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AP3583A (Obsolete)

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The AP3583/A is a simple single-phase synchronous buck controller. It operates from 5V or 12V supply voltage and delivers high quality output voltage as low as 0.6V. This device operates at fixed 200kHz (AP3583) or 300kHz (AP3583A) frequency and provides an optimum compromise between efficiency, external component size and cost. With integrated linear regulator bootstrap diode, and N-Channel MOSFET gate drives, the AP3583/A can reduce external component count and board space requirements. The AP3583/A supports both tracking mode and stand-alone mode operation. The output voltage is tightly regulated to the external reference voltage from 0.4V to 3V at tracking mode or internal 0.6V reference at stand-alone mode. Other features include internal soft-start, under voltage protection, over current protection and shutdown function. With aforementioned functions, this part provides customers a compact, high efficiency, well-protected and cost-effective solutions. The AP3583/A is available in PSOP-8 package.


  • Supply Voltage: 5V/12V
  • VIN Input Range: 3.0V to 13.2V
  • 0.6V to 80% of VIN Output Range
  • Internal Reference: 0.6V
  • Support Tracking Mode and Stand-alone Mode
  • Simple Single-loop Control
  • Voltage-mode PWM Control
  • Duty Cycle: 0% to 80%
  • Fast Transient Response
  • Fixed Oscillator Frequency: 200/300kHz
  • Lossless, Programmable Over Current Protection (Uses Lower MOSFET RDS(ON) )
  • Start-up into Pre-biased Output
  • Built-in Thermal Shutdown
  • Built-in Soft-start
  • Over Current/Voltage Protection
  • Under Voltage Protection
  • Integrated Boot Diode


  • Power Supplies for Microprocessors/Peripherals
  • PCs, Embedded Controllers, Memory Supplies
  • DSP and Core Communications Processor Supplies
  • Subsystem Power Supplies
  • PCI, AGP, Graphics Cards and Digital TV
  • SSTL-2 and DDR/2/3 SDRAM Bus Termination Supply
  • Cable Modems, Set Top Boxes, and DSL
  • Modems
  • Industrial Power Supplies and General Purpose Supplies
  • 5V/12V Input DC-DC Regulators
  • Low-voltage Distributed Power Supplies

Product Specifications

Product Parameters

Frequency (Hz) 300 Fixed
Type Buck
MinimumInput Voltage (V) 4.5 V
MaximumInput Voltage (V) 13.2 V
Output Voltage (V) 0.6 to ADJ V
Efficiency (%) 90 %

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Orderable Part Number Status Package Environmental Compliance Packing Request Samples
Qty. Carrier
AP3583AMPTR-G1 Obsolete SO-8 GREEN 4000 T&R

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free