L4957A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L4957A' PDF : 7 Pages View PDF
L4957A
ABSOLUTE MAXIMUM RATINGS
Symbol
VIN
Ti
Tstg
Supply Input Voltage
Junction Temperature
Storage Temperature
Parameter
PINS CONNECTION
Value
Unit
16
V
-40 to +150
°C
-40 to +150
°C
3
OUT
2
GND
1
IN
D98IN838B
Versawatt (TO220)
3
OUT
2
GND
1
IN
D98IN933A
D2PAK
BLOCK DIAGRAM
VIN
10µF
IN
1
VREF
CURRENT
LIMIT
PRE
REGULATOR
+
E/A
-
CHARGE
PUMP
BUFFER
THERMAL
SHUTDOWN
POWER
DMOS
200mΩ
3
RX
OUT
VOUT
22µF
RY
2
GND
D00IN1108A
PIN FUNCTIONS
Pin N° Name
1
IN
2 GND
3 OUT
Function
Unregulated input voltage; this pin must be bypassed with a capacitor larger than 10µF.
To connect to Ground to get 1.5V, 1.8V, 2.5V or 3.3V output.
Regulated output voltage. A minimum bypass capacitor of 22µF is required to insure stability.
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