LTC3214

PRODUCTION

500mA Camera LED Charge Pump

Part Models: 2
1ku List Price: Starting From $2.07

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Overview

Low Noise Constant Frequency Operation
High Efficiency: Up to 94%
Multi-Mode Operation: 1x, 1.5x or 2x Boost Modes
Automatic Mode Switching
High Output Current: Up to 500mA
Tiny Application Circuit (3mm × 3mm DFN Package All Components <1mm High)
Automatic Soft-Start
Output Disconnect
Open, Shorted LED Protection
No Inductors
Internal 110mΩ LED Current Sense Resistor 3mm × 3mm 10-Lead DFN Package

The LTC3214 is a low noise, high current charge pump DC/DC converter capable of driving high current LEDs at up to 500mA from a 2.9V to 4.5V input. Low external parts count (two flying capacitors, one programming resistor and two bypass capacitors at V_IN and CPO) make the LTC3214 ideally suited for small, battery-powered applications.

Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors.

Output current level is programmed by an external resistor. LED current is regulated using an internal 110mΩ sense resistor. Automatic mode switching optimizes efficiency by monitoring the voltage across the charge pump and switching modes only when dropout is detected. The part is available in a low profile 3mm x 3mm 10-lead DFN package.

Applications

LED Torch/Camera Light Supply for Cell Phones, PDAs and Digital Cameras
General Lighting and/or Flash/Strobe Applications

Part Models: 2
1ku List Price: Starting From $2.07

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3214EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3214EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC3214

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.