Brief Description
The KTD2052 is a fully programmable current regulator for up to four RGB LEDs (12 LEDs total). The device is ideally powered from a supply rail in the 3V to 5V nominal range. A 4-wire bus is multiplexed to reduce the pin-count and PCB traces to the LEDs. Each pin on the bus integrates a switch to the input voltage and a programmable low-dropout current sink regulator.

FEATUREs
• Drives up to 12 LEDs (4 RGBs)
• Multiplexed LED Current Driver Outputs
   ► Only 4 PCB Traces to the LEDs
   ► 20.8kHz MUX Frequency Prevents Audio Noise
• 14 Million Colors
   ► LED Current: 125µA to 24mA in 125µA Steps
   ► Night-Mode: 8µA to 1.5mA in 8µA Steps
   ► 5% Max. Current Accuracy & Matching
• 12 Independent Exponential Fade-Engines
   ► Ultra-Smooth 3072-Step (8µA) Fade Resolution
   ► 3-bit Programmable Fade-Rate
• Flexible Pattern Generator with Watchdog Counter
• Optional AutoBreathe™ Mode (KTD2052B/D)
• Patented1 BrightExtend™ Technology
   ► Maintains Color-Accuracy and PSRR for BatteryPowered Applications with Low Vin
• Proprietary CoolExtend™ Technology
   ► 2-bit Programmable Maximum Die-Temp
• 0.6µA Automatic Shutdown (Standby) Current
• 1MHz I2C Serial Interface
• 2.5V to 5.5V Operating Supply Voltage Range
• -40°C to +85°C Operating Temperature Range
• 8 pin UDFN 2x2mm (0.5mm pitch)

APPLICATIONs
• AI Smart Speakers, Bluetooth / WiFi Loudspeakers
• Automotive Indicator and Ambiance Lighting
• IoT, Gaming, Toys, Indicator / Button Lighting