l4949eptr-e STMicroelectronics, l4949eptr-e Datasheet - Page 6

• Manufacturer Part Number: l4949eptr-e
• Description: Multifunction Very Low Drop Voltage Regulator
• Manufacturer: STMicroelectronics

Block diagram and pin description
6/19
Table 2.
SO-8
1
2
3
4
5
6
7
8
-
Pin N°
3, 8, 9, 13, 18
4, 5, 6, 7, 14,
15, 16, 17
SO-20
Pin definitions and functions
19
20
10
11
12
1
2
Symbol
V
GND
RES
NC
S
V
V
C
OUT
S
S
O
Z
T
I
Doc ID 16823 Rev 1
Input supply voltage. Block to GND via an external
capacitor (see
Sense input pin to supervise input voltage. Connect via an
external voltage divider connected to V
Preregulator output voltage. For details, see
Preregulator.
Reset pulse delay adjustment. Connecting this pin via a
capacitor to GND
Ground reference
Reset output. It is pulled down when the output voltage
goes below V
Sense output. This open collector pin must be connected to
V
the S
Output voltage. Block to GND via an external capacitor (see
Figure
Not connected pins
OUT
I
via an external resistor. It is pulled down whenever
voltage becomes lower than an internal voltage.
3)
RT
Figure
.
3).
Function
L4949ED-E, L4949EP-E
S
and to GND.
Section 3.4: