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LTC3201 - 100mA Ultralow Noise Charge Pump LED Supply with Output Current Adjust

Low external parts count (one small flying capacitor and three small bypass capacitors) and small MSOP-10 package size make the LTC3201 ideally suited for space constrained applications. An input noise filter further reduces input noise,thus enabling direct connection to the battery. High switching frequency enables the use of small external capacitors.

The LTC3201 contains overtemperature protection and can survive an indefinite output short to GND. Internal soft-start circuitry also prevents excessive inrush current on start-up. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1µA.

Features Input Noise Filter Minimizes Supply Noise Constant Frequency Operation 3-Bit LED Current Control No Inductors Low Shutdown Current: IIN < 1µA Output Current: 100mA VIN Range: 2.7V to 4.5V 1.8MHz Switching Frequency Soft-Start Limits Inrush Current at Turn-On Short-Circuit and Overtemperature Protected Available in 10-Pin MSOP Package Typical Application

Applications White LED Backlighting Programmable Boost Current Source Packaging

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