6.4 Thermal Information

THERMAL METRIC(1)

LM74502

LM74502H

UNIT

DDF (SOT)

8 PINS

RθJA

Junction-to-ambient thermal resistance

133.8

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

72.6

°C/W

RθJB

Junction-to-board thermal resistance

54.5

°C/W

ΨJT

Junction-to-top characterization parameter

4.6

°C/W

ΨJB

Junction-to-board characterization parameter

54.2

°C/W

(1)

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

report, SPRA953.

6.5 Electrical Characteristics

TJ = –40°C to +125°C; typical values at TJ = 25°C, V(VS) = 12 V, C(VCAP) = 0.1 µF, V(EN/UVLO) = 3.3 V, over operating free-air

temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VS SUPPLY VOLTAGE

V(VS)

Operating input voltage

4

60

V

V (VS_POR)

VS POR Rising threshold

3.9

V

VS POR Falling threshold

2.2

2.8

3.1

V

V(VS POR(Hys))

VS POR Hysteresis

0.44

0.67

V

I(SHDN)

Shutdown Supply Current

V(EN/UVLO) = 0 V

0.9

1.5

µA

I(Q)

Operating Quiescent Current

IGND

45

65

µA

I(REV)

VS pin leakage current during input

reverse polarity

0 V ≤ V(VS) ≤ – 65 V

100

150

µA

ENABLE INPUT

V(EN_UVLOF)

Enable/UVLO falling threshold

1.027

1.14

1.235

V

V(EN_UVLOR)

Enable/UVLO rising threshold

1.16

1.24

1.32

V(ENF)

Enable threshold voltage for low IQ

shutdown

0.32

0.64

0.94

V

V(EN_Hys)

Enable Hysteresis

38

90

132

mV

I(EN/UVLO)

Enable sink current

V(EN/UVLO) = 12 V

3

5

µA

GATE DRIVE

I(GATE)

Peak source current

V(GATE) – V(SRC) = 5 V

40

60

77

µA

I(GATE)

Peak source current

V(GATE) – V(SRC) = 5 V, LM74502H

3

11

mA

Peak sink current

EN= High to Low

V(GATE) – V(SRC) = 5 V

2370

mA

RDSON

discharge switch RDSON

EN = High to Low

V(GATE) – V(SRC) = 100 mV

0.4

2

Ω

CHARGE PUMP

I(VCAP)

Charge Pump source current (Charge

pump on)

V(VCAP) – V(VS) = 7 V

162

300

600

µA

Charge Pump sink current (Charge

pump off)

V(VCAP) – V(VS) = 14 V

5

10

µA

V(VCAP) – V(VS)

Charge pump voltage at V(VS) = 3.2 V I(VCAP) ≤ 30 µA

8

V

V(VCAP) – V(VS)

Charge pump turn on voltage

10.3

11.6

13

V

V(VCAP) – V(VS)

Charge pump turn off voltage

11

12.4

13.9

V

V(VCAP) – V(VS)

Charge Pump Enable comparator

Hysteresis

0.45

0.8

1.25

V

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LM74502, LM74502H

SNOSDE5A – DECEMBER 2021 – REVISED MAY 2022

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