LM3940
LCC20
LCC4
1 AMP LOW
DROPOUT REGULATOR FOR
5V TO 3.3V CONVERSION
FEATURES
TO-204AA (TO-3)
TO-213AA (TO-66)
• OUTPUT VOLTAGE SPECIFIED OVER
TEMPERATURE RANGE
• EXCELLENT LOAD REGULATION
• GUARANTEED 1A OUTPUT CURRENT
• BUILT IN PROTECTION AGAINST EXCESS
TEMPERATURE
SMD05 (TO-276AA)
SMD1 (TO-276AB)
• SHORT CIRCUIT PROTECTED
TO-257AA
TO-258AA
The LM3940 is a 1A low dropout regulator
designed to provide 3.3V from a 5V supply. It is a
true low dropout regulator, it can hold its 3.3V
output in regulation with input voltages as low as
4.5V.
The regulator is available in a variety of
hermetically sealed packages and has the option
of being screened to both JAN and Space levels
LCC28
ABSOLUTE MAXIMUM RATINGS
1
(T
case
= 25°C unless otherwise stated)
V
I
V
O
I
O
P
D
T
J
T
STG
Maximum Input Supply Voltage
Nominal Output Voltage
Output Current
Power Dissipation
Operating Junction Temperature Range
Storage Temperature
7.5V
3.3V
1A
See Table
–40 to +125°C
–65 to 150°C
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
Document Number 5282
Issue 1