4.5V to 42V input system design

Jayamohan Muthusamy

Other Parts Discussed in Thread: TPS62090, TPS54260, TPS62230

Hi,

Kindly refer the attached block diagram.

The input voltage is 4.5V - 42V DC. With this voltage i need to charge 3.7V li-ion battery and the output with battery backup should be as follows,

1) +5V / 500mA (for USB sections etc)

2) +3.6V/2.5A (for GPRS modem, GPS section etc)

3) 3.3V/ 500mA (for Microcontroller,memory,serialport etc)

4)1.2V/100mA( for microcontroller CPU core).

Kindly suggest the suitable regulators so that i can achieve this power management with minimum regulators.

Awaiting for your feedback at the earliest.

over 12 years ago

0 Chris Glaser over 12 years ago

TI__Guru**** 150650 points

You can find power devices that meet your needs needs at power.ti.com with the power quick search. I would also recommend posting in the battery charger forum for their recommendation for a charger.

But devices that I can think of would be TPS54260 for the input voltage to 5V step down; TPS62090 for the 3.6V one; TPS630x0 for the 5V USB one. TPS6223x could be used for 3.3V and 1.2V from 5V.

0 Jayamohan Muthusamy over 12 years ago in reply to Chris Glaser

Prodigy 115 points

Hi,

I could not find any on TPS6223x series for 3.3V and 1.2V output.

can u verify this once please.

0 Chris Glaser over 12 years ago in reply to Jayamohan Muthusamy

TI__Guru**** 150650 points

Please replace the x with any number. Start with 0. So, look at the TPS62230 datasheet.

Power management

Power management forum

4.5V to 42V input system design