LP3986BL-3131 National Semiconductor, LP3986BL-3131 Datasheet - Page 11

• Manufacturer Part Number: LP3986BL-3131
• Description: Dual Micropower 150 mA Ultra Low-Dropout CMOS Voltage Regulators in micro SMD Package
• Manufacturer: National Semiconductor

Application Hints
MICRO SMD MOUNTING
The micro SMD package requires specific mounting tech-
niques which are detailed in National Semiconductor Appli-
cation Note (AN-1112). Referring to the section Surface
Mount Technology (SMT) Assembly Considerations.
For best results during assembly, alignment ordinals on the
PC board may be used to facilitate placement of the micro
SMD device.
MICRO SMD LIGHT SENSITIVITY
Exposing the micro SMD device to direct sunlight will cause
misoperation of the device. Light sources such as halogen
lamps can effect electrical performance if brought near to the
device.
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11
The wavelengths which have most detrimental effect are
reds and infra-reds, which means that the fluorescent light-
ing used inside most buildings has very little effect on per-
formance. A micro SMD test board was brought to within
1cm of a fluorescent desk lamp and the effect on the regu-
lated output voltage was negligible, showing a deviation of
less than 0.1% from nominal.
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