LM5145 datasheet(9/73 Pages) TI2

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6.3 Recommended Operating Conditions

Over the operating junction temperature range of –40°C to 150°C (unless otherwise noted). (1)

MIN

NOM

MAX

UNIT

VIN

Input supply voltage range

VOUT

Output voltage range

0.8

SW1, SW2 to PGND

–0.3

HO1 to SW1, HO2 to SW2

–0.3

VCBOOT1/2 + 0.3

CBOOT1 to SW1, CBOOT2 to SW2

–0.3

5.3

FB1, FB2 to AGND

–0.3

EN1, EN2, PG1, PG2 to AGND

–0.3

VIN

ISNS1+, ISNS2+, BIAS1/VOUT1, VOUT2 to AGND

–0.3

VCC, VDDA, RSS to PGND

–0.3

5.3

ISYNCOUT

SYNCOUT current

PGND to AGND

–0.3

0.3

Operating junction temperature

–40

150

°C

(1)

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

conditions, see Electrical Characteristics.

6.4 Thermal Information

THERMAL METRIC(1)

LM25137

UNIT

RHA (VQFN)

36 PINS

RθJA

Junction-to-ambient thermal resistance

33.2

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

24.2

°C/W

RθJB

Junction-to-board thermal resistance

14.1

°C/W

ψJT

Junction-to-top characterization parameter

0.4

°C/W

ψJB

Junction-to-board characterization parameter

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

3.6

°C/W

(1)

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

note.

6.5 Electrical Characteristics

Typical values are at TJ = 25°C. Minimum and maximum limits apply at TJ = –40°C to 150°C. VIN = 12V, unless otherwise

stated.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT SUPPLY (VIN)

IQ-SHDN

VIN shutdown current

VEN1 = VEN2 = 0V

3.6

µA

IQ-STBY

VIN standby current

0.6V < VEN1/2 < 1V

260

µA

IQ-SLEEP

VIN sleep current, VVOUT1 = 5V, VVOUT2 =

3.3V

1.05V ≤ VEN1/2 ≤ VIN, VVOUT1 = 5V, VVOUT2 =

3.3V, in regulation at no load, not switching,

VPFM/SYNC = 5V

1.5

µA

INTERNAL LDO (VCC)

VVCC-REG

VCC regulation voltage

IVCC = 0mA

4.8

5.0

5.2

VVCC-UVLO

VCC UVLO rising threshold

3.7

3.8

3.9

VVCC-UVLO-HYST

VCC UVLO hysteresis

300

IVCC-REG

VCC short-circuit current limit

175

300

INTERNAL LDO (VDDA)

VVDDA-REG

VDDA regulation voltage

RVDDA

VDDA resistance to VCC

Ω

EXTERNAL BIAS (BIAS1)

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LM25137

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