APW7026 Datasheet | Anpec Electronics Coropration

Advanced PWM and Dual Linear Power Control Features - 3 Regulated Voltage are provided - SYNC Switching Power for VTT(1.25V) - ASYNC Switching Power for NVVDD(2.05V) - Linear Regulator for FBVDDQ(2.5V) .. General Description The APW7026 Provides the power control and protection for three output voltages in VGA Card applications. It integrates two PWM controllers, one linear controller as well as the monitoring and protection functions into a single package. One PWM controller (PWM1) regulates the termination voltage VTT(1.25V) with a synchronous-rectified buck converter. The second PWM controller (PWM2) supplies the Core power NVVDD ( 2.05V ) with a standard buck converter . The linear controller regulates 2.5V power for FBVDDQ. The APW7026 can monitor all the output voltages (VTT ,NVVDD,FBVDDQ) and a single power good signal is issued when the VTT is within ± 10% of the reference voltage (VREF1) and the other levels are above its lower power good threshold voltage. Additional built-in overvoltage protection (OVP) will be started when the VTT output is above 118% of the VREF1.The OVP function will shutdown the upper MOSFET and turn on the lower MOSFET until the over-voltage is disappeared. The PWM controllers over-current function monitors the output current by sensing the voltage drop across the upper MOSFET r DS(ON), eliminating the need for a current sensing resistor. - - Simple Single-Loop Control Design - Voltage-Mode PWM Control Excellent Output Voltage Regulation - VTT Output: : ±1% Over Temperature : ±2% Over Temperature - NVVDD Output: - FBVDDQ Output:±2.5% Over Temperature - Fast Transient Response - On-Chip Feedback pensation - Full 0% to 100% Duty Ratio - Power-Good Output Voltage Monitor - Over-Voltage and Over-Current Fault Monitors - Small Converter Size - Constant Frequency Operation(200k Hz) - Programmable Oscillator from 50k Hz to 800KHz - Reduce External ponent Count Pin Description UGATE 1 1 2 3 4 5 6 7 8 9...