LM25019

SNVS952E – DECEMBER 2012 – REVISED NOVEMBER 2015

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6.5 Electrical Characteristics

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

6.25

7.6

8.55

V

(2)

26

mA

4.15

4.5

4.9

V

300

mV

2.3

V

Nonswitching, FB = 3 V

1.75

mA

UVLO = 0 V

50

225

µA

SWITCH CHARACTERISTICS

0.8

1.8

Ω

0.45

1

Ω

Gate Drive UVLO

2.4

3

3.6

V

Gate Drive UVLO Hysteresis

260

mV

CURRENT LIMIT

Current Limit Threshold

150

270

370

mA

Current Limit Response Time

Time to Switch Off

150

ns

Off-Time Generator (Test 1)

12

µs

Off-Time Generator (Test 2)

2.5

µs

REGULATION AND OVERVOLTAGE COMPARATORS

Internal Reference Trip Point for Switch

FB Regulation Level

1.2

1.225

1.25

V

ON

FB Overvoltage Threshold

Trip Point for Switch OFF

1.62

V

FB Bias Current

60

nA

UNDERVOLTAGE SENSING FUNCTION

UV Threshold

UV Rising

1.19

1.225

1.26

V

UV Hysteresis Input Current

UV = 2.5 V

–10

–20

–29

µA

Remote Shutdown Threshold

Voltage at UVLO Falling

0.32

0.66

V

Remote Shutdown Hysteresis

110

mV

THERMAL SHUTDOWN

Thermal Shutdown Temperature

165

°C

Thermal Shutdown Hysteresis

20

°C

(1)

All hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying

statistical process control.

(2)

6.6 Switching Characteristics

MIN

TYP

MAX

UNIT

ON-TIME GENERATOR

270

350

460

ns

188

250

336

ns

1880

3200

4425

ns

MINIMUM OFF-TIME

Minimum Off-Timer

FB = 0 V

144

ns

6

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