LP8733: EN pin control

futoshi kawarazaki

Part Number: LP8733
Other Parts Discussed in Thread: AM2431

Use LP87334D for power supply for AM2431.

I refer to "Figure 5-7. Using LP87334D to Power AM243x (ALV Package) with LPDDR4 Memory Support" in ”Using LP8733xx and TPS65218xx PMICs to Power AM64x and AM243x Sitara Processors”.

Is there a reference circuit for the EN pin of the LP87334D?

VSYS is 5V.

over 2 years ago

0 Daniel W over 2 years ago

TI__Genius 13216 points

Hi,

The signal driving the EN pin will depend on your system. This just needs to be the signal you want to trigger the power sequence. Often it can be a powergood signal from the Vsys pre-reg.

Thanks,

Daniel W

0 futoshi kawarazaki over 2 years ago in reply to Daniel W

Prodigy 155 points

HI Daniel

Vsys does not have powergood signal.
Please introduce TI's IC suitable for making powergood signal from 5V?

+1 Daniel W over 2 years ago in reply to futoshi kawarazaki

TI__Genius 13216 points

Hi,

One option is the TLV809E

Another option is just having Vsys tied to EN if you do not need voltage monitoring.

Thanks,

Daniel W

0 futoshi kawarazaki over 2 years ago in reply to Daniel W

Prodigy 155 points

HI Daniel

Thanks

Power management

Power management forum

LP8733: EN pin control