LM3503 Datasheet – Display Constant Current LED Driver

Part Number: LM3503

Function: Dual-Display Constant Current LED Driver with Analog Brightness Control

Package: MicroSMD 10 Pin, SQA16 Pin Type

Manufacturer: Texas Instruments


LM3503 datasheet



The LM3503 is a white LED driver for lighting applications. For dual display backlighting applications, the LM3503 provides a complete solution. The LM3503 contains two internal white LEDcurrent bypass FET (Field Effect Transistor) switches. The white LED current can be adjusted with a DC voltage from a digital to analog converter or RC filtered PWM (pulse-width-modulated) signal at the Cntrl pin.


• Drives up to 4, 6, 8 or 10 White LEDs for Dual Display Backlighting
• >80% Peak Efficiency
• Output Voltage Protection Options: 16V, 25V,35V & 44V
• Input Under-Voltage Protection
• Internal Soft Start Eliminates Inrush Current
• 1 MHz Constant Switching Frequency
• Analog Brightness Control
• Wide Input Voltage Range: 2.5V to 5.5V
• Low Profile Packages: <1 mm Height
– 10 Bump DSBGA
– 16 Pin WQFN

Other data sheets are available within the file:

LM3503ITL-16/NOPB, LM3503ITL-25/NOPB, LM3503ITL-35/NOPB, LM3503ITL-44/NOPB

LM3503 Datasheet PDF Download

LM3503 pdf