NXP Dc-to-Dc boost Converter 1A to LPC11U6X

[lpcware]

Content originally posted in LPCWare by jhd on Sat Jan 23 05:57:45 MST 2016
Hello,

I am using a LPC11U6X for HandBox with CoG Display (2x16 FSTN +, 3Vdd) and Keypad. Also a buzzer, 95 mA. And a RF module, 700mA when Tx. 35mA when Rx and 8uA in Stb.

I need a Dc-to-Dc boost converter to AA x 3 rechargables, 1,2V x 2.500mAh in parallel. With one fixed output of 3V3 and 900-1000mA of current.

NXP Is there a product I can use to solve this?  I have seen the PCA9410, but the input voltages is high, 2.5V. and current is 500mA.


Regards

[lpcware]

Content originally posted in LPCWare by Wojtkingson on Thu Feb 18 07:11:42 MST 2016
I tried to find something from TI and there is no suitable chip for you. Solution from LanB is the best way.

[lpcware]

Content originally posted in LPCWare by IanB on Tue Feb 09 15:25:04 MST 2016
WHy not have the three 1.2V cells in series to give 3.6V. Then use a LDO regulator to give 3.3V.

Will any part of your circuit be bothered if the voltage drops to 3.0V (which will happen as the batteries go flat)?

There's not much out there than will run off 1 Volt. Also, do you really want all the noise from a switching regulator interfering with your radio module?