Application Info

1.0 Mounting

To ensure that the geometry of the micro SMD package

maintains good physical contact with the printed circuit

board, pin A1 (NC) must be soldered to the pcb. Please see

AN-1112 for more detailed information regarding board

mounting techniques for the micro SMD package.

2.0 LM431 micro SMD Light Sensitivity

When the LM431 micro SMD package is exposed to bright

sunlight, normal office fluorescent light, and other LED’s and

lasers, it operates within the guaranteed limits specified in

the electrical characteristics table.

Delay Timer

DS010055-22

Current Limiter or Current Source

DS010055-23

Constant Current Sink

DS010055-24

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