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Designed specifically to meet the requirement for extended opera-tion of battery-powered equipment such as cordless and cellular telephones, the A8183SLU voltage regulator offers the reduced dropout voltage and quiescent current essential for maximum battery life. Applicable also to palmtop computers and personal data assistants, the device delivers a regulated, continuous 3 V output at up to 75 mA under normal operating conditions, or to 150 mA (transient) under worst-case conditions.
A PMOS pass element provides a typical dropout voltage of only 90 mV at 60 mA 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 ap-proached, an ideal feature in standby/resume power systems wheredata integrity is crucial. Regulator accuracy and excellent temperature characteristics are provided by a bandgap reference. An ENABLE input gives the designer complete control over power up, standby, or power down.
This device is supplied in a 6-lead small-outline plastic package(similar to the SOT-89/TO-243AA) for surface-mount applications. TheA8183SLU is rated for operation over a temperature range of -20°C to+85°C.
* Output current rating is limited by inputDISCONT voltage, duty cycle, and ambient tempera-ture. Under any set of conditions, do not exceed a junction temperature of +150°C.- FOR See following pages. + Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These condi- tions can be tolerated but should be avoided.
8183 Features
High Efficiency Provides Extended Battery Life 90 mV Typical Dropout Voltage at IO = 60 mA 45 A Typical Quiescent Current at VI = 6 V Less Than 1 A "Sleep" Current Up to 150 mA Output Current CMOS-Compatible ON/OFF Control For Power-Up, Standby, or Shutdown UED PRODInternal Thermal Protection
8183 Typical Application
Cordless and Cellular Telephones Personal Data Assistants Personal Communicators Palmtop Computers