MDC3105 is an integrated circuit that can be used to switch 3 to 6 Vdc inductive loads such as relays, solenoids, incandescent lamps, and small DC motors without the need of a free−wheeling diode.
The MDC3105 is an integrated relay and inductive load driver designed to replace arrays of discrete components. It is available in a SOT-23 package and can switch 3 to 6 Vdc inductive loads such as relays, solenoids, incandescent lamps, and small DC motors without the need for a free-wheeling diode. The device provides a robust driver interface between DC relay coils and sensitive logic circuits, optimized for switching relays from a 3.0 V to 5.0 V rail.
Key features include low input drive current, good back-to-front transient isolation, and an internal Zener clamp that routes 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 and offers low saturation voltage to reduce system current drain.
| Operating Ambient Temperature Range | -40 to +85 °C |
|---|---|
| Output Zener Breakdown Voltage | 6.2 to 7.0 V |
It can switch 3 to 6 Vdc inductive loads such as relays, solenoids, incandescent lamps, and small DC motors.
No, the device does not require a free-wheeling diode because it features an internal Zener.
The device is optimized to switch relays from a 3.0 V to 5.0 V rail.