Block diagram and pin description

L4949ED-E, L4949EP-E

6/19

Doc ID 16823 Rev 1

Table 2.

Pin definitions and functions

Pin N°

Symbol

Function

SO-8

SO-20

119

Input supply voltage. Block to GND via an external

capacitor (see Figure 3).

220

Sense input pin to supervise input voltage. Connect via an

31

Preregulator output voltage. For details, see Section 3.4:

Preregulator.

42

Reset pulse delay adjustment. Connecting this pin via a

capacitor to GND

5

4, 5, 6, 7, 14,

15, 16, 17

GND

Ground reference

610

RES

Reset output. It is pulled down when the output voltage

711

Sense output. This open collector pin must be connected to

812

Output voltage. Block to GND via an external capacitor (see

Figure 3)

-

3, 8, 9, 13, 18

NC

Not connected pins