DESCRIPTION
The LM1117 is a series of low dropout voltage regulators with a
dropout of 1.2V at 800mA of load current. It has
the same pin-out as National Semiconductor's industry standard
LM317.
The LM1117 is available in an adjustable version, which can set the
output voltage from 1.25V to 13.8V with only
two external resistors. In addition, it is also available in five
fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V.
The LM1117 offers current limiting and thermal shutdown. Its
circuit includes a zener trimmed bandgap reference
to assure output voltage accuracy to within ±1%.
The LM1117 series is available in LLP, TO-263, SOT-223, TO-220, and
TO-252 D-PAK packages. A minimum of
10µF tantalum capacitor is required at the output to improve the
transient response and stability.
ABSOLUTE MAXIMUM RATINGS(1)
(1) Absolute Maximum Ratings indicate limits beyond which damage to
the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific
performance is not guaranteed. For guaranteed specifications and
the test
conditions, see the Electrical Characteristics.
(2) The maximum power dissipation is a function of TJ(max) , θJA,
and TA. The maximum allowable power dissipation at any ambient
temperature is PD = (TJ(max)–TA)/θJA. All numbers apply for
packages soldered directly into a PC board.
(3) For testing purposes, ESD was applied using human body model,
1.5kΩ in series with 100pF.
OPERATING RATINGS(1)
(1) Absolute Maximum Ratings indicate limits beyond which damage to
the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific
performance is not guaranteed. For guaranteed specifications and
the test
conditions, see the Electrical Characteristics.
(2) The maximum power dissipation is a function of TJ(max) , θJA,
and TA. The maximum allowable power dissipation at any ambient
temperature is PD = (TJ(max)–TA)/θJA. All numbers apply for
packages soldered directly into a PC board.
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