TPS40425_15 datasheet(10/95 Pages) TI

Part #	TPS40425

Description	TPS40425 Dual Output, 2-Phase, Stackable PMBus??Synchronous Buck Driverless Controller with Adaptive Voltage Scaling (AVS) Bus

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Manufacturer	TI [Texas Instruments]

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TPS40425

SLUSBO6A – JANUARY 2014 – REVISED JULY 2014

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Electrical Characteristics (continued)

TJ = –40ºC to 125ºC, VIN = VVDD = 12 V, RT set for 500 kHz, all parameters at zero power dissipation (unless otherwise

noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

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

µA/µA

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

125

TOT(flt)

°C

OT fault limit range(14)

120

165

Overtemperature warning limit(14)

Factory default settings

100

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 is verified under application conditions.

10

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