MIC2282

MIC2282 Single-Cell Ultra Low EMI Boost LED Driver General Description The MIC2282 is a boost LED driver optimized for single cell operation from alkaline, nickel-metal-hydride, or lithium ion batteries. The MIC2282 operates with an input voltage between 0.9V to 15V, driving a string of series LEDs up to 33V. The combination of a low feedback voltage of 220mV and an operating current of 120μA provides a high efficiency solution that prolongs battery life. The MIC2282 requires only five external components (diode, inductor, sense resistor, input capacitor and output capacitor) to implement a low cost LED boost regulator. It is available in a compact 8-pin MSOP package with an operating range from –40°C to +125°. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Features Operates from a single-cell supply (VIN = 0.9V to 15V) Ultra Low EMI 120µA typical quiescent current Adjustable output voltages 220mV sense voltage 20kHz switching frequency Over temperature protection 8-pin MSOP package Low component count solution Applications LED flashlight and head lamps LCD bias generator Battery-powered, hand-held instruments Palmtop computers Remote controls Detectors ___________________________________________________________________________________________________________ Typical Application L1 220µH 8 D1 MBR0530 VOUT = 3V 8 L1 220µH D1 MBR0530 VOUT = 9V IN 1V to1.5V 1 Cell C1 47µF 16V SW MIC2282 GND 7 1...