A3903 Datasheet - Allegro Micro Systems

A3903 Low Voltage DC Motor Driver

The A3903 is a low voltage bidirectional DC motor driver with a typical input voltage range of 3 to 5.5 V and output currents up to 500 mA. The unique output full-bridge incorporates sourceside linear operation to allow a constant voltage across the motor coil. This regulated output minimizes motor .

A3903 Features

* ▪ Constant voltage operation (adjustable) ▪ 500 mA output peak rating ▪ Low power standby mode ▪ Small 2 mm × 2 mm, 0.55 mm nominal height DFN package ▪ Typical input voltage range of 3 to 5.5 V ▪ Adjustable constant voltage or PWM operation ▪ Less than 500 nA standby mode current ▪

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A3903_AllegroMicroSystems.pdf