

power switch

TPS2041 TPS2051

MIN TYP MAX MIN TYP MAX

V

= 5 V, TJ = 25°C 80 95 80 95

Static drain-source on-state

DS(on)

Static drain-source on-state

†

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

-

p

-

p

p

p

I(IN)

V

= 5 V, TJ = 85°C 90 120 90 120

I(IN)

V

= 5 V, TJ = 125°C 100 135 100 135

I(IN)

V

= 3.3 V, TJ = 25°C 85 105 85 105

I(IN)

V

= 3.3 V, TJ = 85°C 100 135 100 135

I(IN)

V

= 3.3 V, TJ = 125°C 115 150 115 150

I(IN)

V

= 5.5 V,

I(IN)

CL = 1 µF,
V

= 2.7 V,

I(IN)

CL = 1 µF,
V

= 5.5 V,

I(IN)

CL = 1 µF,
V

= 2.7 V,

I(IN)

CL = 1 µF,

TJ = 25°C,
RL = 10 Ω

TJ = 25°C,
RL = 10 Ω

TJ = 25°C,
RL = 10 Ω

TJ = 25°C,
RL = 10 Ω

2.5 2.5

3 3

4.4 4.4

2.5 2.5

mΩ

enable input EN or EN

TPS2041 TPS2051

MIN TYP MAX MIN TYP MAX

V

High-level input voltage 2.7 V ≤ V

IH

p

p

t

Turnon time CL = 100 µF, RL = 10 Ω 20 20 ms

on

t

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

off

TPS2041 V
TPS2051 V

4.5 V ≤ V

2.7 V ≤ V
I(EN)

I(EN)

≤ 5.5 V 2 2 V

I(IN)

≤ 5.5 V 0.8 0.8 V

I(IN)

≤ 4.5 V 0.4 0.4

I(IN)

= 0 V or V
= V

I(IN)

I(EN)

or V

= V

I(IN)

= 0 V –0.5 0.5

I(EN)

–0.5 0.5

µ

current limit

I

OS

†

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

Short-circuit output current

V

= 5 V, OUT connected to GND,

I(IN)

Device enabled into short circuit

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS2041 TPS2051

MIN TYP MAX MIN TYP MAX

0.7 0.9 1.1 0.7 0.9 1.1 A

5

TPS2041, TPS2051

PARAMETER

TEST CONDITIONS

UNIT

TPS2041

y,

A

EN

V

TPS2051

EN

V

TPS2041

y,

A

EN

V

TPS2051

Leakage current

d

A

g

g

T

25°C

A

PARAMETER

TEST CONDITIONS

UNIT

PARAMETER

TEST CONDITIONS

UNIT

POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 1999

electrical characteristics over recommended operating junction temperature range, V

= rated current, V

I

O

I(EN)

= 0 V, V

= Hi (unless otherwise noted) (continued)

I(EN)

I(IN)

= 5.5 V,

supply current

TPS2041 TPS2051

MIN TYP MAX MIN TYP MAX

Supply current, No Load
low-level output on OUT

Supply current, No Load
high-level output on OUT

OUT
connecte
to ground

Reverse leakage IN = High
current

impedance

EN = V

= 0

= 0

=

EN = V
EN= 0 V –40°C ≤ TJ ≤ 125°C TPS2051 100

V

I(EN)

V

I(EN)

TJ = 25°C

I(IN)

–40°C ≤ TJ ≤ 125°C
TJ = 25°C
–40°C ≤ TJ ≤ 125°C
TJ = 25°C
–40°C ≤ TJ ≤ 125°C
TJ = 25°C

I(IN)

–40°C ≤ TJ ≤ 125°C
–40°C ≤ TJ ≤ 125°C TPS2041 100

I(IN)

= 0 V
= Hi

°

=

J

TPS2041 0.3
TPS2051 0.3

0.015 1
10

0.015 1
10

80 100

100

80 100

100

undervoltage lockout

TPS2041 TPS2051

MIN TYP MAX MIN TYP MAX

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

µ

µ

µ

µ

overcurrent OC

Sink current
Output low voltage IO = 5 V, V
Off-state current

†

Specified by design, not production tested.

†

†

VO = 5 V 10 10 mA

VO = 5 V, VO = 3.3 V 1 1 µA

OL(OC)

TPS2041 TPS2051

MIN TYP MAX MIN TYP MAX

0.5 0.5 V

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS2041, TPS2051

POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 1999

PARAMETER MEASUREMENT INFORMATION

OUT

V

I(EN)

(5 V/div)

V

I(EN)

V

O(OUT)

t

RL CL

V

O(OUT)

TEST CIRCUIT

50%

t

on

50%

90%

10%

V

I(EN)

t

off

V

O(OUT)

VOLTAGE WA VEFORMS

r

90%

90%

10%

50%

t

on

10%

50%

90%

10%

t

f

t

off

Figure 1. Test Circuit and Voltage Waveforms

V

I(EN)

(5 V/div)

V

O(OUT)

(2 V/div)

V

= 5 V

I(IN)

TA = 25°C
CL = 0.1 µF

0123456

t – Time – ms

78910

Figure 2. Turnon Delay and Rise Time

with 0.1-µF Load

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

V

O(OUT)

(2 V/div)

V

= 5 V

I(IN)

TA = 25°C
CL = 0.1 µF

0 1000 2000 3000

t – Time – ms

4000 5000

Figure 3. Turnoff Delay and Fall Time

with 0.1-µF Load

7

TPS2041, TPS2051
POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 1999

PARAMETER MEASUREMENT INFORMATION

V

I(EN)

(5 V/div)

V

V

O(OUT)

(2 V/div)

0123456

t – Time – ms

TA = 25°C
CL = 1 µF
RL = 10 Ω

= 5 V

I(IN)

78910

V

I(EN)

(5 V/div)

V

O(OUT)

(2 V/div)

V

= 5 V

I(IN)

TA = 25°C
CL = 1 µF
RL = 10 Ω

0 2 4 6 8 10 12

t – Time – ms

14 16 18 20

Figure 4. Turnon Delay and Rise Time

with 1-µF Load

V

I(EN)

(5 V/div)

I

O(OUT)

(0.2 A/div)

0123 4 5 6

t – Time – ms

Figure 6. TPS2041, Short-Circuit Current,

Device Enabled into Short

V

= 5 V

I(IN)

TA = 25°C

78910

V

O(OUT)

(2 V/div)

I

O(OUT)

(0.5 A/div)

Figure 5. Turnoff Delay and Fall Time

with 1-µF Load

V

= 5 V

I(IN)

TA = 25°C

01020 30405060

t – Time – ms

70 80 90 100

Figure 7. TPS2041, Threshold Trip Current

with Ramped Load on Enabled Device

8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265