TPS56628_15 datasheet(4/24 Pages) TI

No de pièce	TPS56628

Description	4.5V to 18V Input, 6-A Synchronous Step-Down Converter with Eco-mode?

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Fabricant	TI [Texas Instruments]

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TPS56628

SLVSC94A – OCTOBER 2013 – REVISED DECEMBER 2013

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ELECTRICAL CHARACTERISTICS (continued)

over operating free-air temperature range, VIN = 12 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

THERMAL SHUTDOWN

Shutdown temperature (2)

165

TSDN

Thermal shutdown threshold

°C

Hysteresis (2)

35

ON-TIME TIMER CONTROL

tON

On time

VIN = 12 V, VO = 1.05 V

150

ns

tOFF(MIN)

Minimum off time

TA = 25°C, VFB = 0.7 V

260

310

ns

SOFT START

TSS

Soft-start time

Internal soft-start time

0.7

1.0

1.3

ms

POWER GOOD

VFB rising (Good)

85%

90%

95%

VTHPG

PG threshold

VFB falling (Fault)

85%

IPG

PG sink current

PG = 5 V

2

4

mA

HICCUP AND OVER-VOLTAGE PROTECTION

VOVP

Output OVP threshold

OVP Detect (L > H)

125%

VHICCUP

Output Hiccup threshold

Hiccup detect (H > L)

65%

THICCUPDELAY

Output Hiccup delay

To hiccup state

250

µs

THICCUPENDELAY

Output Hiccup Enable delay

Relative to soft-start time

x1.7

UVLO

Wake up VREG5 voltage

3.45

3.75

4.05

UVLO

UVLO threshold

V

Hysteresis VREG5 voltage

0.13

0.32

0.48

(2)

Not production tested.

4

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