LM3402HV datasheet(5/39 Pages) TI1

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LM3402, LM3402HV

www.ti.com

SNVS450F – SEPTEMBER 2006 – REVISED OCTOBER 2015

6.4 Thermal Information

LM3402, LM3402HV

THERMAL METRIC(1)

DDA (HSOP)

DGK (VSSOP)

UNIT

8 PINS

RθJA

Junction-to-ambient thermal resistance

45.6

154.4

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

53.1

48.2

°C/W

RθJB

Junction-to-board thermal resistance

25.8

74.2

°C/W

ψJT

Junction-to-top characterization parameter

7.6

4.3

°C/W

ψJB

Junction-to-board characterization parameter

25.7

72.9

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

3.2

N/A

°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

VIN = 24 V unless otherwise indicated. Typical values apply over –40°C ≤ TJ ≤ 125°C; minimum and maximum values apply

over the full operating temperature range

(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

REGULATION AND OVERVOLTAGE COMPARATORS

VREF-REG

CS Regulation Threshold

CS Decreasing, SW turns on

194

200

206

VREF-0V

CS Overvoltage Threshold

CS Increasing, SW turns off

300

ICS

CS Bias Current

CS = 0 V

0.1

µA

SHUTDOWN

VSD-TH

Shutdown Threshold

RON / SD Increasing

0.3

0.7

1.05

VSD-HYS

Shutdown Hysteresis

RON / SD Decreasing

OFF TIMER

tOFF-MIN

Minimum OFF-time

CS = 0 V

300

INTERNAL REGULATOR

VCC-REG

VCC Regulated Output

6.6

7.4

VIN-DO

VIN - VCC Dropout

ICC = 5 mA, 6 V < VIN < 8 V

300

VCC-BP-TH

VCC Bypass Threshold

VIN Increasing

8.8

VCC-BP-HYS

VCC Bypass Hysteresis

VIN Decreasing

225

VCC-Z-6

VIN = 6 V

VCC Output Impedance

VCC-Z-8

VIN = 8 V

(0 mA < ICC < 5 mA)

VCC-Z-24

VIN = 24 V

0.4

VCC-LIM

VCC Current Limit

(2)

VIN = 24 V, VCC = 0 V

VCC Undervoltage Lock-out

VCC-UV-TH

VCC Increasing

5.25

Threshold

VCC Undervoltage Lock-out

VCC-UV-HYS

VCC Decreasing

150

Hysteresis

VCC Undervoltage Lock-out Filter

VCC-UV-DLY

100-mV Overdrive

µs

Delay

IIN-OP

IIN Operating Current

Non-switching, CS = 0 V

600

900

µA

IIN-SD

IIN Shutdown Current

RON / SD = 0 V

180

µA

CURRENT LIMIT

ILIM

Current Limit Threshold

530

735

940

DIM COMPARATOR

VIH

Logic High

DIM Increasing

2.2

VIL

Logic Low

DIM Decreasing

0.8

IDIM-PU

DIM Pullup Current

DIM = 1.5 V

µA

(1)

Typical specifications represent the most likely parametric norm at 25°C operation.

(2)

VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.

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