5 Volt power supply for USB host port from li-ion accu

thseiler said:

Hi

(I am new to this forum, got the address from a good friend...)

I need to add a USB 1.1 host port to an existing 3,3V microcontroller design.
(plan to use ISP1161 from philips as usb controller, it interfaces nicely to 3,3V)

My Problem: for the USB host port I need to supply 5 volts @ 500mA.
The existing design runs from a 3,65V, 1700mA/h Li-Ion accu.

Does anyone know of an IC that implements a high efficiency Charge Pump or Step-Up Converter to get 5V@500mA from a Li-Ion accu?

Best i have found so far is TPS60130 from TI, 5 volts@300mA with 85% efficiency.

Thank you very much
tom

Click to expand...

thseiler said:

My Problem: for the USB host port I need to supply 5 volts @ 500mA.
The existing design runs from a 3,65V, 1700mA/h Li-Ion accu.

Does anyone know of an IC that implements a high efficiency Charge Pump or Step-Up Converter to get 5V@500mA from a Li-Ion accu?

Best i have found so far is TPS60130 from TI, 5 volts@300mA with 85% efficiency.

Click to expand...