APL5551 Datasheet PDF – Dual Channel Regulator

Part Number: APL5551

Function: Dual Channel 500mA/500mA Regulator + Reset IC

Package: SOP-8 Pin Type

Manufacturer: Anpec Electronics

Image and Pinouts:

APL5551 datasheet



The APL5551 is a dual-channel regulator with reset function (specific voltage monitoring), and internal delay circuit, set to detect 3.9V. Maximum input voltage is 6V, and both output1 and output2 can deliver up to 450mA. The typical dropout voltage of both channel is 500mV at 500mA loading. Design with an internal P-channel MOSFET pass transistor , the APL5551 maintains  a low  supply curr ent . Other feat ures include, thermal-shutdown protecti on,  current limit protection to ensure specified output current. The APL5551 comes in miniature SOP-8 and OP-8-P packages.


1. Low Quiescent Current : 110µA  (No load)

2. Low Dropout Voltage  :
(1) VDROP1 = 450mV @ 500mA
(2) VDROP2 = 500mV @ 500mA

3. Fixed Output Voltage :
(1) VOUT1 = 3.3V/500mA
(2) VOUT2 = 2.8V/500mA

4. Stable  with 4.7mF  Output  Ca pacitor

5. Stable  with  Aluminum,  Tantalum  or  Ceramic Capacitors

6. Built  in  Thermal  Protection

7. Fast  Transient Response

8. Short  Setting  Time

9. SOP-8, SOP-8-P  with  Thermal Pad Packages

10. Adjustment-free  Reset  Detection  Voltage :3.9V  typ

11. Easy  to Set  Delay  Time from  Voltage Detection to Reset Release

12. Lead Free Available (RoHS Compliant)


  1. Optical Storage System

Other data sheets are available within the file: APL5551K, APL5551KA

APL5551 Datasheet PDF Download

APL5551 pdf