Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Voltages from the indicated pins to SGND/PGND:

VIN, ILIMx, KS3a, KS3b

−0.3V to 20V

SWx, RSNSx

−0.3V to (VIN +

0.3)V

FB1, FB2, FB3x, VDDx,ON/UVLO

−0.3V to 7V

COMPx, FAULT_DELAY, SSx

−0.3V to (VLIN5 +

0.3)V

CBOOT1 to SW1, CBOOT2 to SW2,

CBOOT3x to SW3x

−0.3V to 7V

LDRV1, LDRV2, LDRV3x

−0.3V to

(VDD+0.3)V

HDRV1 to SW1, HDRV2 to SW2,

HDRV3x to SW3x

−0.3V

HDRV1 to CBOOT1, HDRV2 to

CBOOT2, HDRV3x to CBOOT3x

0.3V

Power Dissipation (T

(Note 2)

1.3W

Ambient Storage Temperature

Range

−65˚C to +150˚C

Soldering Dwell Time, Temperature

(Note 3)

Infrared

Vapor Phase

10-20sec, 240˚C

75sec, 219˚C

ESD Rating (Note 4)

2kV

Operating Ratings(Note 1)

VIN (VIN and VLIN5 separate)

5.5V to 18V

VIN (VIN tied to VLIN5)

4.5V to 5.5V

Junction Temperature

0˚C to +125˚C

Electrical Characteristics

Unless otherwise specified, V

type apply over the full operating junction temperature range. Specifications appearing in plain type are measured using low

duty cycle pulse testing with T

Symbol

Parameter

Conditions

Min

Typ

Max

Units

System

∆V

Load Regulation

VIN = 12V, V

V

.04

%

∆V

Line Regulation

5.5V

≤ VIN ≤ 18V, V

.04

%

V

Feedback Voltage

5.5V

≤ VIN ≤ 18V

1.218

1.239

1.260

V

V

FB3

Feedback Voltage

5.5V

≤ VIN ≤ 18V

1.220

1.241

1.262

V

I

VIN

Input Supply Current

V

5.5V

≤ VIN ≤ 18V

1.66

2.2

mA

Standby

Shutdown (Note 7)

V

45

120

µA

VLIN5

VLIN5 Output Voltage

IVLIN5 = 0 to 50mA,

7V

≤ VIN ≤ 18V

4.65

5.0

5.35

V

Current Limit

V

Clos1, 2, 3

Current Limit

Comparator Offset

(V

0

mV

V

CLx1, 2, 3

Current Limit Sink

Current

R

18.2

20

21.8

µA

V

RILIM

ILIM Reference Voltage

1.238

V

Soft Start

I

ss1/2_SC

Soft-Start Source

Current

V

0.5

2.05

3.8

µA

I

ss3_SC

Soft-Start Source

Current

V

0.5

2.05

3.8

µA

I

ss1/2_SK

Soft-Start Sink Current

V

2

4.9

9

µA

I

ss3_SK

Soft-Start Sink Current

V

2

5.0

9

µA

I

SC_TD12-3

Delay Timer Source

Current

V

6.2

9.8

13.2

µA

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