TPS63070: Constant Regulator output voltage and current from LiPo Battery

Manimaran Kanesan

Part Number: TPS63070

Dear TI,

I am looking for a Buck/Boost Regulator that able to output 5V and 1A. The source of the power is from 2 cell LiPo 7.4V. The battery fully charged Voltage is 8.4V and start to discharge to cut-off Voltage of approximately 3V. So I need a regulator that able to output 5V and 1A for the entire discharge.

WeBench recommended TPS63070RNMR, and below is the circuit from WeBench. I have looked at the datasheet and seems good to me, but need a second opinion.

Questions are,

1. Is this chip able to support LiPo and output 5V and 1A?

2. Is this below circuit is good to go for initial stage?

BRgds

Manimaran

over 5 years ago

0 Julian Hagedorn over 5 years ago

TI__Mastermind 20900 points

Hello Manimaran,
TPS63070 is the correct device for your application. TPS63071 is a fixed output version with 5V output, which might fit even better.
Figure 41 from the data sheet confirms that Iout=1A at Vi=3V,Vo=5V is possible.

the schematic looks ok.

regards,
Julian

0 Manimaran Kanesan over 5 years ago in reply to Julian Hagedorn

Intellectual 460 points

Thanks Julian for quick reply and will consider TPS63071 for my design, same footprint as well.

BRgds

Manimaran

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TPS63070: Constant Regulator output voltage and current from LiPo Battery