TPS53511_15 datasheet(5/24 Pages) TI

No. de pieza	TPS53511

Descripción Electrónicos	4.5-V to 18-V Input, 1.5-A Step-Down Regulator with Integrated Switcher

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Fabricante Electrónico	TI [Texas Instruments]

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TPS53511

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SLUSBG4A – MARCH 2013 – REVISED JANUARY 2014

ELECTRICAL CHARACTERISTICS (continued)

over recommended free-air temperature range, VVIN = 12 V, PGND = GND (unless otherwise noted).

()

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ON-TIME TIMER CONTROL

tON

On time

VVIN = 12 V, VOUT = 1.05 V

145

ns

tOFF(min)

Minimum off time

TA = 25°C, VVFB = 0.7 V

260

310

ns

SOFT-START FUNCTION

ISSC

Soft-start charge current

VSS = 0 V

1.4

2.0

2.6

µA

ISSD

Soft-start discharge current

VSS = 0.5 V

0.1

0.2

mA

POWER GOOD

VVFB rising (good)

85%

90%

95%

VTHPG(UV)

Power good undervoltage threshold

VVFB falling (fault)

85%

VVFB rising (fault)

110%

115%

120%

VTHPG(OV)

Power good overvoltage threshold

VVFB falling (good)

110%

IPG

Sink current

VPG = 0.5 V

2.5

5.0

mA

OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION

VOVP

Output OVP trip threshold

OVP detect

110%

115%

120%

tOVPDEL

Output OVP propagation delay

5

µs

UVP detect

65%

70%

75%

VUVP

Output UVP trip threshold

Hysteresis

10%

tUVPDEL

Output UVP delay

0.25

ms

tUVPEN

Output UVP enable delay

Relative to soft-start time

tSS×1.7

UNDERVOLTAGE LOCKOUT

Wake-up VREG5 voltage threshold

3.55

3.80

4.05

UVLO

V

Hysteresis VREG5 voltage threshold

0.23

0.35

0.47

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