Document
APW7015
Advanced PWM and Dual Linear Power Control
Features
•
3 Regulated Voltage are provided
General Description
The APW7015 integrates a PWM controller and Dual linear controller, as well as the monitoring and protection functions into a single package, which provides three controlled power outputs with over-voltage and over-current protections. The PWM controller regulates the DDR reference voltage with a synchronous-rectified buck converter. The linear controller regulates power for microprocessor core voltage and Memory Voltage. TTL Compatible 3-bit digital-to-analog converter (DAC) that adjusts the output voltage from 1.3VDC to 1.65VDC in 0.05V steps is included in APW7015. The precision reference and voltage-mode PWM control provide ±2% static regulation. The linear controller drives an external N-channel MOSFET to provide adjustable voltage. The APW7015 monitors all the output voltages, and a single Power Good signal is issued when the PWM Voltage is within 10% of the DAC setting and the other output levels are above their under-voltage thresholds. 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 RDS(ON) ,eliminating the need for a current sensing resistor.
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• Switching Power for VTT(1.25V) • Linear1 Regulator for FBVDDQ(2.5V) • Linear2 Regulator for NVVDD(2.05V)
Simple Single-Loop Control Design
• •
• Voltage-Mode PWM Control
Excellent Output Voltage Regulation
• PWM Output: ±2% Full Temperature • Linear Output: ±3% Full Temperature •
Fast Transient Response • High-Bandwidth Error Amplifier
• Full 0% to 100% Duty Ratio •
TTL-Compatible 3-Bit Digital-to-Analog Output Voltage Selection
• 0.05V Steps from 1.3VDC to 1.65VDC • Power-Good Output Voltage Monitor • Over-Voltage and Over-Current Fault • Monitors Small Converter Size • Constant Frequency Operation(200kHz) • Programmable Oscillator from 50kHz to
1MHz
Pin Description
VCC DRIVE2 NC NC VID2 VID1 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 UGATE PHASE LGATE PGND OCSET VSEN1 FB COMP VSEN3 DRIVE3 GND VAUX
• Reduce External Component Count
Applications
•
Motherboard Power Regulation for Computers
VID0 PGOOD VSEN2 SS FAULT NC
• Low-Voltage Distributed Power Supplies • VGA Card Power Regulation
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. Copyright ANPEC Electronics Corp. Rev. P.1 - Mar., 2001 1 www.anpec.com.tw
APW7015
Ordering Information
APW7015
Handling Code Temp. Range Package Code Package Code K : SOP - 24 Temp. Range C : 0 to 70 ° C Handling Code TU : Tube
TR : Tape & Reel
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Block Diagram
VSEN3 VAUX
Power-on Reset (POR)
VSEN1
OCSET
VCC.