LM5145 datasheet(7/66 Pages) TI2

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7.3 Recommended Operating Conditions

Over the recommended operating junction temperature range of –40

℃ to 150℃ (unless otherwise noted). (1)

MIN

NOM

MAX

UNIT

Input voltage

VIN

5.5

100

–1

100

ILIM

100

External VCC bias rail

EN/UVLO

–0.3

100

Output

voltage

BST

–0.3

110

BST to VCC

100

BST to SW

PGOOD

ISINK, ISRC

Sink/source current SYNCOUT

–1

ISINK, ISRC

Sink/source current PGOOD

Operating junction temperature

–40

150

°C

(1)

Recommended Operation Conditions are conditions under which the device is intended to be functional. For specifications and test

conditions, see Electrical Characteristics.

7.4 Thermal Information

THERMAL METRIC(1)

LM5146

UNIT

RGY (VQFN)

20 PINS

RθJA

Junction-to-ambient thermal resistance

36.8

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

°C/W

RθJB

Junction-to-board thermal resistance

11.8

°C/W

ψJT

Junction-to-top characterization parameter

0.4

°C/W

ψJB

Junction-to-board characterization parameter

11.7

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

2.1

°C/W

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics

www.ti.com

LM5146

SNVSBV0A – JUNE 2021 – REVISED JUNE 2021

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