MSP430FR6047: Power Management for Ultrasonic Water/flow meter application

Ashenafi Abebaw

Part Number: MSP430FR6047
Other Parts Discussed in Thread: TPS61094, TPS62740

Our company will use an MSP430FR6047 MCU with a sub 1 GHz communication feature for ultrasonic water/flow meter applications. And for the power management option, we have two best alternatives.

1) Using TPS61094 Buck-Boost as per this application note -> https://www.ti.com/lit/an/slvaf41a/slvaf41a.pdf?ts=1676641803021

2) Using TPS62740 Buck and TPS61292 Boost together as per this application note -> https://www.ti.com/lit/ug/tiduad2/tiduad2.pdf?ts=1676642113517&ref_url=https%253A%252F%252Ftraining.ti.com%252F

To proceed with one of those, we must first determine which one is superior in all aspects, particularly performance and reliability. Could someone please assist me with this?

over 1 year ago

0 Cash Hao11 over 1 year ago

TI__Mastermind 27505 points

Hi,

You set this thread in the MSP department. So from MSP requirement, usually we would use a dedicate LDO for the MCU for ultrasonic measurement, like TPS73533 is used in the LP.

For the sub 1G part, you might need to change this thread to the LDO/simple link department for further supports.

Best regards,

Cash Hao

0 Ashenafi Abebaw over 1 year ago in reply to Cash Hao11

Prodigy 90 points

Hi Cash,

Thank you for your thoughtful response. I moved the thread to the power management forum and am awaiting a response.

So you suggest TPS73533 for the MCU, correct? Is TPS73533 the best option? Sorry, but I just wanted to make sure before proceeding.

Last but not least, which is better suited for battery-powered circuits, DC-DC Buck or LDO?

0 Cash Hao11 over 1 year ago in reply to Ashenafi Abebaw

TI__Mastermind 27505 points

HI,

The TPS73533 might not be the best option for cost-effectively. You can look into specs like I >= 200mA, with a good Load Transient Response which are important for the ultrasonic application.

Best regards,

Cash Hao

0 Ashenafi Abebaw over 1 year ago in reply to Cash Hao11

Prodigy 90 points

Hi Cash, Thank you

Can you say something about this please? "Last but not least, which is better suited for battery-powered circuits, DC-DC Buck or LDO?"

0 Cash Hao11 over 1 year ago in reply to Ashenafi Abebaw

TI__Mastermind 27505 points

Hi,

I am not sure which is better suited for battery-powered circuits from my MSP knowledge.

Best regards,

Cash Hao

0 Ashenafi Abebaw over 1 year ago in reply to Cash Hao11

Prodigy 90 points

Hi Cash,

Ok, thank you.

**Attention** This is a public forum

MSP low-power microcontrollers

MSP low-power microcontroller forum

MSP430FR6047: Power Management for Ultrasonic Water/flow meter application