5

LM5007

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SNVS252H – SEPTEMBER 2003 – REVISED NOVEMBER 2018

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Copyright © 2003–2018, 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.

(2)

The VCC output is intended as a self bias for the internal gate drive power and control circuits. Device thermal limitations limit external

loading.

(3)

For devices in the WSON-8 package, the MOSFET RDS(on) limits are specified by design characterization data only.

6.5 Electrical Characteristics

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

(1).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

STARTUP REGULATOR

VCC

VCC Regulator Output

6.6

7

7.4

V

IVCC-CL

VCC Current Limit

(2)

11

mA

VCC SUPPLY

VCC-UVLO

VCC Undervoltage Lockout Voltage

(VCC increasing)

6.3

V

VCC-UVLO-HYS VCC Undervoltage Hysteresis

206

mV

tVCC-UV-DELAY VCC UVLO Delay (filter)

3

µs

ICC-OPER

ICC Operating Current

Not switching, VFB = 3 V

500

675

µA

ISHD

Shutdown/Standby Current

VRON = 0 V

100

200

µA

SWITCH CHARACTERISTICS

RDS(on)1

Buck Switch On-State Resistance

ISW = 0.2 A,

VBST – VSW = 6.3 V

(3)

0.74

1.34

Ω

VGATE-UV

Gate Drive UVLO (VBST – VSW)

Rising

3.4

4.5

5.5

V

VGATE-UV-HYS Gate Drive UVLO Hysteresis

400

mV

VDS((max)

Breakdown Voltage,

VIN to RTN

TJ = 25°C

80

V

TJ = –40°C to 125°C

76

V

VBST-VCC(max)

Breakdown voltage,

BST to VCC

TJ = 25°C

80

V

TJ = –40°C to 125°C

76

V

CURRENT LIMIT

ICL

Current Limit Threshold

535

725

900

mA

tCL-RESP

Current Limit Response Time

ISW overdrive = 0.1 A, time to switch off

225

ns

tCL-OFF1

OFF-Time Generator (test 1)

VFB = 0 V, RCL = 100 kΩ

17

µs

tCL-OFF2

OFF-Time Generator (test 2)

VFB = 2.3 V, RCL = 100 kΩ

2.65

µs

ON-TIME GENERATOR

tON1

TON-1

VIN = 10 V, RON = 200 kΩ

2.15

2.77

3.5

µs

tON2

TON-2

VIN = 75 V, RON = 200 kΩ

290

390

490

ns

VSHD

Remote Shutdown Threshold

Rising

0.45

0.7

1.1

V

VSHD-HYS

Remote Shutdown Hysteresis

40

mV

MINIMUM OFF-TIME

tOFF(min)

Minimum Off-Timer

VFB = 0 V

300

ns

REGULATION AND OV COMPARATORS

VREF

FB Reference Threshold

Internal reference, trip point for switch ON

2.445

2.5

2.550

V

VOV-REF

FB Overvoltage Threshold

Trip point for switch OFF

2.875

V

IFB

FB Bias Current

100

nA

THERMAL SHUTDOWN

TSHD

Thermal Shutdown Temperature

165

°C

THYS

Thermal Shutdown Hysteresis

25

°C