TPS2377D datasheet(3/21 Pages) TI

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RECOMMENDED OPERATING CONDITIONS

ELECTRICAL CHARACTERISTICS

TPS2375

TPS2376

TPS2377

SLVS525A – APRIL 2004 – REVISED SEPTEMBER 2004

MIN

MAX

UNIT

VDD, PG, RTN

Input voltage range

UVLO

Operating current range (sinking)

RTN

350

Classification resistor(1)

CLASS

255

4420

Ω

R(ILIM) Inrush limit program resistor (1)

62.5

500

Ω

Sinking current

Operating junction temperature

-40

125

°C

Operating free–air temperature

-40

°C

(1)

Voltage should not beexternally applied to CLASS and ILIM.

(VDD) = 48 V, R(DET) = 24.9 kΩ, R(CLASS) = 255 Ω, R(ILIM) = 178 kΩ, and –40°C ≤ TJ≤ 125°C, unless otherwise noted. Positive

currents are into pins. V

(UVLO) = 0 V for classification and V(UVLO) = 5 V otherwise for the TPS2376. Typical values are at 25°C.

All voltages are with respect to VSS unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DETECTION

DET open, V(VDD) = V(RTN) = 1.9 V, measure

Offset current

0.3

µA

I(VDD) + I(RTN)

DET open, V(VDD) = V(RTN) = 10.1 V, measure

Sleep current

µA

I(VDD) + I(RTN)

DET leakage current

V(DET) = V(VDD) = 57 V, measure I(DET)

0.1

µA

V(RTN) = V(VDD),

V(VDD) = 1.4 V

53.7

58.3

µA

R(DET) = 24.9 kΩ,

Detection current

measure I(VDD) + I(RTN) +

V(VDD) = 10.1 V

395

410

417

µA

I(DET)

CLASSIFICATION

R(CLASS) = 4420 Ω, 13 ≤ V(VDD)≤ 21 V

2.2

2.4

2.8

R(CLASS) = 953 Ω, 13 ≤ V(VDD)≤ 21 V

10.3

10.6

11.3

I(CLASS)

Classification current(1)

R(CLASS) = 549 Ω, 13 ≤ V(VDD)≤ 21 V

17.7

18.3

19.5

R(CLASS) = 357 Ω, 13 ≤ V(VDD)≤ 21 V

27.1

28.0

29.5

R(CLASS) = 255 Ω, 13 ≤ V(VDD)≤ 21 V

38.0

39.4

41.2

V(CL_ON)

Classification lower threshold

Regulator turns on, V(VDD) rising

10.2

11.3

13.0

V(CU_OFF)

Regulator turns off, V(VDD) rising

21.9

Classification upper threshold

V(CU_H)

Hysteresis(2)

0.5

0.78

Leakage current

V(CLASS) = 0 V, V(VDD) = 57 V

µA

PASS DEVICE

rDS(on)

On resistance

I(RTN) = 300 mA

0.58

1.0

Ω

V(VDD) = V(RTN) = 30 V,

Leakage current

µA

V(UVLO) = 0 V (TPS2376)

Current limit

V(RTN) = 1 V

405

461

515

I(LIM)

Inrush limit

V(RTN) = 2 V, R(ILIM) = 178 kΩ

100

130

180

V(RTN) falling, R(ILIM) = 178 kΩ, inrush

85%

91%

100%

Inrush current termination (3)

state

→normal operation

R(ILIM) = 69.8 kΩ, V(RTN-VSS) = 5 V,

Current rise time into inrush (2)

I(RTN) = 30 mA→300 mA, V(VDD) increasing

µs

past upper UVLO

Apply load

∞Ω→20 Ω, time measured to

2.5

Current limit response time(2)

µs

I(RTN) = 45 mA

Leakage current, ILIM

V(VDD) = 15 V, V(UVLO) = 0 V

µA

(1)

Classification is tested withexact resistor values. A 1% tolerance classification resistor assurescompliance with IEEE 802.3af limits.

(2)

Not tested inproduction.

(3)

This parameter specifies theRTN current value, as a percentage of the steady state inrush current, belowwhich it must fall to make PG

assert (open-drain).

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