Boost Converters with Output Disconnect in 2mm x 3mm DFN Package from Linear Technology

The LT3495 can deliver over 70mA of output current at 16V from a single Li-Ion cell, making it ideal for applications such as OLED displays. Both parts use a unique control technique that delivers both high efficiency and low output ripple over a wide load current range. This technique guarantees that the switching frequency stays above the audio band for the entire load range, making it ideal for noise-sensitive PMP and audio applications. The combination of the LT3495/-1’s 2mm x 3mm DFN package and tiny, low cost ceramic capacitors and inductors provides a very compact solution footprint.

The LT3495’s NPN switch achieves a VCESAT of only 250mV at 500mA and offers efficiencies as high as 85%. The device’s low 60uA of quiescent current (<1uA in shutdown) maximizes battery run time, while integrated Schottky diodes and output disconnect circuitry minimizes external circuitry. Finally, an integrated dimming/contrast adjustment function is included for display applications. For applications requiring output voltages below 10V, there are also B versions of this device, the LT3495B and LT3495B-1, which offer slightly higher light load efficiency.

The LT3495EDDB, LT3495EDDB-1, LT3495BEDDB and LT3495BEDDB-1 are all available from stock in a 10-lead 2mm x 3mm DFN package.