A3908 Low Voltage DC Motor Driver Features and Benefits Description Constant voltage operation (adjustable) The A3908 is a low voltage bidirectional DC motor driver with 500 mA output peak rating a typical input voltage range of 3 to 5.5 V and output currents up Low power standby mode to 500 mA. The unique output full-bridge incorporates source- Small 2 mm 2 mm, 0.55 mm nominal height DFN side linear operation to allow a constant voltage across the motor package coil. This regulated output minimizes motor voltage change due Typical input voltage range of 3 to 5.5 V to I R variation and battery voltage tolerance. DS(on) Adjustable constant voltage or PWM operation Logic input pins are provided to control the motor direction of Less than 500 nA standby mode current rotation, brake, and standby (< 500 nA supply current) modes and 40 to 85 operating temperature range to allow optional PWM of the sink drivers. Internal protection circuitry includes thermal shutdown, undervoltage lockout, and crossover current (shoot-through) protection. The A3908 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 Package: 8 Contact DFN (suffix EE) 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 test instrumentation systems Approximate Scale 1:1 Typical Application +V BAT VDD IN1 OUTA IN2 CPU A3908 M VREF OUTB R1 18 k VSET GND R2 10 k 3908-DSLow Voltage DC Motor Driver A3908 Selection Guide Part Number Packing A3908EEETR-T Tape and reel, 3000 pieces/reel Absolute Maximum Ratings Parameter Symbol Conditions Min. Typ. Max. Units Supply Voltage V 6 V DD Logic Input Voltage Range V 0.3 6 V IN Output Current I 500 mA OUT Junction Temperature T 150 C J Storage Temperature Range T 40 150 C stg Operating Temperature Range T Range E 40 85 C A Allegro MicroSystems, LLC 22 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com