TPSM265R1: TPSM265R1 in the inverting buck boost convertor circuit

Iwata Etsuji

Part Number: TPSM265R1

Hi team,

How should we design the PCB layout for TPSM265R1 in the inverting buck boost topology(VIN=24, VOUT=-15V/IOUT<50mA), especially heatsinking?

Best regards,
Iwata Etsuji

over 5 years ago

0 Neal Zhang over 5 years ago

TI__Expert 4720 points

Hi,

We will have the corresponding AE to reply you next week because US is in holiday.

0 Jimmy Hua over 5 years ago

TI__Guru 50120 points

Hi,

Please follow the same PCB layout recommendations in Section 10.1. Note that when converting from buck to inverting buck boost topology, the IC return path is now -VOUT and the IC output pin is now GND as shown in the following app note (SNVA882). VIN, - VOUT and GND copper planes should be large to minimize thermal stress.

Regards,

Jimmy

Power management

Power management forum

TPSM265R1: TPSM265R1 in the inverting buck boost convertor circuit