MAR9109PD Automotive Injector Driver IC for Engine Control Units

MAR9109PD is a high‑performance injector driver IC specifically designed for automotive engine control modules.

It provides precise and reliable peak‑and‑hold current control for fuel injectors, ensuring optimal fuel atomization and combustion efficiency.

The device integrates dual low‑side drivers with programmable current profiles, supporting both saturated and peak‑and‑hold modes.

Built‑in diagnostics include open‑load detection, overcurrent protection, and thermal shutdown, enhancing system robustness under harsh under‑hood conditions.

Operating from a wide supply range of 5.5V to 36V, MAR9109PD is compatible with 12V and 24V vehicle electrical systems.

Its compact QFN‑20 package (4x4 mm) minimizes PCB footprint while allowing excellent thermal dissipation.

Typical applications include gasoline direct injection (GDI), diesel common rail systems, and aftermarket ECU upgrades.

With fast switching speed and low quiescent current, this driver IC helps meet stringent Euro 6 and EPA emission standards.

All control logic is compatible with 3.3V and 5V microcontrollers, simplifying interface design for engine management units.