8184 Datasheet | Allegro MicroSystems

LOW-DROPOUT, 3 V REGULATOR - HIGH EFFICIENCY Designed specifically to meet the requirement for extended operation of battery-powered equipment such as cordless and cellular telephones, the A8184SLT voltage regulator offers the reduced dropout voltage and quiescent current essential for maximum battery life. Applicable also to palmtop puters and personal data assistants, the device delivers a regulated, continuous 3 V output at up to 75 m A under normal operating conditions, or to 150 m A (transient) under worst-case conditions. A PMOS pass element provides a typical dropout voltage of only 90 m V at 60 m A of load current. The low dropout voltage permits deeper battery discharge before output regulation is lost. Furthermore, quiescent current does not increase as the dropout voltage is approached, an ideal feature in standby/resume power systems where data integrity is crucial. Regulator accuracy and excellent temperature characteristics are provided by a bandgap reference. This device is supplied in a small-outline plastic transistor package (SOT-89/TO-243AA) for surface-mount applications. The A8184SLT is rated for operation over a temperature range of -20°C to +85°C. A similar device with an ENABLE input for control over sequential power up, standby, or power down is the A8183SLU. Data Sheet...