L4973 datasheet(5/27 Pages) STMICROELECTRONICS

No. de pieza	L4973

Descripción Electrónicos	3.5A step down switching regulator

PDF	27 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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L4973

Electrical data

5/27

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

V2,V3

Output DC voltage

Output peak voltage at t = 0.1

µs f = 200KHz

-1

- 5

I2,I3

Maximum output current

int. limit.

V9-V8

V10-V8

V10

Bootstrap voltage

V11

V12

Analogs input voltage (

VCC = 24V)

V17

V19

Analogs input voltage (VCC = 24V)

V12

V13

(VCC = 20V)

-0.3

V18

V20

(VCC = 20V)

5.5

0.3

V10

V11

Inhibit

VCC

-0.3

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)

1.3

SO-20

Power dissipation a Tpins = 90°C

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

°C/W

RthJA

Maximum thermal resistance junction-ambient

60 (1)

Package mounted on board

80 (1)

°C/W

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