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FAN5056MV85X

製品説明
仕様・特性

www.fairchildsemi.com FAN5056MV85 High Performance Programmable Synchronous DC-DC Controller for Multi-Voltage Platforms Features Description • Output programmable in 25mV steps from 1.05V to 1.825V using a dynamically programmable integrated 5-bit DAC • Controls adjustable linears for Vclock (2.5V), Vnorthbridge (1.8V) or Vagp (selectable 1.5V/3.3V), and Vadj (1.2V nominal) • Remote sense • Programmable Active Droop™ up to 200mV • Drives N-Channel MOSFETs • Overcurrent protection using MOSFET sensing • Overvoltage protection including startup • 85% efficiency typical at full load • Integrated Power Good and Enable/Soft Start functions • Meets Intel VRM8.5 specifications using minimum number of external components • 24 pin SOIC package The FAN5056 is a synchronous mode DC-DC controller IC which provides a highly accurate, programmable set of output voltages for multi-voltage platforms such as the Intel Pentium III, and provides a complete solution for all Intel VRM8.5 CPU applications, and for other high-performance processors. The FAN5056 features remote voltage sensing, independently adjustable current limit, and a proprietary wide-range Programmable Active Droop™ for optimal converter transient response and VRM8.5 compliance. The FAN5056 uses a 5-bit D/A converter to dynamically program the output voltage during operation from 1.05V to 1.825V in 25mV steps. The FAN5056 uses a high level of integration to deliver load currents in excess of 28A from a 5V source with minimal external circuitry. Synchronous-mode operation offers optimum efficiency over the entire specified output voltage range. An on-board precision low TC reference achieves 0.8% voltage regulation without expensive external components. The FAN5056 includes linear regulator controllers for Vclock (2.5V),Vnorthbridge (1.8V) or Vagp (selectable 1.5V/3.3V), and Vadjustable (1.2V nominal) each adjustable with an external divider. The FAN5056 also offers integrated functions Applications • Power supply for Pentium® III Platforms • VRM for Pentium III processor • Programmable multi-output power supply Block Diagram +3.3V +5V VCCA 21 +1.2V/Adj 9 + - RD PWRGD, OCL 10 VCCP 11 19 + REF OCL + - REF +12V PWRGD, OCL 12 +2.5V + OSC +5V 18 RS 20 24 VCCP 1 HIDRV + 15 14 V + Digital Control + 2 23 LODRV PWRGD, OCL 13 VCC 22 3.3/1.5V GNDP 5-Bit DAC 8 7 65 4 VID0 VID2 VID4 VID1 VID3 1.24V Reference Power Good 3 GNDA 17 PWRGD 16 ENABLE/SS Pentium is a registered trademark of Intel Corporation. Programmable Active Droop is a trademark of Fairchild Semiconductor. REV. 1.0.9 9/4/01 PRODUCT SPECIFICATION FAN5056MV85 Absolute Maximum Ratings Supply Voltage VCCP to GND 15V Supply Voltage VCCA to GND 13.5V Voltage Identification Code Inputs, VID0-VID4 VCCA All Other Pins 13.5V Junction Temperature, TJ 150°C Storage Temperature -65 to 150°C Lead Soldering Temperature, 10 seconds 300°C Thermal Resistance Junction-to-case, Θ 1JA 75°C/W Note 1: Component mounted on demo board in free air. Recommended Operating Conditions Parameter Conditions Min. Typ. Max. Units Supply Voltage VCCA 4.50 5 5.25 V Input Logic HIGH 2.0 V Input Logic LOW 0.8 Ambient Operating Temperature 70 0 Output Driver Supply, VCCP 10.8 12 V °C 13.2 V Electrical Specifications (VCCA = 5V, VCCP = 12V, VOUT = 1.425V, and TA = +25°C using circuits in Figure 1, unless otherwise noted.) The • denotes specifications which apply over the full operating temperature range. Parameter Conditions Min. Typ. Max. Units VCC Regulator Output Voltage See Table I FAN5056MV85 • 1.05 Output Current Output Temperature Drift TA = 0 to 70°C, VVID = 1.425V Line Regulation VIN = 4.75V to 5.25V A 1.453 1.465 1.477 V • -6 mV • +10 mV/V ILOAD = 0.8A, VVID = 1.425V Impedance3 ILOAD = 0.8A to 30A Maximum Programmable Droop Output Ripple 13.0 • Transient2 14.4 15.8 200 20MHz BW, ILOAD = 28A Total Output Variation, Steady State1 VVID = 1.425V3 Total Output Variation, V 28 Initial Voltage Setpoint Internal Droop 1.825 KΩ mV 20 mVpk Short Circuit Detect Current 1.360 1.490 V • 1.335 1.515 V • ILOAD = 0.8A to Imax, VVID = 1.425V • 45 60 µA 50 Efficiency ILOAD = 18A, VVID = 1.425V 83 % Output Driver Rise & Fall Time See Figure 3 50 nsec Output Driver Deadtime See Figure 3 50 nsec Duty Cycle 0 100 % V 5V UVLO • 3.76 4 4.24 12V UVLO • 7.65 8.5 9.35 V 17 µA Soft Start Current REV. 1.0.9 9/4/01 5 3

ブランド

FAIRCHILD

会社名

Fairchild Semiconductor International, Inc

本社国名

U.S.A

事業概要

アメリカ合衆国の半導体メーカー。世界で初めて半導体集積回路の商業生産を開始した企業である。後に同社からは様々な人材が独立、幾つかはインテルを始めとする世界的な半導体メーカーへと成長していった。

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