TPS2421-2DDA datasheet(3/22 Pages) TI

Part #	TPS2421-2DDA

Description	3-V to 20-V Integrated FET Hot Swap

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Manufacturer	TI [Texas Instruments]

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ELECTRICAL CHARACTERISTICS

TPS2421-1

TPS2421-2

www.ti.com .................................................................................................................................................. SLUS907A – JANUARY 2009 – REVISED MARCH 2009

Unless otherwise noted: 3 V

≤ VIN ≤ 18 V, EN = 0 V, PG = FLT = open, ROUT = open, CLOAD = 0, RSET = 49.9 kΩ, –40°C ≤ TJ ≤

125°C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIN

UVLO

VIN rising

2.6

2.85

2.9

V

Hysteresis

150

mV

Bias current

EN = 2.4V

25

100

µA

EN = 0V

3.9

5

mA

VIN, VOUT

RVIN-VOUT, IVOUT < IRMAX or

RON

33

50

m

Ω

IVOUT < (ISET × 1.25), 1 A ≤ IVOUT ≤ 4.5 A

Power limit TPS242x

VIN: 12 V, COUT = 1000 µF EN: 3 V → 0 V

3

5

7.5

V

Reverse diode

VOUT > VIN , EN = 5 V, IIN = –1 A

0.77

1.0

voltage

ISET

IVOUT ↑, ICT: sinking → sourcing, pulsed test

RRSET = 200 kΩ

0.80

1.2

0°C

≤ TJ ≤ 85°C

RRSET = 100 kΩ

1.80

2.2

Fault current

ISET

RRSET = 49.9 kΩ

3.60

4.40

A

threshold

RRSET = 200 kΩ

0.75

1.25

-40°C

≤ TJ ≤ 125°C

RRSET = 100 kΩ

1.75

2.25

RRSET = 49.9 kΩ

3.60

4.40

RRSET = 200 kΩ

1.1

1.8

2.6

ILIM /

Ratio ILIM / IFLT

RRSET = 100 kΩ

1.1

1.5

2.1

IFLT

–

RRSET = 49.9 kΩ

1.1

1.4

1.6

RRSET = 200 kΩ

1.1

1.8

2.4

ILIM

Current limit

IVOUT rising, VVIN-VOUT = 0.3 V, pulsed test

RRSET = 100 kΩ

2.3

3.0

3.7

RRSET = 49.9 kΩ

4.6

5.5

6.3

CT

ICT sourcing, VCT = 1 V, In current limit

29

35

41

Charge/discharge

µA

current

ICT sinking, VCT = 1 V, drive CT to 1 V, measure current

1.0

1.4

1.8

VCT rising

1.3

1.4

1.5

Threshold voltage

V

VCT falling, drive CT to 1 V, measure current

0.1

0.16

0.3

ON/OFF fault duty

VVOUT = 0 V

2.8%

3.7%

4.6%

cycle

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