APL5505 Datasheet PDF – 500mA, Regulator + Reset IC

Part Number: APL5505

Function: 3.4 V, 500 mA regulator + reset IC

Package: SOP-8, TSSOP-8 and MSOP-8 Type

Manufacturer: Anpec Electronics


APL5505 datasheet


The APL5505 / APL5506 / APL5507 is micropower, low noise , low drop out regulators with a reset function (regulator input (APL5505) or specific voltage(APL5506/7) monitoring), and internal delay circuit, set to detect 3.9V or 4.2V. Operate from 3V to 6V input voltage and deliver up to 500mA. Typical output noise is just 180uVRMSwith an external 0.01uF bypass capacitor connected in BP pin and the typical dropout voltage is only 300mV at 500mA loading. Design with an internal P-channel MOSFET pass transistor, the APL5505/6/7 maintains a low supply current, independent of the load current and dropout voltage. Other features include reverse current protection, thermal-shutdown protection, current limit protection to ensure specified output current and controlled short-circuit current.


• Low Quiescent Current : 120uA (No load)
• Low Dropout Voltage : 300mV (VOUT=3.3V@500mA)
• Stable with 4.7uF Output Capacitor
• Stable with Aluminum , Tantalum or Ceramic Capacitors .
• Reverse Current Protection
• No Protection Diodes Needed
• Built in Thermal Protection
• Built in Current Limit Protection
• Controlled Short Circuit Current : 50mA
• Fast transient Response
• Short Setting Time
• Adjustment-free Reset Detection Voltage : 3.9V or 4.2V typ.
•  Easy to Set Delay Time from Voltage Detection to Reset Release.
•  Reset and Reset output


• CD-ROM drive.

Other data sheets are available within the file:

APL5505A34KC-TR, APL5505A34KI-TR, APL-5505-A34OI-TR, APL-5505-A34XC-TR

APL5505 Datasheet PDF Download

APL5505 pdf

PCF1252-X Datasheet – Threshold Detector and Reset Generator

Part Number: PCF1252-X

Function: Threshold detector and reset generator

Package: DIP 8, SO 8 Pin type

Manufacturer: Philips Electronics ( https://www.nxp.com/ )


PCF1252-X datasheet



The PCF1252-X are low-power CMOS voltage threshold detectors designed especially for supervision of microcontroller/microprocessor systems for detection of power-on/off conditions and generation of a system reset pulse. The PCF1252-X also provides aPOWF (power fail) output which is activated at a precise factory-programmed trip point. A system RESET output has a built-in delay with duration determined by an external capacitor (CCT).
A second comparator (comparator 2) has been included to enable the possibility of a second monitoring point in the system.


1. Very low current consumption, typically 10 µA
2. 10 factory programmed threshold voltages available covering trip voltages from 4.75 to 2.55 V
3. ±50 mV trip point accuracy over full temperature range
4. Variable RESET delay
5. RESET pulse polarity selection
6. Defined outputs at 0.6 V (typ.)
7. Comparator for second level detection (e.g. overvoltage detection)
8. Advance warning of power fail


PCF1252-X Datasheet PDF Download

PCF1252-X pdf

Other data sheets are available within the file:

PCF1252, PCF1252X, PCF1252-XP, PCF1252-XT