Product details


Channels (#) 30 LED current per channel (mA) 35 LED configuration Parallel LED (#) 30 Program memory No Programmable ramp control No Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Vout (Min) (V) 2.7 Vout (Max) (V) 6 Iout (Max) (A) 1.05 Iq (Typ) (mA) 0.01 Shutdown current (Typ) (uA) 1 Features Constant Current, Current Control, I2C Control, Power Save Mode Operating temperature range (C) -40 to 125 open-in-new Find other RGB & white LED drivers

Package | Pins | Size

VQFN (RJV) 46 30 mm² 6 x 5 open-in-new Find other RGB & white LED drivers


  • 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

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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 constant-current-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.

The LP503x device controls each LED output with a 12-bit PWM resolution at 29-kHz switching frequency. This control helps get an intensity that decreases smoothly and stops audible noise. Having different color-mixing and intensity-control registers makes writing the software code straightforward. When targeting fade-in, fade-out type breathing effects, the global R, G, B bank control reduces the microcontroller loading significantly. The LP503x device also implements a PWM phase-shifting function to help reduce the input power budget when LEDs turn on simultaneously.

The LP503x device has an automatic power-saving mode to get the ultra-low quiescent current. When channels are all off for 30 ms, the device total power consumption is down to 10 µA, making the LP503x device a possible alternative for battery-powered end equipment.

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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
What you need to get started: 

Step 1: Order the hardware 

Step 2: Download and install the LP50EVM user GUI and review the EVM users guide
  • Our LP50EVM GUI is used with the LP50EVM to evaluate the features of the LP50xx device.

Step 3: If you plan to use a MCU based system software, please see this e2e™ post (...)
  • Easy to Verify the LP5036 Device Full Function
  • Easy to Confirm the LP5036 Device Porfermance with the RBG LED Modules
  • Easy to Design the Fashion Lighting Pattern with the Demo Effect
SLVC713A.ZIP (86539 KB)

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Ordering & quality

Support & training

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How-to: Configuring LED brightness, color and patterns with the LP50x GUI tool

Watch a demo of the LP50x RGB LED driver family’s GUI tool. Learn how you can quickly configure brightness, color, and multiple LED lighting patterns.

Posted: 12-Jan-2018
Duration: 03:23

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