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NCP5380 Dataheets PDF



Part Number NCP5380
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description Synchronous Buck Switching Regulator Controller
Datasheet NCP5380 DatasheetNCP5380 Datasheet (PDF)

NCP5380 7-Bit, Programmable, Single-Phase, Synchronous Buck Switching Regulator Controller General Description http://onsemi.com MARKING DIAGRAM 1 The NCP5380 is a highly efficient, single−phase, synchronous buck switching regulator controller. With its integrated drivers, the NCP5380 is optimized for converting the silver box voltage to the supply voltage required by high performance Intel chipsets. An internal 7−bit DAC is used to read a VID code directly from the chipset. www.DataSheet4U.com.

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NCP5380 7-Bit, Programmable, Single-Phase, Synchronous Buck Switching Regulator Controller General Description http://onsemi.com MARKING DIAGRAM 1 The NCP5380 is a highly efficient, single−phase, synchronous buck switching regulator controller. With its integrated drivers, the NCP5380 is optimized for converting the silver box voltage to the supply voltage required by high performance Intel chipsets. An internal 7−bit DAC is used to read a VID code directly from the chipset. www.DataSheet4U.com The NCP5380 uses a multimode architecture. It provides programmable switching frequency that can be optimized for efficiency depending on the output current requirement. In addition, the NCP5380 includes a programmable load line slope function to adjust the output voltage as a function of the load current so that the core voltage is always optimally positioned for a load transient. The NCP5380 also provides accurate and reliable current overload protection and a delayed power−good output. The IC supports on−the−fly output voltage changes requested by the chipset. The NCP5380 is specified over the extended commercial temperature range of 0°C to 85°C and is available in a 32−lead QFN. Features 1 32 QFN32, 5x5 CASE 488AM MN SUFFIX NCP5380 AWLYYWWG G NCP5380 = Specific Device Code A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb Free Package (Note: Microdot may be in either location) PIN CONFIGURATION EN VID1 VID2 VID3 VID4 VID5 VID6 VID7 PWRGD IMON N/C FBRTN FB COMP GND ILIM 1 NCP5380 (Top View) VCC BST DRVH SW PVCC DRVL PGND GND • Single−chip Solution • Fully Compatible with the Intel VR11 CPU Chipset Voltage • • • • • • • • • • • Regulator Specifications Integrated MOSFET Drivers ±8 mV Worst−case Differentially Sensed Core Voltage Error over Temperature Automatic Power−saving Modes Maximize Efficiency During Light Load Operation Soft Transient Control Reduces Inrush Current and Audio Noise Independent Current Limit and Load Line Setting Inputs for Additional Design Flexibility Built−in Power−good Masking Supports Voltage Identification (VID) On−the−fly Transients 7−bit, Digitally Programmable DAC Short−circuit Protection with Programmable Latch−off Delay Current Monitor Output Signal 32−lead QFN This is a Pb−Free Device ORDERING INFORMATION Device NCP5380MNR2G Package QFN−32 (Pb−Free) Shipping† 5000 / Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Applications • Desktop Power Supplies for Next−generation Intel Chipsets © Semiconductor Components Industries, LLC, 2009 May, 2009 − Rev. 0 1 IREF RPM RT RAMP LLINE CSREF CSFB CSCOMP Publication Order Number: NCP5380/D VID6 VID5 VID4 VID3 VID2 VID1 VID0 VR_ON PWRGD IMON C6 1m 24 VCC CBST 0 1m 23 22 RBST 21 20 19 18 17 AGND 33 AGND IREF RPM RT RAMP LLINE CSREF CSFB CSCOMP R2 10 Q1 V5S VDC Q1 5 6 7 8 5 6 7 8 4.7m C8 4 32 1 C1 C2 C3 C4 10m 10m 10m 10m 25V 25V 25V 25V EN VID1 VID2 VID3 VID4 VID5 VID6 VID7 RMON 4.53k PWRGD BST IMON DRVH NC SW FBRTN U1 PVCC FB NCP5380 DRVL COMP PGND AGND 4 32 1 10 mF x 7 C39 1 C28 CMON CA3 R22 2 R19 1n 20 0.01m 866 3 0.1m 4 1.00k 5 6 CA RB VCCSense 7 CFB 470p CB DNL 8 22p ILIM RA 20.0k 9 10 11 12 13 14 15 16 RLIM 10k Figure 1. Application Schematic VSSSense VOUT C33 32 31 30 29 28 27 26 25 L1 560 nH/0.8 mOhm 5 6 7 8 5 6 7 8 RSNB DNL 4 32 1 Q3 RCS1 RCS2 4 32 1 Q4 RPH CSNB DNL RTH1 8% NTC 100 kW C41 10 mF x 7 +C22 + C23 220m 220m 2.5V 2.5V + C30 220mF 2.5V JP1 SHORTPIN Connect Power Ground to Controller Ground under the controller VDC 1.00k R12 RREF RRPM 200k 80.6k RT 390k CCS2 CCS1 2.7n RRAMP 604k C27 1n 2.2n 54.9k 88.7k 100k www.DataSheet4U.com R24 DNL R23 0 R55 C26 1n 10 2 C47 http://onsemi.com NCP5380 NCP5380 GND VCC EN RPM RT RAMP BST Oscillator MOSFET Driver DRVH SW DRVL PGND OVP OCP Shutdown Delay Current Monitor Current Limit Circuit IMON − + COMP FB REF LLINE UVLO Shutdown and Bias VEA + + S + S − + CSREF _ DAC + 200 mV CSREF 1.55V − + − + PWRGD Start Up Delay www.DataSheet4U.com DAC − 300 mV PWRGD Open Drain + − CSREF CSFB CSCOMP ILIM PWRGD N/C Soft Transient Delay Delay Disable GND FBRTN Precision Reference VID DAC DAC VID7 VID6 VID5 VID4 VID3 VID2 VID1 IREF Soft Start and Soft Transient Control REF Figure 2. Functional Block Diagram ELECTRICAL CHARACTERISTICS VCC = 5 V, FBRTN = 112.5 mV, VVID = 1.25 V, TA = 0°C to 85°C, unless otherwise noted (Note 1). Current entering a pin (sunk by the device) has a positive sign. Parameter Symbol Conditions Min Typ Max Unit VOLTAGE CONTROL VOLTAGE ERROR AMPLIFIER (VEAMP) FB, LLINE Voltage Range (Note 2) FB, LLINE Offset Voltage (Note 2) FB LLINE Bias Current LLINE Positioning Accuracy VFB, VLLINE VOSVEA IFB ILLINE VFB − VDAC Measured on FB relative to nominal VDAC LLINE forced 80 mV below CSREF Voltage range of interest COMP = 2 V, CSREF = VDAC FB forced 200 mV below CSREF FB force.


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