TPS40428 datasheet(9/92 Pages) TI

No. de pieza	TPS40428

Descripción Electrónicos	TPS40428 Dual Output, 2-Phase, Stackable PMBus??Synchronous Buck Driverless Controller with Adaptive Voltage Scaling (AVS) Bus

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Fabricante Electrónico	TI [Texas Instruments]

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TPS40428

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SLUSBV0A – MAY 2014 – REVISED JULY 2014

Electrical Characteristics (continued)

TJ = –40ºC to 125ºC, VIN = VVDD = 12 V, RRT valued to produce a switching frequency (fSW) of 500 kHz, all parameters at zero

power dissipation (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

PMBus ADDRESSING

IADD

Address pin bias current

8.775

9.75

10.725

µA

INITIALIZATION TIME

Initialization time after BP3 voltage is

tINI

1

ms

ready(14)

TEMPERATURE SENSE AND THERMAL SHUTDOWN

TSD

Junction shutdown temperature(14)

160

°C

THYST

Thermal shutdown hysteresis(14)

20

Ratio of bias current flowing out of TSNS

ITSNS(ratio)

Non-smart power mode

9.7

10

10.3

pin, state 2 to state 1

ITSNS(1)

State 1 current out of TSNS pin

Non-smart power mode

10

µA

ITSNS(2)

State 2 current out of TSNS pin

Non-smart power mode

100

µA

–40°C

≤ TSNS ≤ 125°C, Non-smart power

–4.5

4.5

mode

TSNS(acc)

External temperature sense accuracy(15)

°C

–40°C

≤ TSNS ≤ 125°C, Smart power mode

–3

3

Overtemperature fault limit(14)

Factory default settings

145

TOT(flt)

°C

OT fault limit range(14)

120

165

Overtemperature warning limit(14)

Factory default settings

125

TOT(warn)

°C

OT warning limit range(14)

100

140

TOT(step)

OT fault/warning step

1

°C

TOT(hys)

OT fault/warning hysteresis(14)

20

°C

(14) Specified by design. Not production tested.

(15) Performance verified under application conditions.

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