LT1117 Datasheet, PDF (11/12 Pages) Linear Technology – 800mA Low Dropout Positive Regulators Adjustable and Fixed 2.85V, 3.3V, 5V

TYPICAL APPLICATI S
High Efficiency Regulator
LT1117/LT1117-2.85
LT1117-3.3/LT1117-5
28V INPUT
10k
1k
1mH
+
MR1122 10,000µF
28V
LT1117
IN
OUT
ADJ
470Ω
1N914
1M
LT1011
4N28
10k
10k
28V
1N914
240Ω
+
2k
OUTPUT
ADJUST
OUTPUT
100µF
LT1117 • TA15
SOLDERI G ETHODS
The SOT-223 is manufactured with gull wing leadform for
surface mount applications. The leads and heatsink are
solder plated and allow easy soldering using non-active or
mildly active fluxes. The package is constructed with three
leads exiting one side of the package and one heatsink
exiting the other side, and the die attached to the heatsink
internally.
The recommended methods of soldering SOT-223 are:
vapor phase reflow and infrared reflow with preheat of
component to within 65°C of the solder temperature.
Hand soldering and wave soldering are not recom-
mended since these methods can easily damage the
part with excessive thermal gradients across the pack-
age.
Care must be exercised during surface mount to minimize
large (> 30°C per second) thermal shock to the package.
LT1117 • TA18
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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