TPS40400_15 datasheet(9/82 Pages) TI

No de pièce	TPS40400

Description	TPS40400 3-V to 20-V PMBus Synchronous Buck Controller

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Fabricant	TI [Texas Instruments]

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TPS40400

www.ti.com

SLUS930C – APRIL 2011 – REVISED OCTOBER 2015

6.6 Switching Characteristics

over operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

(VBOOT – VSW) = 6.4 V,

RHDHI

High-side driver pullup resistance

1.25

2.5

Ω

IHDRV = –100 mA, TJ = 25°C

(VBOOT – VSW) = 6.4 V,

RHDLO

High-side driver pulldown resistance

1.3

2.6

Ω

IHDRV = 100 mA, TJ = 25°C

RLDHI

Low-side driver pullup resistance

TJ = 25°C

1.25

2.5

Ω

RLDLO

Low-side driver pulldown resistance

TJ = 25°C

0.8

1.5

Ω

tHRISE

High-side driver rise time(1)

CLOAD = 2.2 nF

6

12.1

ns

tHFALL

High-side driver fall time(1)

CLOAD = 2.2 nF

6.3

12.6

ns

tLRISE

Low-side driver rise time(1)

CLOAD = 2.2 nF

6

12.1

ns

tLFALL

Low-side driver fall time(1)

CLOAD = 2.2 nF

4

8

ns

MFR_SPECIFIC_00 bit 0 = 0,

tDT

Anti-cross conduction time

20

50

ns

(short dead time.)

ISW

SW pin leakage current (out of pin)

VSW = 0 V

1

µA

(1)

Specified by Design. Not production tested.

6.7 Dissipation Ratings

(1)

THERMAL IMPEDANCE

TA = 25°C

TA = 85°C

PACKAGE

JUNCTION-TO-AMBIENT

AIRFLOW

POWER RATING

(°C/W)

(W)

31.1

Natural Convection

3.21

1.29

24-Pin Plastic

25.2

200 LFM

3.96

1.58

QFN (RHL)

23

400 LFM

4.36

1.74

(1)

Ratings based on JEDEC High Thermal Conductivity (High K) Board. For more information on the test method, see TI Technical Brief

SZZA017.

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