TPS2491DGS datasheet(4/20 Pages) TI

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TPS2490

TPS2491

SLVS503 – NOVEMBER 2003

ELECTRICAL CHARACTERISTICS (continued)

unless otherwise noted, minimum and maximum limits apply across the recommended operating junction temperature and

voltage range, V

TIMER = 0 V, and all outputs unloaded; typical specifications are at TJ = 25°C, VVCC = 48 V, VTIMER = 0 V, and

all outputs unloaded; positive currents are into pins.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

PG threshold voltage, VOUT falling, PG goes

VPGTH

VSENSE = VVCC, measure V(VCC-OUT)

2.2

2.7

3.2

low

∆V

PGT

PG threshold hysteresis voltage, V(SENSE-OUT)

VSENSE = VVCC

1.4

PG deglitch delay, detection to output, rising

tDPG

VSENSE = VVCC

and falling edges (2)

Leakage current, PG false, open drain

µA

OUTPUT VOLTAGE FEEDBACK INPUT (OUT)

VOUT = VVCC, VEN = Hi, sinking

µA

IOUT

Bias current

VOUT = GND, VEN = Lo, sourcing

µA

ENABLE INPUT (EN)

VEN_H

Threshold, VEN going high

1.32

1.35

1.38

VEN_L

Threshold, VEN going low

1.22

1.25

1.28

VEN hysteresis

(2)

100

Leakage current

VEN = 48 V

µA

INPUT SUPPLY UVLO (VCC)

VVCC turn on

Rising

8.4

8.8

VVCC turn off

Falling

7.5

8.3

Hysteresis(2)

(2)

Not tested in production.

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