l4956 STMicroelectronics, l4956 Datasheet - Page 2

• Manufacturer Part Number: l4956
• Description: 5a Low Drop Linear Regulator
• Manufacturer: STMicroelectronics

L4956
ABSOLUTE MAXIMUM RATINGS
PIN CONNECTION (Top view)
PIN FUNCTIONS
BLOCK DIAGRAM
2/8
No.
V
V
1
2
3
4
5
6
7
SIG
PW
10 F
V
Symbol
PW
T
P
st
TOT
, V
Name
, T
GND
OUT
V
V
ADJ
INH
PG
PW
SIG
SIG
i
V
V
INH
SIG
PW
Unregulated power input voltage; this pin must be bypassed with a capacitor larger than 10 F.
Unregulated signal input voltage this pin has to be by passed with a minimum capacitor of 0.1 F.
TTL-CMOS input. A logic level on this input disable the device. An internal pull-down insures insures
full functionally even if the pin is open.
Ground.
The output is connected directly to this terminal for 1.26V operation via divider for higher voltages.
Open drain output, this pin is low when the output voltage is lower than 90%, otherwise is high.
Regulated output voltage. A minimum bypass capacitor of 22 F is required to insure stability.
1.26V
1
2
3
Supply Input Voltage
ADJ pin
PG and INH pins
Power Dissipation @ T
Power Dissipation @ T
Storage Temperature
ACTIVE HIGH
REGULATOR
INHIBIT
PRE
tab connected to pin 4
V
1.26V
REF
=
+
-
E/A
amb
case
LIMITATION
CURRENT
Parameter
= 50 C
= 90 C
FOLDBACK
0.9V
REF
Function
4
GND
7
6
5
4
3
2
1
+
-
BUFFER
D96IN373
SHUTDOWN
THERMAL
CHARGE
PUMP
6
PG
OUT
PG
ADJ
GND
INH
V
V
SIG
PW
POWER
-40 to +150
150m
DMOS
D96IN372A
0 to V
-0.3 to 4
Value
15
7
5
7
2
SIG
OUT
ADJ
R1
R2
22 F
Unit
W
W
V
V
V
V
C
OUT