LM5070 datasheet(4/17 Pages) NSC

4 / 17 page

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

IN ,RTN to VEE

-0.3V to 80V

RSIG to V

-12V to 0V

UVLO to V

-0.3V to 57V

UVLORTN

-0.3V to 13V

RCLASS, RCLP to V

-0.3V to 7V

ARTN to RTN

-0.3V to 0.3V

CC, OUT to ARTN

-0.3V to 16V

All other inputs to ARTN

-0.3V to 7V

ESD Rating

Human Body Model

2000V

Storage Temperature

-65˚C to +150˚C

Junction Temperature

150˚C

Lead Temperature (Note 2)

Wave (4 seconds)

Infrared (10 seconds)

Vapor Phase (75 seconds)

260˚C

240˚C

219˚C

Operating Ratings

IN voltage

1.8V to 75V

External voltage applied to V

8.1V to 15V

Operating Junction Temperature

-40˚C to +125˚C

Electrical Characteristics (Note 3)

Specifications in standard type face are for T

J= +25˚C and those in boldface type apply over the full operating junction tem-

perature range. Unless otherwise specified: V

IN = 48V, VCC = 10V, RT = 30.3k

Ω.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Powered Interface

IOS

Offset Current

IN < 10.0V

VCLSS(ON)

Signature Resistor Disable /

Classification Current Turn On

IN with respect to VEE

10.0

11.5

12.5

VCLSS(OFF) Classification Current Turn Off

IN with respect to VEE

20.5

22.0

23.0

Classification Voltage

With respect to V

1.43

1.5

1.57

ICLASS

Supply Current During

Classification

IN =17V

0.5

1.5

IDC

Supply Current During Normal

Operation

OUT floating

1.9

UVLO Pin Reference Voltage

IN > 12V

1.95

2.00

2.05

UVLO Hysteresis Current

IN > UVLO

8.0

11.5

Softstart Release

RTN falling with respect

to V

1.2

1.45

1.7

Softstart Release Hysteresis

RTN rising with respect

to V

0.8

1.1

1.3

RDS(ON)

PowerFET Resistance

I = 350mA,

IN = 48V

2.2

Ω

ILEAK

SMPS Bias Current

EE = 0V, VIN = RTN =

57V

100

ILIM

Default Current Limit

EE = 0V, RTN = 3.0V,

Temp = 0˚C to 85˚C

350

390

420

ILIM

Default Current Limit

EE = 0V, RTN = 3.0V,

Temp = -40˚C to 125˚C

325

390

420

Current Limit Programming

Accuracy

EE = 0V, RTN = 3.0V,

RCLP = 80.6k

Ω

-20

+20

Startup Regulator

VccReg

CC Regulation

Open ckt

7.5

7.8

8.1

CC Current Limit

(Note 4)

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