is there a boost can support 2.5~3V input, 12V/0.5A output?

Bruce li

Other Parts Discussed in Thread: TPS61372, LM5155, TPS61089

Dear TI Experts,

My customer is looking a boost, 2.5~3V input (2*AA battery), 12V output with 0.5A load. I can't find such device on Ti website. Could you kindly help to suggest if TI have a device which can meet this requirment?

Thanks a lot.

over 6 years ago

0 Zack Liu over 6 years ago

TI__Mastermind 34231 points

Hi Bruce,

TPS61372 is a full-integrated synchronous boost converter. The device supports output up to 16V with a 3.8A current limit. Input voltage ranges from 2.5V to 5.5V. And the low-side FET on resistance is 33mohm, high-side FET is 104mohm.

0 Bruce li over 6 years ago in reply to Zack Liu

Genius 5580 points

Dear Zack,
Thanks a lot for your suggest, customer's concern is this device's footprint is too small, not easy to take SMT, besides, thermal issue is their most concern, for they consider when 12V/0.5A(6w) output may need 2.5V/3~4A input, that's 7.5W~10W, this may need a big footprint to make heat dissipation. Could you kindly help to give another suggestion? Thanks a lot.

0 Zack Liu over 6 years ago in reply to Bruce li

TI__Mastermind 34231 points

Hi Bruce,

You may need a controller product. LM5155 is one candidate. Is there an external voltage, like 5V, so that we can use it to power the device.

0 Bruce li over 6 years ago in reply to Zack Liu

Genius 5580 points

Dear Zack,
Thanks a lot for your suggestion, yes, this boost is used for backup power, there is other 12V/5V power on board from main power rail

0 Zack Liu over 6 years ago in reply to Bruce li

TI__Mastermind 34231 points

Hi Bruce,

The 5V power could be used as the power supply of IC. TPS61089 is a 7-A fully-integrated synchronous boost converter. It is a 2.0mm*2.5mm QFN package. Please have a look at this part.

0 Bruce li over 6 years ago in reply to Zack Liu

Genius 5580 points

Dear Zack,
Got it , thanks a lot for your support.

Power management

Power management forum

is there a boost can support 2.5~3V input, 12V/0.5A output?