Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

VIN Voltage

−0.3V to 36V

PGATE Voltage

−0.3V to 36V

FB Voltage

−0.3V to 5V

ISENSE Voltage

−1.0V to 36V

ADJ Voltage

−0.3V to 36V

Maximum Junction Temp.

150˚C

Power Dissipation

25˚C

ESD Susceptibilty

Human Body Model (Note 3)

2kV

Lead Temperature

Vapor Phase (60 sec.)

Infared (15 sec.)

215˚C

220˚C

Storage Temperature

−65˚C to 150˚C

Operating Ratings (Note 1)

Supply Voltage

4.5V to 35V

Operating Junction

Temperature

−40˚C to +125˚C

Electrical Characteristics

Specifications in Standard type face are for T

Range (T

min/max specification limits are guaranteed by design, test, or statistical analysis.

Symbol

Parameter

Conditions

Min

(Note 4)

Typ

(Note 5)

Max

(Note 4)

Unit

I

Q

Quiescent Current at

ground pin

FB = 1.5V

(Not Switching)

250

400

µA

V

FB

Feedback Voltage

(Note 6)

1.226

1.217

1.242

1.258

1.267

V

V

HYST

Comparator

Hysteresis

10

14

15

20

mV

V

CL(Note 7)

Current limit

comparator trip

voltage

R

110

mV

R

880

V

CL_OFFSET

Current limit

comparator offset

V

−20

0

+20

mV

I

CL_ADJ

Current limit ADJ

current source

V

3.0

5.5

7.0

µA

T

CL

Current limit one shot

off time

V

V

V

6

9

14

µs

R

PGATE

Driver resistance

Source

I

5.5

Ω

Sink

I

8.5

I

PGATE

Driver Output current

Source

V

P

0.44

A

Sink

V

P

0.32

V

PGATEMIN

Minimum driver

voltage

V

V

I

1.2

V

I

FB

FB pin Bias Current

(Note 8)

V

300

750

nA

T

ONMIN_NOR

Minimum on time in

normal operation

V

C

1000pF

(Note 9)

100

ns

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