LTC3215

PRODUCTION

700mA Low Noise High Current LED Charge Pump

Part Models: 2
1ku List Price: Starting From $2.40

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Overview

High Efficiency Operation: 1x, 1.5x or 2x Boost Modes with Automatic Mode Switching
Ultralow Dropout I_LED Current Control
Output Current up to 700mA
Low Noise Constant Frequency Operation*
Wide V_IN Range: 2.9V to 4.4V
Open/Shorted LED Protection
LED Disconnect in Shutdown
Low Shutdown Current: 2.5µA
4% LED Current Programming Accuracy
Automatic Soft-Start Limits Inrush Current
No Inductors
Tiny Application Circuit (All Components <1mm Profile)
3mm × 3mm 10-Lead DFN Package

The LTC3215 is a low noise, high current charge pump DC/DC converter designed to power high current LEDs. The part includes an accurate programmable current source capable of driving loads up to 700mA from a 2.9V to 4.4V input. Low external parts count (two flying capacitors, one programming resistor and two bypass capacitors) makes the LTC3215 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. LED current is programmed with an external resistor. The LED is disconnected from V_IN during shutdown.

An ultralow dropout current source maintains accurate LED current at very low I_LED voltages. Automatic mode switching optimizes efficiency by monitoring the voltage across the LED current source and switching modes only when I_LED dropout is detected. The LTC3215 is available in a low profile 3mm × 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 $2.40

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
LTC3215EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3215EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LTC3215EDD#PBF	PRODUCTION
LTC3215EDD#TRPBF	PRODUCTION

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:

LTC3215

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.