LM5145 datasheet(6/70 Pages) TI

6 / 70 page

Over the operating junction temperature range of –40

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

MIN

NOM

MAX

UNIT

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 the Electrical Characteristics.

7.4 Thermal Information

THERMAL METRIC(1)

UNIT

RGY (VQFN)

24 PINS

RθJA

Junction-to-ambient thermal resistance

37.3

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

°C/W

RθJB

Junction-to-board thermal resistance

15.5

°C/W

ψJT

Junction-to-top characterization parameter

1.2

°C/W

ψJB

Junction-to-board characterization parameter

15.5

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

5.6

°C/W

(1)

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

7.5 Electrical Characteristics

TJ = –40°C to 125°C. Typical values are at TJ = 25°C and VIN = 12 V (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY (VIN)

IQ-VIN1

VIN shutdown current

VEN = 0 V

2.3

3.8

µA

IQ-VIN2

VIN standby current

Non-switching, 0.5 V ≤ VEN ≤ 1 V

124

µA

ISLEEP1

Sleep current, 3.3 V

1.03 V ≤ VEN ≤ 80 V, VVOUT = 3.3

V, in regulation, no-load, not switching,

VPFM/SYNC = VDDA

9.5

19.7

µA

ISLEEP2

Sleep current, 5 V

1.03 V ≤ VEN ≤ 80 V, VVOUT = 5.0

V, in regulation, no-load, not switching,

VPFM/SYNC = VDDA

9.9

19.9

µA

ENABLE (EN)

VSDN

Shutdown to standby threshold

VEN rising

0.5

VEN-HIGH

Enable voltage rising threshold

VEN rising, enable switching

0.95

1.0

1.05

IEN-HYS

Enable hysteresis

VEN = 1.1 V

–12

–10

–8

µA

INTERNAL LDO (VCC)

VVCC-REG

VCC regulation voltage

IVCC = 0 mA to 100 mA

4.7

5.3

VVCC-UVLO

VCC UVLO rising threshold

3.3

3.4

3.5

VVCC-HYST

VCC UVLO hysteresis

148

IVCC-REG

Internal LDO short-circuit current limit

115

170

INTERNAL LDO (VDDA)

VVDDA-REG

VDDA regulation voltage

4.75

5.25

VVDDA-UVLO

VDDA UVLO rising

VVCC rising, VVCCX = 0 V

3.2

3.3

VVDDA-HYST

VDDA UVLO hysteresis

VVCCX = 0 V

120

RVDDA

VDDA resistance

VVCCX = 0 V

5.5

Ω

EXTERNAL BIAS (VCCX)

VVCCX-ON

VCCX rising threshold

4.1

4.3

4.4

VVCCX-HYST

VCCX hysteresis voltage

130

RVCCX

VCCX resistance

Ω

REFERENCE VOLTAGE

VREF

Regulated FB voltage

795

800

808

OUTPUT VOLTAGE (VOUT)

VOUT-3.3V-INT

3.3-V output voltage setpoint

RFB = 0 Ω, VIN = 3.8 V to 80 V, internal

compensation

3.267

3.3

3.33

LM5148

SNVSC01 – FEBRUARY 2023

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