LP2951DR / Reverse Current Protection

Ryuji

Guru 20090 points

Other Parts Discussed in Thread: LP2951

Hello,

I think that LP2951DR doesn't have the Reverse Current Protection function.
If there is possibility Vout>Vin, should we add the reverse current protection diode between Vin and Vout?

Best Regards,

Ryuji Asaka

over 12 years ago

0 Ron Michallick over 12 years ago

TI__Guru**** 165176 points

Ryuji,

LP2951 does have reverse current protection. No diode is needed.

Correction: with VIN = 0V it blocks over 6V. With VIN > 0 the blocking goes away.

0 Ryuji over 12 years ago in reply to Ron Michallick

Guru 20090 points

Hello Ron san,

Thank you for the reply.

I can't find any description of the reverse current protection on LP2951 datasheet.

Could you please kindly let me know I can find the description where to look ?

Best Regards,

Ryuji Asaka

0 Ron Michallick over 12 years ago in reply to Ryuji

TI__Guru**** 165176 points

Ryuji,

The data sheet neither confirms or denies reverse current protection.
Reverse current has been tested (up to 5V in attachment).

Correction: with VIN = 0V it blocks over 6V. With VIN > 0 the blocking goes away.

LP2951-33 IOUT & VOUT (no diode).pdf

0 Ron Michallick over 12 years ago in reply to Ron Michallick

TI__Guru**** 165176 points

Ryuji,

I extended the test and reverse current blocking was good up to 8V.
For VOUT greater than 8V, a diode is needed.

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LP2951DR / Reverse Current Protection