TPS650830: TPS650832 Vsb issue.

Chen Bogey8

Part Number: TPS650830
Other Parts Discussed in Thread: TPS650832

Hi Sir

The customer follow that suggest from E2E(use a resistor divider from the 2.5V to 1.8V and connect to Vsb ), but customer can’t be turn on TPS650832.

http://e2e.ti.com/support/power_management/pmu/w/design_notes/3202.how-to-connect-pmic-pins-for-ddr3l-lpddr4-lpddr3-etc-memory-types?tisearch=e2e-sitesearch&keymatch=tps650832

Now customer direct connect VR2 1.8V to VSB pin. Then PMIC can be turn on. May we check if there have any suggestion?(attached is customer SCH).

px501c_v01_KBL-U_TI power solution_20170221.pdf

over 8 years ago

0 Jari Niemela13 over 8 years ago

TI__Genius 13850 points

Hi Chen,

The thread has been assigned to the expert of this device.

Best regards,
Jari Niemelä

0 Kevin LaRosa over 8 years ago

TI__Genius 17380 points

Hi Chen,

How long is the V_VPP taking to power up? It looks like it is expecting a quick load switch turn on, perhaps the turn on time of the BUCK the customer is using instead may be too slow?

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TPS650830: TPS650832 Vsb issue.