AWR1642BOOST: TPS79601DRBR

John Manyala

Part Number: AWR1642BOOST
Other Parts Discussed in Thread: AWR1642, TIDEP-0092

Hi,

The AWR1642 requires 4 rails 3.3 V, 1.2 V, 1.8 V and 1.3 V. The TIDEP-0092 has a 5th rail called VPP-1P7 forwhich is the voltage supply for fuse chain that is supplied from the 5V_IN via ultra-low noise LDO called TPS79601DRBR (U11). What's the current requirement for VPP_1P7? What's the max noise thresholds for VPP_1P7? Can this be supplied by any of the 4 rails going to the AWR1642?

The same TPS79601DRBR LDO is used to source 3.3V to TM4C1294NCPDTT via 3V3_BRD pin. Can this supply be sourced from the other available 3.3 V within the board? What's the current and ripple voltage requirement for this supply?

Thanks,

John

over 5 years ago

0 Cesar over 5 years ago

TI__Guru*** 139659 points

Hi,

The hw team will get back to you

thank you
Cesar

0 Vivek Dham over 5 years ago in reply to Cesar

TI__Guru 58035 points

Hello John,
The VPP supply is needed ONLY for the secure variant of the AWR device when the user wants to fuse his own security keys. Otherwise this supply is not needed and can be left open.
The supply requirements for the VPP supply is 1.7V and should be within 2% .

Regards,
Vivek

0 John Manyala over 5 years ago in reply to Vivek Dham

Intellectual 410 points

Hi Vivek,

Thanks a lot for the clarification on VPP supply.

Do you know the current and noise requirement for the 3V3_BRD supply? Can this supply be sourced from other available 3.3 V within the board or must it have an LDO?

Thanks,

John

0 Vivek Dham over 5 years ago in reply to John Manyala

TI__Guru 58035 points

Hello John,

The 3.3V supply is the IO supply, so the current consumption would depend on the interfaces you are using in your application, how often you use then , what frequency you sent them etc.

The noise requirements for this rail are not stringent since its not used for analog/RF. You can share it with other on board supplies with some passive filtering (like beads).

regards,

Vivek

0 John Manyala over 5 years ago in reply to Vivek Dham

Intellectual 410 points

Thanks again Vivek.

Regards,

John

Sensors

Sensors forum

AWR1642BOOST: TPS79601DRBR