Diodes Incorporated — Analog and discrete power solutions
SO 8

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SO 8EP

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AP3585C (Obsolete)

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Description

The AP3585A/B/C is a compact synchronous-rectified buck controller specifically designed to operate from 4.5V to 13.2V supply voltage and deliver high-quality output voltage as low as 0.8V (AP3585A) or 0.6V (AP3585B/C). This SO-8EP device operates at fixed 300kHz/200kHz frequency and provides an optimal level of integration to reduce size and cost of the power supply.
 
This controller integrates internal MOSFET drivers that support 12V+12V bootstrapped voltage for high- efficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count.
 
This controller provides single feedback loop, voltage-mode control with fast transient response. The error amplifier features a 10MHz gain-bandwidth product and 6V/μs slew rate which enables high converter bandwidth for fast transient performance.
 
Other features include internal soft-start, under voltage protection, over current protection and shutdown function. With afore-mentioned functions, this part provides customers a compact, high efficiency, well-protected and cost-effective solution.
 
The AP3585A/B/C is available in SO-8 and SO-8EP packages.

Feature(s)

  • Supply Voltage: 4.5V to 13.2V
    • VIN Input Range: 3.3V to 12V
    • 0.8V/0.6V to 80% of VIN Output Range
    • Internal Reference: 0.8V/0.6V
  • Simple Single-loop Control
    • Voltage-mode PWM Control
    • Duty Cycle: 0% to 80%
    • Fast Transient Response
  • 10MHz High-bandwidth Error Amplifier with 6V/μs Slew Rate
  • Fixed Oscillator Frequency: 300kHz/200kHz
  • Lossless, Programmable Over Current Protection (Uses Lower MOSFET RDS(ON))
  • Start-up into Pre-biased Load
  • Built-in Thermal Shutdown
  • Built-in Soft-start
  • Over Current Protection
  • Over Voltage Protection
  • Under Voltage Protection
  • Integrated Boot Diode
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Application(s)

  • Subsystem Power Supplies PCI, AGP, Graphics Cards, 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

Product Specifications

Product Parameters

Efficiency (%) 92
Frequency (Hz) 200K
MaximumInput Voltage (V) 13.2
MinimumInput Voltage (V) 4.5
Output Voltage (V) 0.6 to 10
Type Buck

Related Content

Packages

Technical Documents

Recommended Soldering Techniques

TN1.pdf