Description

The CS5231-3 combines a threeterminal linear regulator with circuitry to control an external PFET transistor with the intent of managing two input supplies. A 5V supply powers the regulator while an auxiliary 3.3V supply is controlled by the IC. The design has been optimized to provide a “glitch-free” transition between the two supplies.

Features

Linear Regulator

■ 3.3V ± 2 Output Voltage

■ 3mA Quiescent Current @ 500mA

■ Fast Transient Response

■ Current Limit

■ Thermal Shutdown with Hysteresis

■ 450µA Reverse Output Current

■ Fast Transient Response

System Power Management

■ Auxiliary Supply Control