MDC3105LT1G

The MDC3105LT1G is an integrated circuit from ON Semiconductor designed to efficiently drive inductive loads such as relays, solenoids, incandescent lamps, and small DC motors. This SOT-23 packaged device replaces multiple discrete components, simplifying circuit design. It is optimized for switching relays from a 3.0 V to 5.0 V rail and can drive relay coils rated up to 2.5 W at 5.0 V.

Key features include a robust driver interface between DC relay coils and sensitive logic circuits, low input drive current, and good back-to-front transient isolation. An internal Zener diode eliminates the need for a free-wheeling diode by routing induced current to ground for quieter system operation. The device guarantees an off state with no input connection and supports large systems with minimal off-state leakage. It is ESD resistant in accordance with the Class 1C Human Body Model.

The MDC3105LT1G operates within an ambient temperature range of -40°C to +85°C and has a continuous output sink current of 500mA. The device is available in a compact SOT-23-3 (TO-236) surface mount package, making it suitable for space-constrained applications. It is Pb-free and Halide-free.

Applications for this load driver include telecom equipment, computer and office peripherals, consumer electronics, industrial automation, and automotive systems requiring 5.0 V driven relays or motor controls.