L4973D5.1-013TR datasheet(5/27 Pages) STMICROELECTRONICS

Part #	L4973D5.1-013TR

Description	3.5A step down switching regulator

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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L4973

Electrical data

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3

Electrical data

3.1

Maximum ratings

3.2

Thermal data

Table 2. Absolute maximum ratings

Symbol

Parameter

Value

Unit

DIP-18

S0-20

V7,V8

V9,V8

Input voltage

58

V

V2,V3

Output DC voltage

Output peak voltage at t = 0.1

µs f = 200KHz

-1

- 5

V

I2,I3

Maximum output current

int. limit.

V9-V8

V10-V8

14

V

V9

V10

Bootstrap voltage

70

V

V11

V12

Analogs input voltage (

VCC = 24V)

12

V

V17

V19

Analogs input voltage (VCC = 24V)

13

V

V12

V13

(VCC = 20V)

6

-0.3

V

V18

V20

(VCC = 20V)

5.5

0.3

V

V10

V11

Inhibit

VCC

-0.3

V

Ptot

DIP 12+3+3

Power dissipation a Tpins

≤ 90°C

(TA = 70°C no copper area)

(TA = 70°C 4cm copper area on PCB)

5

1.3

2

W

SO-20

Power dissipation a Tpins = 90°C

4W

TJ,TSTG

Junction and storage temperature

-40 to 150

°C

Table 3. Thermal data

Symbol

Parameter

DIP-18

SO-20

Unit

RthJP

Maximum thermal resistance junction-pin

12

15

°C/W

RthJA

Maximum thermal resistance junction-ambient

60 (1)

1.

Package mounted on board

80 (1)

°C/W

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