TLV61225

Peter Honeder

Other Parts Discussed in Thread: TLV61225

Hi!

I was wondering if the TLV61225 can be operated in shutdown mode with VIN 0V or VIN > 0V while VOUT is supplied from another source and > 0V. The datasheet mentions this:

During shutdown, the
converter stops switching and all internal control circuitry is turned off. In this case, the input voltage is connected
to the output through the back-gate diode of the rectifying MOSFET.

Does this mean, that current from the output to the input is blocked by the internal diode?

Thanks,

Peter

over 7 years ago

0 Jasper Li over 7 years ago

TI__Mastermind 46905 points

hello
could you double confirm part number "TLV61255"? because we don't have this device.

0 Peter Honeder over 7 years ago in reply to Jasper Li

Prodigy 60 points

Hi!

sorry, I had a typo in the chip name it is TLV61225.

Thanks,
Peter

0 Jasper Li over 7 years ago in reply to Peter Honeder

TI__Mastermind 46905 points

yes. it is OK to apply an voltage to VOUT pin when the VIN=0 or device shuts down

0 Peter Honeder over 7 years ago in reply to Jasper Li

Prodigy 60 points

Thanks, perfect!

0 Peter Honeder over 7 years ago in reply to Jasper Li

Prodigy 60 points

Hi Jasper,

I had one more follow-up question. Do you know how much current can flow through the device in that scenario? I was wondering if the TLV61225 can function similarly to a protection diode as well (e.g. consider VIN connected to a battery, current coming from the output side).

Thanks,
Peter

0 Jasper Li over 7 years ago in reply to Peter Honeder

TI__Mastermind 46905 points

it is approximate 1uA flowing into VOUT to GND. The current from VOUT to VIN should very small, the leakage current of the MOSFET. but we don't specify this value.

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TLV61225