TPS61040: typical circuit for drawing 60mA from TPS61040 + 14.5V & 3.3V IC (common or different) to power the LCD driver and MCU

Kushanga Bisht55

Part Number: TPS61040
Other Parts Discussed in Thread: TLV61046A, TPS61093, TPS61046

hello.

In one design, using TPS61040, can we draw 60mA from the circuit. if yes please help to suggest the typical circuit for this much current draw.

Specs for the system are -

Vin - 1.8V to 4.2V

Vout - 14.5V

Iout - 50mA to 60mA

Also want to use 14.5V and 3.3V to control the LCD backlight and MCU respectively. Can we use same IC for that or different ones.

Thanks,

Kushang

over 8 years ago

0 Jasper Li over 8 years ago

TI__Mastermind 46905 points

You may need two different device for the two voltage rail.
TPS61040 can't support this output power. you can have a look at TPS61046, TLV61046A or TPS61093 for the 14.5V rail.

For the 3.3V power rail, you may need a buck-boost converter or the boost converter with LDO. I'm not sure which kind of battery you are using. why input voltage ranges from 1.8V to 4.2V.