1 Features
1• Operating Voltage Range:
– VCC Range: 2.7 V to 5.5 V
– EN, SDA, and SCL Pins Compatible With 1.8-
V, 3.3-V, and 5-V Power Rails
– Output Maximum Voltage: 6 V
• 36 Constant-Current Sinks With High Precision
– 25.5 mA Maximum per Channel When VCC in
Full Range
– 35 mA Maximum per Channel When VCC ≥ 3.3
V
– Device-to-Device Error ±5%; Channel-to-
Channel Error ±5%
• Ultralow Quiescent Current:
– Shutdown Mode: 1 μA (Maximum) When EN
Low
– Power Saving Mode: 12 μA (Maximum) When
EN High and All LEDs Off for > 30 ms
• Integrated 12-Bit, 29-kHz PWM Generator for
Each Channel:
– Independent Color-Mixing Register Per
Channel
– Independent Brightness-Control Register Per
RGB LED Module
– Optional Logarithmic- or Linear-Scale
Brightness Control
– Integrated 3-Phase-Shifting PWM Scheme
• 3 Programmable Banks (R, G, B) for Easy
Software Control of Each Color
• 2 External Hardware Address Pins Allow
Connecting up to 4 Devices
• Broadcast Slave Address Allows Configuring
Multiple Devices Simultaneously
• Auto-Increment Allows Writing or Reading
Consecutive Registers Within One Transmission
• Up to 400-kHz Fast-Mode I2C Speed

2 Applications
LED Lighting, Indicator Lights, and Fun Lights for:
• Smart Speaker
• Smart Home Appliances
• Video Doorbell
• Electric Smart Lock
• Smoke Detector
• Set-Top Box
• Smart Router
• Handheld Devices

3 Description
Efficient and high-performance LED response effects,
such as blinking, breathing, and chasing, are critical
to improving end-user experience in many human
machine interface (HMI) applications.
The LP503x device is a 30- or 36-channel constantcurrent-
sink LED driver. The LP503x has a 29 kHz,
12-Bit PWM generator for each channel, as well as
channel/module independent color mixing and
intensity control, formerly called brightness control
registers to enable vivid LED effects with zero audible
noise. Users can benefit from the device’s ultra-low
shutdown Iq Power Saving Mode, while designers will
appreciate the incredibly straightforward software
coding of the LP503x’s three programmable R G B
banks.