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

EN Voltage (Note 3)

−0.3V to 6V

Maximum Junction Temp.

150˚C

Power Dissipation, T

(Note 2)

417mW

ESD Susceptibilty (Note 4)

Human Body Model

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 Range (V

4.5V to 35V

EN Voltage (max.) (Note 3)

5.5V

Operating Junction Temperature

(T

−40˚C to +125˚C

Electrical Characteristics (Note 5), (Note 6) Specifications in Standard type face are for T

bold type face apply over the full Operating Temperature Range (T

12V, V

tistical analysis.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

I

SHDN

Shutdown input supply current

EN = 0V

7

15

µA

V

EN

Enable threshold voltage

Enable rising

1.15

1.5

1.85

V

V

EN_HYST

Enable threshold hysteresis

130

mV

I

Q

Quiescent Current at ground pin

FB = 1.5V (Not Switching)

280

400

µA

V

FB

(Note 7)

Feedback Voltage

1.223

1.214

1.239

1.255

1.264

V

V

HYST

Comparator Hysteresis

10

14

15

20

mV

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

0.44

A

Sink

VIN = 7V, PGATE = 3.5V

0.1

I

FB

(Note 9)

FB pin Bias Current

V

300

750

nA

T

ONMIN_NOR

Minimum on time in normal

operation

V

Cload on OUT = 1000pF (Note 10)

100

ns

T

ONMIN_CL

Minimum on time in current limit

V

VFB = 1.0V

Cload on OUT = 1000pF (Note 10)

200

ns

%V

∆V

IN

Feedback Voltage Line Regulation

4.5

≤ V

IN

≤ 35V

0.01

%/V

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