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FAN5019MTC Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FAN5019MTC Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 30 page www.fairchildsemi.com REV. 1.0.7 1/5/04 Features • Pin and Function Backward Compatible with FAN53168 and FAN53180 Controllers • Precision Multi-Phase DC-DC Core Voltage Regulation – ±10mV Output Voltage Accuracy Over Temperature • Differential Remote Voltage Sensing • Selectable 2, 3, or 4 Phase Operation • Selectable VRM9 or VRM10 Operation • Up to 1MHz per Phase Operation (4MHz ripple Frequency) • Lossless Inductor Current Sensing for Loadline Compensation – External Temperature Compensation • Accurate Load-Line Programming (Meets Intel® VRM/VRD10.0 and 10.X CPU Specifications) • Accurate Channel-Current Balancing for Thermal Optimization and Layout Compensation • Convenient 12V Supply Biasing • 6-bit Voltage Identification (VID) Input – .8375V to 1.600V in 12.5mV Steps – Dynamic VID Capability with Fault-Blanking for glitch-less Output voltage Changes • Adjustable Over Current Protection with Programmable Latch-Off Delay. Latch-Off Function may be Disabled •Over-Voltage Protection – Internal OVP Crowbar Protection Applications • Computer DC/DC Converter VRM/VRD10.0 • Computer DC/DC Converter VRM/VRD10.X • Computer DC/DC Converter VRM/VRD9.X • High Current, Low Voltage DC/DC Rail General Description The FAN5019 is a multi-phase DC-DC controller for imple- menting high-current, low-voltage, CPU core power regula- tion circuits. It is part of a chipset that includes external MOSFET drivers and power MOSFETS. The FAN5019 drives up to four synchronous-rectified buck channels in par- allel. The multi-phase buck converter architecture uses inter- leaved switching to multiply ripple frequency by the number of phases and reduce input and output ripple currents. Lower ripple results in fewer components, lower component cost, reduced power dissipation, and smaller board area. The FAN5019 features a high bandwidth control loop to provide optimal response to load transients. The FAN5019 senses current using lossless techniques: Phase current is measured through each of the output inductors. This current information is summed, averaged and used to set the loadline of the output via programmable "droop". The droop is tem- perature compensated to achieve precise loadline character- istics over the entire operating range. Additionally, individual phase current is measured using the RDS(ON) of the low-side MOSFETs. This information is used to dynam- ically balance/steer per-phase current. The phase currents are also summed and averaged for over-current detection. Dynamic-VID technology allows on-the-fly VID changes with controlled, glitch-less output. Additionally, short-circuit protection, adjustable current limiting, over-voltage protec- tion and power-good circuitry combine to ensure reliable and safe operation. The operating temperature range is 0°C to +85°C and the operating voltage is a single +12V supply, which simplifies the design. The FAN5019 is available in a TSSOP-28 package. Block Diagram FAN5019 V IN V IN Φ1 Φ4 V OUT Φ3 Φ2 FAN5009 FAN5009 FAN5019 6-Bit VID Controller 2-4 Phase VRM10.X Controller |
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