5

LM5008A

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SNVS583H – MARCH 2009 – REVISED OCTOBER 2018

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Copyright © 2009–2018, Texas Instruments Incorporated

(1)

All electrical characteristics having room temperature limits are tested during production with TA = TJ = 25°C. All hot and cold limits are

specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control.

6.5 Electrical Characteristics

TJ = 25°C and VIN = 48 V (unless otherwise noted)

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PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VCC SUPPLY

VCC Reg

VCC regulator output

VIN = 48 V

TJ = 25°C

7

V

TJ = –40°C to 125°C

6.6

7.4

VIN – VCC

6 V < VIN < 8.5 V

100

mV

VCC bypass threshold

VIN increasing

8.5

V

VCC bypass hysteresis

300

mV

VCC output impedance

VIN = 6 V

100

Ω

VIN = 10 V

8.8

Ω

VIN = 48 V

0.8

Ω

VCC current limit

VIN = 48 V

9.2

mA

VCC UVLO

VCC increasing

5.3

V

VCC UVLO hysteresis

190

mV

VCC UVLO filter delay

3

µs

IIN operating current

FB = 3 V, VIN = 48 V

TJ = 25°C

550

µA

TJ = –40°C to 125°C

750

IIN shutdown current

RT/SD = 0 V

TJ = 25°C

110

µA

TJ = –40°C to 125°C

176

CURRENT LIMIT

Current limit threshold

TJ = 25°C

0.51

A

TJ = –40°C to 125°C

0.41

0.61

Current limit response time

Iswitch overdrive = 0.1 A, time to switch off

350

ns

TOFF-1

Off-time generator

FB = 0 V, RCL = 100 kΩ

35

µs

TOFF-2

Off-time generator

FB = 2.3 V, RCL = 100 kΩ

2.56

µs

ON-TIME GENERATOR

TON – 1

VIN = 10 V, RON = 200 kΩ

TJ = 25°C

2.77

µs

TJ = –40°C to 125°C

2.15

3.5

TON – 2

VIN = 95 V, RON = 200 kΩ

TJ = 25°C

300

ns

TJ = –40°C to 125°C

200

420

Remote shutdown

threshold

Rising

TJ = 25°C

0.7

V

TJ = –40°C to 125°C

0.4

1.05

Remote shutdown

hysteresis

35

mV

MINIMUM OFF-TIME

Minimum off-timer

VFB = 0 V

300

ns

REGULATION AND OV COMPARATORS

FB reference threshold

Internal reference, trip point for

switch ON

TJ = 25°C

2.5

V

TJ = –40°C to 125°C

2.445

2.55

FB overvoltage threshold

Trip point for switch OFF

2.875

V

FB bias current

100

nA

THERMAL SHUTDOWN

Tsd

Thermal shutdown

temperature

165

°C

Thermal shutdown

hysteresis

25

°C