Boost regulator with dual outputs and dimming control
The LM3503SQX-25 is a step-up (boost) DC-DC regulator designed primarily for LED backlight applications. It integrates two outputs, each capable of driving LED strings, with both analog and PWM dimming control for brightness adjustment.
1 MHz switching and 25 V output ceiling
Switching at 1 MHz allows the use of small inductors and ceramic capacitors, keeping the backlight supply compact. The 25 V output rating supports strings of up to six or seven white LEDs in series, depending on their forward voltage drop.
The LM3503SQX-25 is listed as obsolete. Buyers needing this exact order code for a BOM line must source through independent distribution or the surplus market.