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APW704510KC-TR Datasheet(PDF) 1 Page - Anpec Electronics Coropration |
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APW704510KC-TR Datasheet(HTML) 1 Page - Anpec Electronics Coropration |
1 / 12 page Copyright ANPEC Electronics Corp. Rev.A.5 - Jan., 2003 APW7045 www.anpec.com.tw 1 ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. The APW7045 integrates PWM controller and linear controller, as well as the monitoring and protection functions into a single package, which provides two controlled power outputs with over-voltage and over- current protections. The PWM controller regulates the DDR termination voltage (1.25V) or GPU Voltage (2.05V) with a synchronous-rectified buck converter. The linear controller regulates the Memory Voltage (2.5V). The pre cision reference and voltage-mode PWM control provide ±1% static regulation. The lin- ear controller drives an external N-channel MOSFET to provide adjustable voltage. The APW7045 moni- tors two output voltages, and a single Power Good signal is issued when the PWM voltage is within ±10% of the DAC setting and the lineat regulator output level is above under-voltage threshold. Additional built-in over-voltage protection for the PWM output uses the lower MOSFET to prevent output voltages above 115 % of the DAC setting. The PWM over-current function monitors the output current by using the voltage drop across the upper MOSFET’s R DS(ON), eliminating the need for a current sensing resistor. Features ••••• 2 Regulated Voltage are provided −Switching Power for Fixed Voltage (1.0V) −Linear Regulator for VMEM(2.5V) ••••• Simple Single-Loop Control Design −Voltage-Mode PWM Control ••••• Excellent Output Voltage Regulation −PWM Output: ±1% −Linear Output: ±3% ••••• Fast Transient Response −High-Bandwidth Error Amplifier −Full 0% to 100% Duty Ratio ••••• Power-Good Output Voltage Monitor ••••• Over-Voltage and Over-Current Fault Monitors ••••• Small Converter Size −200KHz Free-Running Oscillator ; Progammable from 50KHz to 800KHz −Reduce External Component Count Applications ••••• Motherboard Power Regulation for Computers ••••• Low-Voltage Distributed Power Supplies ••••• VGA Card Power Regulation ••••• DDR SDRAM Power Regulation General Description Advanced PWM and Linear Power Controller Pin Description FB2 LG AT E OCSE T PG ND UG AT E PH AS E DR IVE VC C GND VS EN 1 FB1 CO M P 1 11 10 12 9 13 16 8 14 15 7 6 5 4 3 2 SD SS FAULT PG O O D |
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