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 to AGND

-0.3 to 75V

SW1, SW2 to AGND

-3.0 to 75V

HB1 to SW1, HB2 to SW2

-0.3 to 15V

VCC1, VCC2 to AGND

(Note 2)

-0.3 to 15V

FB1, FB2, DEMB, RES,

VCCDIS, UVLO to AGND

-0.3 to 15V

HO1 to SW1, HO2 to SW2

-0.3 to HB+0.3V

LO1, LO2 to AGND

-0.3 to VCC+0.3V

SS1, SS2 to AGND

-0.3 to 7V

EN2, RT to AGND

-0.3 to 7V

CS1, CS2, CSG1, CSG2 to

AGND

-0.3V to 0.3V

PGND to AGND

-0.3V to 0.3V

ESD Rating HBM (Note 3)

2kV

Storage Temperature

-55°C to +150°C

Junction Temperature

+150°C

Operating Ratings (Note 1)

VIN

5.5V to 65V

VCC

5.5V to 14V

HB to SW

5.5V to 14V

Junction Temperature

-40°C to +125°C

Note: COMP1, COMP2, RAMP1, and RAMP2 are output pins. As such they

are not specified to have an external voltage applied.

junction temperature range of -40°C to +125°C. Unless otherwise specified, the following conditions apply: VIN = 36V, VCC = 8V,

VCCDIS = 0V, EN2 = 5V, R

(Note 4) and (Note 5).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VIN Supply

I

BIAS

VIN Operating Current

SS1 = SS2 = 0V

6

7.3

mA

VCCDIS = 2V, SS1 = SS2 = 0V

400

550

µA

I

VCC

VCC1 Operating Current

VCCDIS = 2V, SS1 = SS2 = 0V

3.9

4.5

mA

VCC2 Operating Current

VCCDIS = 2V, SS1 = SS2 = 0V

1.4

2.0

mA

I

SHUTDOWN

VIN Shutdown Current

UVLO = 0V, SS1 = SS2 = 0V

18

50

µA

VCC Regulator (Note 6)

V

CC(REG)

VCC Regulation

6.77

7.6

8.34

V

VCC Regulation

VIN = 6V, No external load

5.9

5.95

V

VCC Sourcing Current Limit

VCC = 0V

25

40

mA

VCCDIS Switch Threshold

VCCDIS Rising

1.19

1.25

1.29

V

VCCDIS Switch Hysteresis

0.07

V

VCCDIS Input Current

VCCDIS = 0V

-20

nA

VCC Under-voltage Threshold

Positive going VCC

4.7

4.9

5.2

V

VCC Under-voltage Hysteresis

0.2

V

EN2 Input

V

IL

EN2 Input Low Threshold

2.0

1.5

V

V

IH

EN2 Input High Threshold

2.9

2.5

V

EN2 Input pull-up resistor

50

k

Ω

UVLO

UVLO Threshold

UVLO Rising

1.20

1.25

1.29

V

UVLO Hysterisis Current

UVLO = 1.4V

15

20

25

µA

UVLO Shutdown Threshold

0.4

V

UVLO Shutdown Hysterisis Voltage

0.1

V

Soft Start

SS Current Source

SS = 0V

7

10

13

µA

SS Pull Down R

DSON

10

Ω

5

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