LM25018

SNVS953 – DECEMBER 2012

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Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

6.25

7.6

8.55

V

(2)

26

mA

4.15

4.5

4.9

V

300

mV

2.3

V

Non-Switching, FB = 3V

1.75

mA

UVLO = 0V

50

225

µA

Switch Characteristics

0.8

1.8

Ω

7V

0.45

1

Ω

Gate Drive UVLO

2.4

3

3.6

V

Gate Drive UVLO Hysteresis

260

mV

Current Limit

Current Limit Threshold

390

575

750

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

On-Time Generator

270

350

460

ns

188

250

336

ns

1880

3200

4425

ns

Minimum Off-Time

Minimum Off-Timer

FB = 0V

144

ns

Regulation and Overvoltage Comparators

FB Regulation Level

Internal reference trip point

1.2

1.225

1.25

V

for switch 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 = 2.5V

-10

-20

–29

µA

Remote Shutdown Threshold

Voltage at UVLO Falling

0.32

0.66

V

Remote Shutdown Hysteresis

110

mV

Thermal Shutdown

Tsd

Thermal Shutdown Temp.

165

°C

Thermal Shutdown Hysteresis

20

°C

Thermal Resistance

Junction to Ambient

PSOP-8

40

°C/W

LLP-8

40

°C/W

(1)

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

(2)

4

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