UM1660S

UM1660 Low Power DC/DC Boost Converter UM1660S SOT23-5 UM1660DA DFN6 2.0×2.0 General Description The UM1660 is a PFM controlled step-up DC-DC converter with a switching frequency up to 1MHz. The device is ideal to generate output voltage for small to medium LCD bias supplies and white LED backlight supplies from a single cell Li-Ion battery. The part can also be used to generate standard 3.3V/5V to 12V power conversions. With a high switching frequency of 1MHz, a low profile and small board area solution can be achieved using a chip coil and an ultra small ceramic output capacitor. The UM1660 has an internal 400mA switch current limit, offering lower output voltage ripple. The low quiescent current (typically 36µA) together with an optimized control scheme, allows device operation at very high efficiencies over the entire load current range. Applications Features  LCD Bias Supply  White LED Supply for LCD Backlights  Digital Still Camera  PDAs, Organizers and Handheld PCs  Cellular Phones  Standard 3.3V/5V to 12V Conversion  2.0V to 6.0V Input Voltage Range  Adjustable Output Voltage up to 28V  400mA Internal Switch Current  Up to 1MHz Switching Frequency  36µA Typical No Load Quiescent Current  1µA Maximum Shutdown Current  Internal Soft-Start  Available in Tiny SOT23-5 and DFN6 2.0×2.0 Packages Pin Configurations Top View (Top View) 54 M M SW 1 5 VIN PHO GND 2 FB 3 4 EN (Top View) VIN 1 GND 2 EN 3 6 SW 5 NC 4 FB 123 M: Month Code UM1660S SO...