A3903

A3903 Low Voltage DC Motor Driver 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 PACKAGE: 8-Contact DFN (suffix EE) Approximate footprint 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 sourceside linear operation to allow a constant voltage across the motor coil. This regulated output minimizes motor voltage change due to I × RDS(on) variation and battery voltage tolerance. Logic input pins are provided to control the motor direction of rotation, brake, and standby (< 500 nAsupply 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 x 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. Applications include: ▪ Robotic actuators and pumps ▪ Portable printers/scanners ▪ Camera lens/shutter control ▪ Battery powered toys and games ▪ Low noise tes...