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CS5308

ON Semiconductor
Part Number CS5308
Manufacturer ON Semiconductor
Description Two-Phase PWM Controller
Published Jan 12, 2007
Detailed Description CS5308 Two−Phase PWM Controller with Integrated Gate Drivers for VRM 8.5 The CS5308 is a second−generation, two−phase s...
Datasheet PDF File CS5308 PDF File

CS5308
CS5308

Overview
CS5308 Two−Phase PWM Controller with Integrated Gate Drivers for VRM 8.
5 The CS5308 is a second−generation, two−phase step down controller that incorporates all control functions required to power next generation processors.
Proprietary multi−phase architecture guarantees balanced load current distribution and reduces overall solution cost in high current applications.
Enhanced V2™ control architecture provides the fastest possible transient response, excellent overall regulation, and ease of use.
The CS5308 is a second generation PWM controller because it optimizes transient response by combining traditional Enhanced V2 with an internal PWM ramp and fast−feedback directly from VCORE to the internal PWM comparator.
These enhancements provide greater design flexibility, facilitate use and reduce output voltage jitter.
The multi−phase architecture reduces input and output filter ripple, allowing for a significant reduction in filter size and inductor values with a corresponding increase in the output inductor current slew rate.
This approach allows a considerable reduction in input and output capacitor requirements, as well as reducing overall solution size and cost.
The CS5308 includes VTT monitoring and timing, VTT Power Good (VTTPGD), Power Good (PWRGD), and internal MOSFET gate drivers to provide a “fully integrated solution” to simplify design, minimize circuit board area, and reduce overall system cost.
Features • Enhanced V2 Control Method • Internal PWM Ramp • Fast−Feedback Directly from VCORE • 5−Bit DAC with 1% Tolerance • Adjustable Output Voltage Positioning • 200 kHz to 800 kHz Operation Set by Resistor • Current Sensed through Sense Resistors or Output Inductors • Adjustable Hiccup Mode Current Limit • Overvoltage Protection through Synchronous MOSFETs • Individual Current Limits for Each Phase • On−Board Current Share Amplifiers • 3.
3 V, 1.
0 mA Reference Output • VTT Monitoring and VTT Power Good (VTTPGD) • VCORE Power Good • On/Off Control (through CO...


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