LTC3459 Datasheet | Linear Technology

10V Micropower Synchronous Boost Converter Features n Small Solution Size n >85% Efficiency over Wide Load Range n Internal Synchronous Rectifier n VIN Range: 1.5V to 5.5V n 5V at 30m A from 3.3V Input n 3.3V at 20m A from 2 AA Cell Input n Programmable Output Voltages Up to 10V n Burst Mode® Operation n Inrush Current Limiting n Output Disconnect in Shutdown n Ultralow Quiescent (10μA) and Shutdown (<1μA) Currents n Low Profile 2mm × 2mm DFN, 2mm × 3mm DFN or SOT-23 Package APPLICATIONS n General Purpose Micropower Boost n Digital Cameras n PDAs n LCD Bias n Small OLED Displays n Supercap Charging DESCRIPTION The LTC®3459 is a low current, high efficiency synchronous boost converter intended for low power, size constrained portable applications. The LTC3459 can be powered from a single lithium ion battery, a 2- to 3-cell stack of alkaline or nickel batteries, or any low impedance voltage source between 1.5V and 5.5V. The output is programmable via an external divider between 2.5V and 10V. Although the part is primarily intended for boost applications, VOUT will maintain regulation below VIN (at reduced efficiency). The LTC3459 offers Burst Mode operation with a fixed peak current, providing high conversion efficiency over a wide range of load currents. During start-up, inductor current is controlled preventing the inrush surge current found in many boost converters. In shutdown the output is disconnected from the input and quiescent current is reduced to <1μA. The LTC3459 is offered in low profile 6-pin 2mm × 2mm DFN, 2mm × 3mm DFN or SOT-23 (Thin SOTTM) packages, allowing a tiny footprint for the total solution. , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION 5V to 8V Converter 5V 1μF 22μH OFF ON VOUT SHDN FB GND 2M 365k 47p F VOUT 8V 30m A 4.7μF 3459...