LM3940 Datasheet, PDF (1/4 Pages) National Semiconductor (TI) – 1A Low Dropout Regulator for 5V to 3.3V Conversion

LM3940
LCC20
1 AMP LOW
DROPOUT REGULATOR FOR
LCC4
5V TO 3.3V CONVERSION
TO-204AA (TO-3)
SMD05 (TO-276AA)
TO-213AA (TO-66)
SMD1 (TO-276AB)
FEATURES
• OUTPUT VOLTAGE SPECIFIED OVER
TEMPERATURE RANGE
• EXCELLENT LOAD REGULATION
• GUARANTEED 1A OUTPUT CURRENT
• BUILT IN PROTECTION AGAINST EXCESS
TEMPERATURE
• SHORT CIRCUIT PROTECTED
TO-257AA
TO-258AA
LCC28
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
ABSOLUTE MAXIMUM RATINGS¹ (T_case = 25°C unless otherwise stated)
V_I
Maximum Input Supply Voltage
7.5V
V_O
Nominal Output Voltage
3.3V
I_O
Output Current
1A
P_D
Power Dissipation
See Table
T_J
Operating Junction Temperature Range
–40 to +125°C
T_STG
Storage Temperature
–65 to 150°C
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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.
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Document Number 5282
Issue 1