BQ24075-Q1: Battery Charger PMIC with regulated buck boost outputs

Kaveh Mohammad

Part Number: BQ24075-Q1
Other Parts Discussed in Thread: BQ24075

Hi,

I am currently using BQ24075-Q1 in my design to charge a 4.2V Li-Ion battery from an input 5VCC so that when the input is not available I can drive my load from the battery.

My load is an MCU that needs 1.5V and 3.3V as well as a 5VCC to run. So when the 5VCC is not available I have to generate these supplies from my battery voltage to run the MCU.

Is there a PMIC that can charge my battery and at the same time has an internal buck boos converters with multiple outputs that can generate 5V, 3.3V and 1.5V for me from the battery voltage when the internal 5VCC supply is not available? If not is there a PMIC I can use along with BQ24075 that can buck-boost my battery voltage (max 4.2V to min 3V) to generate 5V, 3.3V and 1.5V supplies,

Please let me know,

Thanks

5 months ago

0 Juan Ospina 5 months ago

TI__Genius 11925 points

Hi,

I see that you are using a BQ24075-Q1. Does your solution need to be automotive qualified?

Best Regards,

Juan Ospina

0 Kaveh Mohammad 5 months ago in reply to Juan Ospina

Prodigy 110 points

Please give me automotive qualified or non-automotive qualified options.

Thanks

+1 Juan Ospina 5 months ago in reply to Kaveh Mohammad

TI__Genius 11925 points

Hi,

In that case, the best device would be the BQ2512x, which offers an integrated buck and LDO rails which would be capable of supplying the 1.5V and 3.3V power rails. This could be used in tandem with a low-cost boost converter to achieve the 5V rail as well.

Otherwise, if you would like to look for a PMIC specifically, I recommend creating a new E2E thread with a PMIC as the thread device. The PMIC team would be better able to inform you on the best device.

Best Regards,

Juan Ospina

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BQ24075-Q1: Battery Charger PMIC with regulated buck boost outputs