LM46002: BIAS

Seishin

Genius 4135 points

Part Number: LM46002

Hi,

My customer connects BIAS to ground even when Vout> 3.3 V.(Iout=0-500mA,-40 to +125℃）

Does it cause damage to the device or performance deterioration?

Best regards,
Seishin

over 7 years ago

0 Samuel Jaffe over 7 years ago

TI__Mastermind 25590 points

Seishin,

Section 6 of the datasheet states, Bias: "... Tie to ground when not in use."

If VOUT is between 3.3V and 28V, you can tie Bias to VOUT to get higher efficiency (the internal LDO will take power from VOUT (instead of VIN) which will be lower than VIN. This means a smaller voltage drop across the LDO and a higher efficiency overall). But tying Bias to GND will not cause damage or deterioration.

-Sam

0 YangZhang over 7 years ago

TI__Genius 11085 points

No, it will not damage the part. It is a valid configuration. The efficiency at light load will be lower than Bias tied to Vout.

0 Seishin over 7 years ago in reply to YangZhang

Genius 4135 points

Hi Samuel and YangZhang,

Thank you for your reply.

I understand it.

Best regards,
Seishin

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LM46002: BIAS