This is a 5V to 12V DC-DC step-up (boost) converter circuitry that is especially ideal for the USB powered applications. First of all a USB port has two current supply modes. Before detecting the ...
Linear Technology Corp. announces the LTC3892, a high-voltage dual-output synchronous step-down DC/DC controller that draws only 29µA when one output is active and 34µA when both outputs are enabled.