LM4050-N-Q1 Pin3

K.Hamamoto

Guru 12155 points

On the datasheet, it is mentioned as the following,

" This pin must be left floating or connected to pin 2."

Why is it? Is that possible to connect pin 1?

Regards,

Koji Hamamoto

over 9 years ago

0 Christopher Dean over 9 years ago

TI__Intellectual 1745 points

Hi Koji,

The reason is not mentioned in the datasheet but Pin 3 can only be floating or connected to pin 2. Pin 3 should not be connected to pin 1.

Chris

0 Donald Jones over 9 years ago

TI__Mastermind 22610 points

For the SOT-23/DBZ/3-pin package, pin 3 is mechanically, and electrically, attached to the die substrate. Connecting the die substrate to pin1 (Cathode, V+) will not allow proper operation, and may damage the device.

To repeat : Pin 3 should not be connected to pin 1.

Power management

Power management forum

LM4050-N-Q1 Pin3