TPS51427_1 datasheet(8/41 Pages) TI

Part #	TPS51427

Description	DUAL D-CATM SYNCHRONOUS STEP-DOWN CONTROLLER FOR NOTEBOOK POWER RAILS

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Manufacturer	TI [Texas Instruments]

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TPS51427

SLUS819B – APRIL 2008 – REVISED SEPTEMBER 2008................................................................................................................................................ www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

Over recommended free-air temperature range, VV5DRV = 5 V, VVIN = 12 V (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUTS AND OUTPUTS

High level

2.9

TONSEL Input Logic Levels

Float level

1.85

2.25

V

Low level

0.45

High threshold (PWM Only)

2.9

SKIPSEL Input Logic Levels

Float level (OOA)

1.85

2.25

V

Low level (Auto Skip)

0.45

SKIPSEL, TONSEL Input Current

SKIPSEL = TONSEL = 0 V

2.5

4.0

5.5

µA

SMPS On level

2.9

EN1, EN2 Input Logic Levels

Delay start level

1.85

2.25

V

SMPS Off level

0.45

EN1, EN2 Leakage Current

EN1 = EN2 = 0 V

–0.1

0.1

µA

Rising edge

1.3

1.65

1.9

EN_LDO Input Logic Levels

V

Hysteresis

0.6

EN_LDO = 0 V

0.7

1.0

1.3

EN_LDO Input Current

µA

EN_LDO = 30 V

–0.1

0

0.1

8

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