If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Storage Temperature Range

−65˚C to +150˚C

Operating Junction Temperature

Range

−40˚C to +125˚C

Lead Temp. (Soldering, 5 seconds)

260˚C

ESD Rating

2 kV

Power Dissipation

(Note 2)

Internally Limited

Input Supply Voltage (Survival)

−0.3V to +26V

Input Supply Voltage (Operating)

+1.8V to +24V

Current Limit Pins (Survival)

−0.3V to +V

IN

Comp Pin (Survival)

−0.3V to +2V

Gate Pin (Survival)

−0.3V to +V

IN

ON/OFF Pin (Survival)

−0.3V to +20V

Feedback Pin (Survival)

−0.3V to +24V

Electrical Characteristics

Limits in standard typeface are for T

less otherwise specified; V

Symbol

Parameter

Conditions

Typ

LM2975AI-X.X

(Note 3)

LM2975I-X.X

(Note 3)

Units

Min

Max

Min

Max

V

REG

Regulation Voltage

(12V Versions)

12.0

11.820

12.180

11.700

12.300

V

(V

11.640

12.360

11.520

12.480

Regulation Voltage

(5V Versions)

5.0

4.925

5.075

4.875

5.125

(V

4.850

5.150

4.800

5.200

Regulation Voltage

(3.3V Versions)

3.3

3.250

3.350

3.217

3.383

(V

3.201

3.399

3.168

3.432

V

COMP

Comp Pin Voltage

V

1.240

1.215

1.265

1.203

1.277

V

1.209

1.271

1.196

1.284

I

Q

Quiescent Current

V

180

240

240

µA

320

320

V

0.01

11

V

CL

Current Limit

Sense Voltage

V

V

57

45

69

45

69

mV

39

72

39

72

V

ON/OFF

ON/OFF Threshold

Output = ON

0.94

1.10

1.10

V

1.20

1.20

Output = OFF

0.87

0.70

0.70

0.40

0.40

I

ON/OFF

ON/OFF

Input Bias Current

V

34

50

50

µA

75

75

I

G

Gate Drive Current (Sourcing)

V

V

3.5

1.3

1.3

mA

0.3

0.3

Gate Drive Current (Sinking)

V

V

1100

350

350

µA

40

40

V

G(MIN)

Gate Clamp Voltage

V

V

17

15

19

15

19

V

R(V

Resistance from

Gate to V

IN

V

V

500

k

Ω

Open Loop

Voltage Gain

V

0.5V

≤ V

5000

V/V

Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the de-

vice outside of its rated operating conditions.

Note 2: The LP2975 has internal thermal shutdown which activates at a die temperature of about 150˚C. It should be noted that the power dissipated within the

LP2975 is low enough that this protection circuit should never activate due to self-heating, even at elevated ambient temperatures.

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