A3903: Low Voltage DC Motor Driver (Discontinued)

This part is in production but has been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available.

Date of status change: July 1, 2019.

Deadline for receipt of LAST TIME BUY orders: December 27, 2019.

Recommended Substitutions: A3906SESTR-T.

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 source-side linear operation to allow a constant voltage across the motor coil. This regulated output minimizes motor voltage change due to I × R_DS(on) variation and battery voltage tolerance.

Logic input pins are provided to control the motor direction of rotation, brake, and standby (< 500 nA supply current) modes and to allow optional PWM of the sink drivers. Internal protection circuitry includes thermal shutdown, undervoltage lockout, and crossover current (shoot-through) protection.

The A3903 is supplied in a 2 mm × 2 mm, 0.55 mm nominal height, 8-lead DFN package, with exposed thermal pad (package suffix EE). This small footprint package is lead (Pb) free, with 100% matte tin leadframe plating.