General Description
The APL5538 is a dual-channel regulator with reset function (specific voltage monitoring), and internal delay circuit, set to detect 3.9V or 4.2V. Maximum input voltage is 6V, output1 and output2 deliver up to 300mA. VOUT1 typical dropout voltage is 350mV at 300mA loading and VOUT2 typical dropout voltage is 350mV at 300mA loading. Design with an internal P-channel MOSFET pass transistor, the APL5538 maintains a low supply current. Other features include, thermal-shutdown protection, current limit protection to ensure specified output current. The APL5538 come in miniature SOP-8 and SOP-8-P packages.

Features
• Low Quiescent Current : 110mA (No load)
• Low Dropout Voltage :
   VDROP1=350mV@300mA
   VDROP2=350mV@300mA
• Fixed Output Voltage :
   VOUT1=3.3V/300mA
   VOUT2=3.3V/300mA
• Stable with 2.2mF Output Capacitor
• Stable with Aluminum, Tantalum or Ceramic
   Capacitors
• Built in Thermal Protection
• Fast Transient Response
• Short Setting Time
• SOP-8, SOP-8-P with Thermal Pad Packages
• Adjustment-free Reset Detection Voltage :
   3.9V or 4.2V typ
• Easy to Set Delay Time from Voltage
   Detection to Reset Release

Applications
• CD-ROM drive.