Product details


Channels (#) 1 Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Switching frequency (Max) (kHz) 500 Product type Inductive LED current per channel (mA) 30 Shutdown current (Typ) (uA) 1 Topology Boost Peak efficiency (%) 88 Features I2C Control Operating temperature range (C) -30 to 85 open-in-new Find other Backlight LED drivers

Package | Pins | Size

DSBGA (YFQ) 12 0 mm² 1.25 x 1.65 DSBGA (YFZ) 12 0 mm² 1.25 x 1.65 open-in-new Find other Backlight LED drivers


  • Drives up to 11 LEDs in series
  • 1000:1 Dimming Ratio
  • 90% Efficient
  • Programmable Dual Ambient Light Sensor Inputs
    with Internal ALS Voltage Setting Resistors
  • I2C Programmable Logarithmic or
    Linear Brightness Control
  • External PWM Input for Simple Brightness
  • True Shutdown Isolation for LEDs and Ambient
    Light Sensors
  • Internal Soft-Start Limits Inrush Current
  • Wide 2.7-V to 5.5-V Input Voltage Range
  • 40-V and 25-V Overvoltage Protection Options
  • 500-kHz Fixed Frequency Operation
  • 839-mA Peak Current Limit
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The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.

The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.

The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.

The LM3530 operates over the −40°C to 85°C temperature range.

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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

SNVC045.ZIP (2248 KB)

Software development

Linux Driver for LM3530
LM3530SW-LINUX The Linux driver supports the LM3530 White LED Driver. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.


Linux Mainline Status

Available in Linux Main line: Yes
Available through N/A

Supported Devices:

  • lm3530


Linux Source Files

The files (...)

CAD/CAE symbols

Package Pins Download
DSBGA (YFQ) 12 View options
DSBGA (YFZ) 12 View options

Ordering & quality

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