Boost regulator for backlight — obsolete, sourced per RFQ
The Texas Instruments LM3503SQX-16/NOPB is a DC DC Regulator using a Step-Up (Boost) topology, designed primarily for backlight applications. It integrates two internal switches and supports both Analog and PWM dimming control. Switching at 1 MHz, the part delivers a regulated output up to 16 V with a switch current limit of 400 mA per channel.
Parametric profile — 1 MHz switching, 16 V ceiling
The 1 MHz switching frequency allows the use of small-value inductors and ceramic capacitors, keeping the total solution footprint compact. Two outputs share the 400 mA switch current budget — the designer must allocate current per channel within that ceiling.
Lifecycle — obsolete, no direct successor on record
For new designs, a pin-compatible alternative from the same functional family should be evaluated.