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)
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Supply Voltage: 4.5V to 13.2V
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VIN Input Range: 3.3V to 12V
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0.8V/0.6V to 80% of VIN Output Range
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Internal Reference: 0.8V/0.6V
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Simple Single-loop Control
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Voltage-mode PWM Control
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Duty Cycle: 0% to 80%
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Fast Transient Response
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10MHz High-bandwidth Error Amplifier with 6V/μs Slew Rate
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Fixed Oscillator Frequency: 300kHz/200kHz
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Lossless, Programmable Over Current Protection (Uses Lower MOSFET RDS(ON))
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Start-up into Pre-biased Load
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Built-in Thermal Shutdown
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Built-in Soft-start
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Over Current Protection
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Over Voltage Protection
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Under Voltage Protection
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Integrated Boot Diode
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Totally Lead-Free & Fully RoHS Compliant
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Halogen and Antimony Free. “Green” Device
Application(s)
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Subsystem Power Supplies PCI, AGP, Graphics Cards, Digital TV SSTL-2 and DDR/2/3 SDRAM Bus Termination Supply
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Cable Modems, Set Top Boxes, and DSL Modems
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Industrial Power Supplies and General Purpose Supplies
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