PDF NCP81243 Data sheet ( Hoja de datos )

Número de pieza	NCP81243
Descripción	Dual Output 3 & 2 Phase Controller
Fabricantes	ON Semiconductor
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No Preview Available ! NCP81243 Dual Output 3 & 2 Phase Controller with Single Intel Proprietary Interface for Desktop and Notebook CPU Applications www.onsemi.com The NCP81243 dual output three plus two phase buck solutions are optimized for Intel®’s IMVP8 CPUs. The NCP81243 offer five PWM drive signals that can be configured in multiple setups. The controller combines true differential voltage sensing, differential inductor DCR current sensing, input voltage feed−forward, and adaptive voltage positioning to provide accurately regulated power for both desktop and notebook applications. The control system is based on Dual−Edge pulse−width modulation (PWM) combined with DCR current sensing providing an ultra fast initial response to dynamic load events and reduced system cost. The NCP81243 provides the mechanism to shed phases during light load operation and can auto frequency scale in light load conditions while maintaining excellent transient performance. Dual high performance operational error amplifiers are provided to simplify compensation of the complete system. Patented Dynamic Reference Injection further simplifies loop compensation by eliminating the need to compromise between closed−loop transient response and Dynamic VID performance. Patented Total Current Summing provides highly accurate current monitoring for droop and digital current monitoring. MARKING DIAGRAM 1 52 QFN52 MN SUFFIX CASE 485BE NCP81243 FAWLYYWW G NCP81243 = Specific Device Code F = Wafer Fab A = Assembly Site WL = Lot ID YY = Year WW = Work Week G = Pb−Free Package ORDERING INFORMATION Device Package Shipping† NCP81243MNTXG QFN52 2500 / Tape & (Pb−Free) Reel Features • Meets Intel’s IMVP8 Specification • Current Mode Dual Edge Modulation for Fast Initial Response to Transient Loading †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. • Dual High Performance Operational Error Amplifier • One Digital Soft Start Ramp for Both Rails • Startup into Pre−Charged Loads while Avoiding False • Dynamic Reference Injection • Accurate Total Summing Current Amplifier • DAC with Droop Feed−forward Injection • Dual High Impedance Differential Voltage and Total OVP • Pin Programmable Power Saving Phase Shedding • Vin Feed Forward Ramp Slope • Over Voltage Protection (OVP) & Under Voltage Current Sense Amplifiers • Phase−to−Phase Dynamic Current Balancing • “Lossless” DCR Current Sensing for Current Balancing • Summed Compensated Inductor Current Sensing for Protection (UVP) • Over Current Protection (OCP) • Dual Power Good Output with Internal Delays • These Devices are Pb−Free, Halogen Free/BFR Free Droop and are RoHS Compliant • True Differential Current Balancing Sense Amplifiers for Each Phase • Adaptive Voltage Positioning (AVP) • Switching Frequency Range of 300 kHz – 1.4 MHz Applications • Desktop & Notebook Processors • Gaming © Semiconductor Components Industries, LLC, 2016 February, 2016 − Rev. 0 1 Publication Order Number: NCP81243/D 1 page NCP81243 TSENSEA TSENSE VRHOT VSN VSP DIFFOUT FB COMP ILIM IOUT CSSUM CSREF CSCOMP SDIO ALERT SCLK ADDR ADDRA CSN2A CSP2A CSN3 CSP3 CSN2 CSP2 CSN1 CSP1 THERMAL MONITOR UVLO & EN ENABLE VRDY DAC GND CSREF DIFFAMP ERROR AMP ENABLE VSP VSN DAC VSPA VSNA AUX DAC VR READY COMPARATOR AUX DIFFAMP VSNA VSPA CURRENT MEASUREMENT & LIMIT VSP VSN VSPA VSNA OVP OVP AUX OVPA OVP ERROR AMP CS AMP CURRENT MEASUREMENT & LIMIT ENABLE Intel propriFeAtaCrEy interface INTER DATA REGISTERS DAC DAC AUX DAC AUX DAC ADC VSP-VSN VSPA-VSNA TSENSE TSENSEA MUX IMAX IMAXA IOUT IOUTA ADDR ADDRA AUX CS AMP CURRENT BALANCE IPH2A IPH3 IPH2 IPH1 OVP COMP ENABLE PWM GENERATORS IPH1A CURRENT Sense RAMP1A RAMP1 RAMP2 RAMP3 RAMP2A ENABLE RAMP GENERATORS PWM GENERATOR OVP COMPA ENABLE NCP81243 DIFFOUTA FBA COMPA ILIMA IOUTA CSSUMA CSREFA CSCOMPA VBOOTA VBOOT CSN1A CSP1A POWER STATE STAGE POWER STATE STAGE Figure 4. 4 + 1 Block Diagram www.onsemi.com 5 5 Page NCP81243 Table 4. NCP81243 (3+2) ELECTRICAL CHARACTERISTICS Unless otherwise stated: −40°C < TA < 100°C; 4.75 V < VCC < 5.25 V; CVCC = 0.1 mF Parameter Test Conditions BIAS SUPPLY VCC Quiescent Current PS2 VCC Quiescent Current PS3 VCC Quiescent Current PS4 (25°C only) VCC Quiescent Current Enable low UVLO Threshold VCC rising VCC falling VCC UVLO Hysteresis VRMP Supply Range UVLO Threshold VRMP rising VRMP falling VCC UVLO Hysteresis DAC SLEW RATE Soft Start Slew Rate Slew Rate Slow Slew Rate Fast AUX Soft Start Slew Rate AUX Slew Rate Slow AUX Slew Rate Fast ENABLE INPUT Enable High Input Leakage Current Enable = 0 Upper Threshold Lower Threshold Enable Delay Time VUPPER VLOWER Measure time from Enable transitioning HI, VBOOT is not 0 V DRON Output High Voltage Sourcing 500 mA Output Low Voltage Sinking 500 mA Pull Up Resistances Rise/Fall Time CL (PCB) = 20 pF, DVo = 10% to 90% Internal Pull Down Resistance VCC = 0 V IOUT /IOUTA OUTPUT Input Referred Offset Voltage Output current max Ilimit to CSREF Ilimit sink current 80 mA Current Gain (Iout current)/(Ilimit Current) Rlim = 20 K, Riout = 5 K DAC = 0.8 V, 1.25 V, 1.52 V OSCILLATOR Switching Frequency Range Switching Frequency Accuracy 300 KHz < Fsw < 1.4 MHz 3 Phase Operation OUTPUT OVER VOLTAGE & UNDER VOLTAGE PROTECTION (OVP & UVP) Over Voltage Threshold During Soft−Start Min 4 4.5 3 −1 0.8 3.0 − − −3 − 9.5 300 −10 350 Typ Max Unit 50 mA 20 mA 230 mA 45 mA 4.5 V 200 mV 20 V 4.2 V 700 mV 1/2 SR Fast 1/2 SR Fast >10 1/2 SR Fast 1/2 SR Fast >10 mv/ms mv/ms mv/ms mv/ms mv/ms mv/ms 0 1.0 mA V 0.3 V 2.5 ms − −V − 0.1 V 2.0 kW 160 ns 70 kW +3 mV − 800 mA 10 10.5 − 1400 KHz − 10 % 390 430 kHz 2.5 V www.onsemi.com 11 11 Page

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