Automotive LED driver controller with dual-topology flexibility
The MAX25600ATI/VY+ is a DC-DC controller IC designed for LED driving, operating as either a step-down (buck) or step-up (boost) converter without requiring an external controller change — the same part handles both topologies based on the LED string voltage relative to the supply rail. The controller drives external MOSFETs (no internal switches —), so the power-stage current rating is set by the external FETs and inductor, not by the IC itself. This lets the same controller serve a 1A string or a 10A string with appropriate external components.
Four independent channels with dual dimming control
Four separate LED driver outputs allow independent current regulation for multiple strings — for example, separate day-time running lights, turn indicators, and low-beam channels in an automotive headlamp module, each with its own dimming profile. Dimming is supported in both analog and PWM modes. Analog dimming adjusts the LED current continuously, while PWM dimming switches the LEDs at a duty cycle for a wider effective dimming range without color shift — the PWM frequency is set independently of the switching converter frequency. The switching frequency is programmable from 200 kHz to 700 kHz. A higher frequency shrinks the magnetics but increases switching losses in the external FETs; 400 kHz is a common trade-off for automotive EMI compliance.
Wide input range and package for automotive board assembly
The supply voltage range spans 5V to 60V, covering the full 12V and 24V automotive battery bus including cold-crank dips down to 5V and load-dump transients up to 60V — no external pre-regulator or clamp is needed for these transient conditions. Housed in a 28-lead WFQFN with exposed pad (5x5mm TQFN —,), the package includes wettable flanks that enable automated optical inspection (AOI) of the solder joints after reflow — a requirement for automotive-grade surface-mount assembly lines.
Active lifecycle and compliance status
Availability and current pricing confirmed at RFQ time.