ARCHIVED - Feb. 2010: The 34921 power IC integrates three motor drivers, multiple power regulators, and analog peripheral functions to support small consumer motion-enabled systems. The 34921’s circuitry is fully protected with current limiting, short-circuit shutdown, overtemperature, overvoltage, and undervoltage detection. Supervisory functions can be read and programmed through a 8-MHz serial interface.
A 5.0 V dual-mode linear voltage regulator, 3.3 V switching buck regulator, and a voltage selectable (1.5 V, 1.8 V, 2.5 V) linear regulator provide power management. Two H-Bridges and a configurable motor driver are provided for controlling two dc motors and one unipolar stepper motor.
The highly integrated 34921 brings together sensing, communication, power management, system protection, and motor control in one device.
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