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AP3581BMP-G1 Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AP3581BMP-G1 Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 13 page  Data Sheet Single Phase Synchronous Buck PWM Controller AP3581A/B/C Oct. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 1 General Description The1AP3581A/B/C1is1a1compact1synchronous-rect ified buck controller specifically designed to operate from 5V/12V supply and deliver high-quality output voltage as low as 0.6V (AP3581A) or 0.8V (AP3581B/C). The AP3581A/B/C operates at fixed frequency of 300kHz (AP3581A/B) or 200kHz (AP3581C) 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 solutions. The AP3581A/B/C is available in PSOP-8 package. Features • Supply Voltage: 5V/12V • VIN Input Range: 3.0V to 13.2V • 0.6V/0.8V to 80% of VIN Output Range • Internal Reference: 0.6V/0.8V • 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 Output • Built-in Thermal Shutdown • Built-in Soft-start • Over Current/Voltage Protection • Under Voltage Protection • Integrated Boot Diode Applications • Power Supplies for Microprocessors/Peripherals • PCs, Embedded Controllers, Memory Supplies • DSP and Core Communications Processor Supplies • 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 • 5V/12V Input DC-DC Regulators • Low-voltage Distributed Power Supplies Figure 1. Package Type of AP3581A/B/C PSOP-8 |
Similar Part No. - AP3581BMP-G1 |
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Similar Description - AP3581BMP-G1 |
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