LTC3206

PRODUCTION

I²C Multidisplay LED Controller

Part Models: 2
1ku List Price: Starting From $2.96

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Overview

Step-Up/Direct-Connect Fractional Charge Pump Provides Up to 92% Efficiency
Up to 400mA Continuous Output Current
Independent Current and Dimming Control for 1-6 LED MAIN, 1-4 LED SUB and RGB LED Displays
LED Currents Programmable Using 2-Wire I²C^™ Serial Interface
1% LED Current Matching
Low Noise Constant Frequency Operation*
Minimal Component Count
Automatic Soft-Start Limits Inrush Current
16 Exponentially Spaced Dimming States Provides
128:1 Brightness Range for MAIN and SUB Displays
Up to 4096 Color Combinations for RGB Display
Low Operating Current: I_VIN = 180µA
Tiny, Low Profile 24-Lead (4mm × 4mm × 0.75mm) QFN Package

The LTC3206 is a highly integrated multidisplay LED controller. The part contains a high efficiency, low noise fractional step-up/direct-connect charge pump to provide power for both main and sub white LED displays plus an RGB color LED display. The LTC3206 requires only four small ceramic capacitors plus two resistors to form a complete 3-display LED power supply and current controller.

Maximum currents for the main/sub displays and RGB display are set independently. Current for each LED is controlled with an internal current source. Dimming and ON/OFF control for all displays is achieved via a 2-wire serial interface. Two auxiliary LED pins can be individually assigned to either the MAIN or SUB displays. 16 individual dimming states exist for both the MAIN and SUB displays. Each of the RED, GREEN and BLUE LEDs have 16 dimming states as well, resulting in up to 4096 color combinations.

The LTC3206 charge pump optimizes efficiency based on V_IN and LED forward voltage conditions. The part powers up in direct-connect mode and automatically switches to 1.5x step-up mode once any enabled LED current source begins to enter dropout. Internal circuitry prevents inrush current and excess input noise during start-up and mode switching. The LTC3206 is available in a 24-lead (4mm × 4mm) QFN package.

Applications

Cellular Phones
Wireless PDAs
Multidisplay Handheld Devices

Part Models: 2
1ku List Price: Starting From $2.96

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
LTC3206EUF#PBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3206EUF#TRPBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC3206EUF#PBF	PRODUCTION
LTC3206EUF#TRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Analog to Digital Converters (ADCs) 1
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor
Level Translators & Buffers 2
LTC4311	PRODUCTION	Low Voltage I²C/SMBus Accelerator
LTC4317	PRODUCTION	Dual I²C/SMBus Address Translator