TPS746-Q1: TPS74633PQWDRVRQ1

Kaushik C

Prodigy 130 points

Part Number: TPS746-Q1

Tool/software:

Please find attached schematic file for voltage regulator, this part is used for converting 5vdc to fix 3.3vdc.

I request to technical review, and let me know if any changes required.

2 months ago

0 Daniel Esparza 2 months ago

TI__Expert 3755 points

Hello Kaushik,

There is risk of running into thermal shutdown if the load is 1Amp. The ambient to junction thermal resistance is 80.3 C/W and the power dissipation would be 1.7w at 1amp, rising the temperature 136.5C over the ambient temperature.

Also, the note states "If the MCU controls the EN pin (TPS74633), remove the resistor R46". I think resistor R45 should be removed instead and R50 be installed.

Regards,

Daniel

0 Kaushik C 2 months ago in reply to Daniel Esparza

Prodigy 130 points

Hello Daniel

I used this converter to power-up wifi-ble module. The max load current is 600 mA.

Yes its the typing mistake for R45.

0 Daniel Esparza 2 months ago in reply to Kaushik C

TI__Expert 3755 points

Hello Kaushik,

Just a note: if the maximum load current is sustained for an extended period of time, the regulator may enter into thermal shutdown if the ambient temperature surpasses 70C. With a continuous current consumption of 300mA, the maximum recommended operating temperature is close to 100C.

Best regards,

Daniel