The MAX16826ATJ+T is a DC DC controller from Maxim Integrated designed for LED driver applications, specifically automotive backlighting. It operates as a controller — no internal switches — so you pair it with external MOSFETs and magnetics to build the power stage. The part supports SEPIC or boost topology, giving flexibility when the input voltage (4.75 V to 24 V) can sit above or below the LED string voltage. Four independent PWM dimming outputs let you drive multiple LED channels — typical for dashboard or infotainment display backlights where zone dimming or color mixing is needed.
Switching frequency and output count — design constraints
The controller's switching frequency is programmable from 100 kHz to 1 MHz, which lets you balance inductor size against switching losses. Four outputs mean you can drive up to four separate LED strings, each with independent PWM dimming — useful for RGB backlight or multi-zone brightness control. Because there are no internal switches, the external FET selection drives the actual current capability; the controller handles the gate drive and regulation loop.
Surface-mount part in a 32-TQFN (5x5 mm) package with exposed pad. The exposed pad requires a good thermal via pattern to the ground plane.
For a BOM freeze, this part is safe to specify without worrying about a sudden PCN.