My customer decides to use LTM4676A and LTM4677 in their system.
At their system, the operating condition of LTM4676A and LTM4677.
A. Vin : 5V
B. Vout : 1V
But when they test with ADI EVM, the initial value of VIN_ON isn't support 5V Vin because the default value of VIN_ON would be 5.5V.
So they need to change the value of VIN_ON register to 4.2V.
For this reason, they should change the value of VIN_ON register to 4.2V.
But unfortunately, before turning on power ( supplying 1V), they can't use PMBUS or MCU.
So they need your help about changing initial value of VIN_ON register .
Please refer below questions and let me know your advices.
Q1) For supporting their condition (Vin: 5V, Vout 1V) , should they change the value of VIN_ON register from 5.5V to 4.2V?
Q2) Could you provide LTM4676A & LTM4677 with changing the value of VIN_ON register from 5.5V to 4.2V?
Q3) Do you have any other methods to support Vin 5V and Vout 1 V condition at LTM4676A and LTM4677 without using PMBUS ?
If you have any opinions, please advise me.
Sorry for delay. If you have local ADI FAE support, please go through them as you may get answers faster than in E-zone.
I am not expert of these products but these are what I got after LTM4676A…
Thank you for your kind explain.
I received below answer from Haihua in EZ.
"Customer can order the pre-programmed part with VIN_ON updated for 5Vin application.
Parts can be programmed…
I still wait your opinions about above request.
I am not expert of these products but these are what I got after LTM4676A datasheet study:
Parts can be programmed while VIN is not available as well. Please refer to page 59 of datasheet for detail."