3/13

L4978

(*) Pins 1, 7, 8, 9, 10, 15 and 16 are not internally, electrically connected to the die.

Table 4. Thermal Data

(*) Package mounted on board.

Table 5. Absolute Maximum Ratings

4

5, 6

OUT

Stepdown regulator output

5

11

Unregulated DC input voltage

6

12

BOOT

A capacitor connected between this pin and OUT allows to drive the internal DMOS

Transistors

7

13

COMP

E/A output to be used for frequency compensation

8

14

FB

Stepdown feedback input. Connecting directly to this pin results in an output voltage

of 3.3V. An external resistive divider is required for higher output voltages.

Symbol

Parameter

Minidip

SO16

Unit

Thermal Resistance Junction to ambient

Max.

90 (*)

110 (*)

°C/W

Symbol

Parameter

Value

Unit

Minidip

S016

Input voltage

58

V

Output DC voltage

Output peak voltage at t = 0.1ms f=200KHz

-1

-5

V

V

Maximum output current

int. limit.

14

V

Bootstrap voltage

70

V

12

V

13

V

(VCC= 20V)

6

-0.3

V

V

Power dissipation a Tamb

≤ 60°C

DIP-8

SO16

1

0.8

W

W

Junction and storage temperature

-40 to 150

°C

Table 3. Pin Description (continued)

N°

Pin

Name

Function