Description

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.

Features and Benefits

▪ 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

▪ –40 to 85 operating temperature range