SEMTECH SC2643VX

SC2643VX Multi-Platform Multi-Phase PWM Controller POWER MANAGEMENT Description The SC2643VX provides a solution for microprocessor core load current on the ground plane. External offset is easy voltage regulation with up to 4 paralleled PWM channels. to achieve for any platforms and the VID settings. The The solution can also be configured as 2, 3, or 4-phase enable function is also provided to interface with the cor- form. This multi-phase buck regulator utilizes the phase- responding system signal for correct start up timing and shift timing control to allow interleaved switching of the shut down timing. power switches. This architecture minimizes the core volt- age ripple and the input current ripple, which leads to op- (Multiple Patents Pending) (Multiple Patents Pending) (Multiple Patents Pending) (Multiple Patents Pending) (Multiple Patents Pending) timized voltage regulator design for power density, tran- Features sient responses, and the thermal performances. ‹ VRD/VRM10.X, VRM9.X, and K-8 compliant To satisfy the highly dynamic nature of the modern micro- ‹ Core Voltage Set Point Accuracy 0.5% TM processors, the SC2643VX adopts peak current mode con- ‹ Combi-Sense Current Mode Control trol topology which ensures wide control loop bandwidth ‹ Intrinsic Phase Current Matching and fast transient responses. The current mode control ‹ Fast Transient Responses provides intrinsic phase current matching. The maximum ‹ Active Droop with Temperature Compensation to ripple frequency is greater than 2.8MHz. Meet Load Line Slope ‹ Support VID-on-Fly with 5 or 6 bit VID One of the outstanding features of the SC2643VX is its ‹ Enable Function for Power Sequencing voltage regulation accuracy. Not only does it provide bet- ‹ Cycle-by-Cycle Peak Current Limit ter than 0.5% set point accuracy, but also the accuracy to ‹ Intelligent Over Current Shut Down be fully compliant with stringent load line slope specifica- ‹ Over Voltage Protection When Using Semtech TM tions mandated by the modern microprocessors. Lossless Combi-Sense Driver output current sensing ensures the regulator output volt- ‹ Under Voltage Protection Built in age is accurately positioned according to the load current ‹ External programmable Soft-Start condition, and an internal temperature compensation tech- ‹ Externally programmable switching frequency (up to nology further enhances the performance of voltage accu- 2.8MHz output voltage ripple frequency) racy. ‹ 2, 3, or 4-Phase Configurations TM The patented Combi-Sense topology is employed by SC2643VX. The MOSFET R and the output inductor Applications ds(on) winding resistance are used to generate the phase current ‹ Voltage Regulator VRD/VRM10.X TM information. The Combi-Sense MOSFET driver plus the ‹ Voltage Regulator VRM9.X SC2643VX enables the complete solution. ‹ Voltage Regulator K-8 ‹ High Current, Low Voltage Step Down DC/DC The SC2643VX is a multi-platform controller. It conforms Converters TM to Intel VRM/VRD10.X, VRM9.X, and AMD K-8 (Opteron ) VID specifications. With very minor changes of the sche- matic and the layout, the SC2643VX based solution can be ported form one platform to another. This greatly ben- efits system manufactures by reducing design cycle times and streamlining inventory management. The SC2643VX supports VID-on-Fly applications for any platform. The cycle-by-cycle current limit plus the intelli- gent over current shut down provide the maximum versa- tility of the system without false tripping under all possible changes of VID and load conditions. The differential volt- age feedback sense eliminates the error caused by high May 11, 2005 1 www.semtech.com VIN ATX12V L1 ATX12V 1 2 1800uF/16V 640nH + C1 R1 D1 C3 C2 4.7uF/1206 2R2 AUX1 AUX2 AUX3 VOUT D1N4148 1uF M1 U1 PN3 R2 R3 R4 PN3 C4 R5 R6 L2 C5 1 2 AUX3 1 C6 1nF 9 R11 PGND R7 C7 R8 C8 R9 C9 R10 M2 M3 IR0 R12 100 C10 2.2nF U2 1 24 C11 C12 OS3 OS4 Note (3) 2 23 VCC 1uF 4.7uF OS2 OUTSEN VIN VRM_EN 3 22 OS1 OUT4 (Open Collector Input, No Pull-up) R13 D2 C13 1800uF/16V 4 21 BGOUT OUT3 C14 + 1.5K 5 20 D1N4148 1uF C15 ERROUT OUT2 VCC M4 4.7uF/1206 R15 R14 6 19 GNDSEN OUT1 C16 C18 0.1uF VCC 7 18 PN2 PN2 1uF FB AGND OFFSET+ R16 Rosc R17 L3 VOUT OFFSET- C17 8 17 C19 1 2 DACSTEP OSCREF AUX2 1 Note (4) 9 16 1nF 9 R18 VCC PGOOD PGND ATX12V 10 15 M5 M6 IR0 VID4 VID5 R20 11 14 R19 U3 VID3 VID0 100 C20 + Cout 10 C21 12 13 VID2 VID1 2.2nF Note (2) 4.7uF C22 C23 PGND SC2643VX 1uF 4.7uF VIN VID0 VID1 D3 C24 1800uF/16V VID2 C25 + D1N4148 1uF M7 C26 VID3 4.7uF/1206 VID4 V_CORE- PN1 PN1 DIFFERENTIAL PAIR R21 L4 FOR REMOTE SENSE V_CORE+ C27 1 2 AUX1 Pull-up Voltage 1 1nF 9 PGND VR10: 2V R22 Note (2) Note (1) M8 M9 VRM9.x: 5V IR0 R23 U4 K-8: 12V 100 C28 2.2nF R24 VID5 C29 C30 0R0 PWRGOOD (Open Collector Output) 1uF 4.7uF Notes: (1) Output filter design: Please follow guidelines issued by Intel and AMD. (2) Please follow guidelines issued by Intel and AMD. (3) Open collector/drain input, no pull-up. (4) Use the same power source as FET driver’s (SC1211). SC2643VX POWER MANAGEMENT Typical Application Circuit S C 1211 S C 1211 S C 121 1 5 4 5 4 5 4 VPN CO VPN CO VPN CO 6 3 6 3 6 3 VIN BST VIN BST VIN BST 7 2 7 2 7 2 VR EG TG VR EG TG VR EG TG 8 1 8 1 8 1 BG DRN BG DRN BG DRN  2005 Semtech Corp. 2 www.semtech.com SC2643VX POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Unless otherwise specified, all other voltages are referenced to AGND. Pl arameter Sm ymbo Ms aximu Unit VSV upply Voltage -V 0.3 to 20 CC CC Combi-Sense/Direct Output VoltageO5 S1, OS2, OS3, OS4, OUTSEN V V4 ID Pins Except VID5 V7 ID0 ~ VID V V5 ID5 VV ID -0.3 to+V 0.3 CC Oscillator Frequency Setting and OUT PinsO7 UT1, OUT2, OUT3, OSCREF V Ground Sense -V 0.3 to +0.3 GSENSE All Other Pins OV UT4, FB, DACSTEP -0.3 to+V 0.3 CC o Thermal Resistance of Junction to Case θ 15.6 C/W JC o AT mbient Temperature Range 0 to 105 C A o JT unction Temperature Range 0 to 125 C J o ST torage Temperature Range -65 to 150 C STG o LT ead Temperature (Soldering) 10 Sec. 260 C LEAD Electrical Characteristics o Unless specified: V = 12V, VID=1.30V (110110,VRD10) or 1.50V (101110,VRD10), F = 600kHz, T = 27 C. See Typical Application Circuit. CC OSC A Pl arameter Ss ymboTn est Condition Mp i Tx yMs a Unit Chip_Supply IV C Supply Voltage 72 .5 141V CC II C Supply Current 13 0 1A m CC UO VLO Ramp Up Ug VL V3 cc Risin 75 . 7V . UO VLO Ramp Down Ug VL V4 cc Fallin 65 .6V . Reference Section BV andgap Output C=5 4.7nF 20 .9425 .993V .03 BGOUT BGOUT Source Current 20 2030 0 33 µA SV upply Rejection =5 10.0V ~ 14.0V 0V . mV/ CC o o T0 emperature Stability C < T < 85C50% . A VID Step V5 RM9.X, K-8, LSB 2V m VID Step V5 RD/VRM10, LSB 1V 2. m V5 RD10 ; Internal offset=-20mV-5 0. +% 0. VV oltage Accuracy V1 RM9.x ; Internal offset=-20mV-1+% OUT K1 -8 ; Internal offset=+25mV -1+%  2005 Semtech Corp. 3 www.semtech.com SC2643VX POWER MANAGEMENT Electrical Characteristics (Cont.) o Unless specified: V = 12V, VID=1.30V (110110,VRD10) or 1.50V (101110,VRD10), F = 600kHz, T = 27 C. See Typical Application Circuit. CC OSC A Pl arameter Ss ymboTn est Condition Mp i Tx yMs a Unit Voltage Error Amplifier Input Offset Voltage ±3 mV Input Bias Current 2A 5 n OV pen Loop Gain 1V <<0 4V 8B d ERROUT UC nity Gain Bandwidth =0 10pF 1z MH ERROUT Slew Rate 1/ 0 V µs TG ransconductance Gain 0V .5 mA/ EA CV lamp Level for OCP 4V .4 eoMAX Clamp Level Accuracy -8 8 +% Current Sense Amplifiers Input Offset Voltage ±3 mV Input Bias Current 5A 0 n GG ain 1V 0 V/ CA CV MRR 00 to 3 8B d Input Common Mode Range -3 0.3 V Gain Match 2% Bandwidth 6z MH Power Good Threshold for Vcore Rising V0 ID - Power Good Threshold 20 5 30 5 4V 0 m Threshold for Vcore Falling V5 ID - Power Good Threshold 5V 7 m Output High Leakage Pwrgood = V 1A 00 n CC Output Low Sink P2 wrgood = 0.8V mA VIDs Input Low Voltage Threshold [2 VID0:5] 1V . Input High Voltage Threshold [8 VID0:5] 1. Bias Current [0 VID0:4]=0V 15 2 10 8 25 µA V5 ID5 Pull-up Voltage for VRD/VRM10 V8 ID 15 . 2V . V5 ID5 Pull-up voltage for VRM9.X V4 ID 6V V5 ID5 Pull-up voltage for K-8 V8 ID VV cc  2005 Semtech Corp. 4 www.semtech.com SC2643VX POWER MANAGEMENT Electrical Characteristics (Cont.) o Unless specified: V = 12V, VID=1.30V (110110,VRD10) or 1.50V (101110,VRD10), F = 600kHz, T = 27 C. See Typical Application Circuit. CC OSC A Pl arameter Ss ymboTn est Condition Mp i Tx yMs a Unit Oscillator Section OF scillator Frequency R=0 309K 50 4 60 0 6z 6 kH OSC OSC OF scillator Frequency Range 30 30 2z 80 kH OSC o o T0 emperature Stability C < T < 85 C ±5 % A 3-Phase Operation Output 4 pull up Threshold F5 or 3-phase operation 34 . 4V .5 Droop Amplifier GG ain 5V .4 V/ DA (1) Gain Accuracy % ±5 Current Limit Section Shutdown Voltage V0 ID - Shut Down Threshold 50 5 60 5 7V 5 m Dynamic VID Section SI inking Current of DACSTEP 3A 90 u DAC_SINK SI ourcing Current of DACSTEP 3A 40 u DAC_SRC NOTES: 1) Guaranteed by design, not tested in production. Specifications subject to change without notice.  2005 Semtech Corp. 5 www.semtech.com SC2643VX POWER MANAGEMENT Ordering Information Pin Configurations Top View Pe art NumberPT ackag Temp. Range ( ) J (1) O 1 24 OS 4 OS 3 SC2643VXTSTRT5 SSOP-24 0 to 12 C 2 23 OUT S E N OS 2 (1)(2) O SC2643VXTSTRTT5 SSOP-24 0 to 12 C OUT 4 3 22 OS 1 4 21 OUT 3 BG O U T Sd C2643VXEVB Evaluation Boar 5 20 OUT 2 ER R O U T Note: 6 19 OUT 1 G S E N SE (1) Only available in tape and reel packaging. A reel contains 2500 devices 7 18 AG N D FB for the TSSOP-24 package. 8 17 OS C R E F DA CST E P (2) Lead free package.Device is fully WEEE and RoHS compliant. 9 16 PG O O D V CC 10 15 VID 5 VID 4 11 14 VID 0 VID 3 12 13 VID 1 VID 2 (24-Pin TSSOP) Pin Descriptions Pe in#Pn in Nam Pin Functio 13O. S Combi-SenseCurrent 3 22 OS Combi-Sense Current 2. Connect to OUTSEN for 2 phase operation 31O. S Combi-Sense Current 1 4TB. GOU BG reference pin 5TE. RROU Error-amplifier output 6EG. SENS Remote sense for GND 7BF. Feedback pin 8PD. ACSTE VID step speed 9CV. C Power supply for chip 14 0V. ID VID MSB 13 1 VID 12 2 VID 11 3 VID 10 4V. ID VID LSB 15 5 VID VID 1/2 LSB / VID type select. VID5 pull-up to VCC for K-8; VID5 pull-up to 5V for VRM9.X. 1D 6P. GOO Power good 1F 7O. SCRE Oscillator frequency setting 1D 8A. GN Clean ground for analog 11 9O. UT PWM output1 22 0O. UT PWM output2 23 1O. UT PWM output3 24 2O. UT PWM output4. Connect to VCC for 3 phase operation 2N 3O. UTSE Direct output sense 24 4 OS Combi-Sense Current 4. Connect to OUTSEN for 2 or 3 phase operation.  2005 Semtech Corp. 6 www.semtech.com SC2643VX POWER MANAGEMENT Block Diagram C/A1 3 + OS1 DRV1 PWM1 OUT + - OUT R Q 19 OUT1 C/A2 - S 2 + OS2 DRV2 PWM2 OUT + - OUT R Q 20 OUT2 C/A3 - S 1 + OS3 DRV3 PWM3 OUT + - OUT R Q 21 OUT3 C/A4 - S 24 + OS4 DRV4 PWM4 OUT + - OUT R Q 22 OUT4 OUTSEN - S 23 OUTSEN Errout OSCILLATOR Ramp CLOCK DIVIDER 17 ROSC OSCREF OSC CLK P1 P2 P3 SEL3 P4 14 11111 + VID0 INHIBIT DAC OUT 3 PHASE 13 VID1 SELECT - 2R VID0 12 VID1 3/4 Phase selection VID2 VID2 VDAC - Threshold VID3 2R 11 VID4 OUT VID3 VID5 + 10 VID4 R 15 VID5 VBG PWR_GOOD 8 + 16 DACSTEP PWRGD OUT OUTSEN DROOP Power Good Threshold - R + OUT - E/A ERROUT 7 - FB R R OUT 5 ERROUT + OCP & R SHUTDOWM BGOUT - 4 OUT BGOUT BUFFER + 9 VCC VCC BANDGAP UVLO & VCC VREF 18 LATCH AGND BGOUT 6 GSEN GNDSEN VBG  2005 Semtech Corp. 7 www.semtech.com Shut Down SC2643VX POWER MANAGEMENT Applications Information- Output Voltage VRM9.X Output Voltage Vout Unless specified: 0 = GND; 1 = High (or Floating). T = 25°C, V = 12V A CC (V) V3 ID4 V2 ID V1 ID V0 ID VID 1 1 1 1 1 OFF 1 1 1 1 0 1.1 1 1 1 0 1 1.125 1 1 1 0 0 1.15 1 1 0 1 1 1.175 1 1 0 1 0 1.2 1 1 0 0 1 1.225 1 1 0 0 0 1.25 1 0 1 1 1 1.275 1 0 1 1 0 1.3 1 0 1 0 1 1.325 1 0 1 0 0 1.35 1 0 0 1 1 1.375 1 0 0 1 0 1.4 1 0 0 0 1 1.425 1 0 0 0 0 1.45 0 1 1 1 1 1.475 0 1 1 1 0 1.5 0 1 1 0 1 1.525 0 1 1 0 0 1.55 0 1 0 1 1 1.575 0 1 0 1 0 1.6 0 1 0 0 1 1.625 0 1 0 0 0 1.65 0 0 1 1 1 1.675 0 0 1 1 0 1.7 0 0 1 0 1 1.725 0 0 1 0 0 1.75 0 0 0 1 1 1.775 0 0 0 1 0 1.8 0 0 0 0 1 1.825 0 0 0 0 0 1.85  2005 Semtech Corp. 8 www.semtech.com SC2643VX POWER MANAGEMENT Applications Information- Output Voltage (Cont) VRD10 Output Voltage Vout Unless specified: 0 = GND; 1 = High. T = 25°C, V = 12V A CC (V) V4 ID5 V3 ID V2 ID V1 ID V0 ID VID 0 0 1 0 1 0 0.8375 1 0 1 0 0 1 0.8500 0 0 1 0 0 1 0.8625 1 0 1 0 0 0 0.8750 0 0 1 0 0 0 0.8875 1 0 0 1 1 1 0.9000 0 0 0 1 1 1 0.9125 1 0 0 1 1 0 0.9250 0 0 0 1 1 0 0.9375 1 0 0 1 0 1 0.9500 0 0 0 1 0 1 0.9625 1 0 0 1 0 0 0.9750 0 0 0 1 0 0 0.9875 1 0 0 0 1 1 1.0000 0 0 0 0 1 1 1.0125 1 0 0 0 1 0 1.0250 0 0 0 0 1 0 1.0375 1 0 0 0 0 1 1.0500 0 0 0 0 0 1 1.0625 1 0 0 0 0 0 1.0750 0 0 0 0 0 0 1.0875 1 1 1 1 1 1 OFF 0 1 1 1 1 1 OFF 1 1 1 1 1 0 1.1000 0 1 1 1 1 0 1.1125 1 1 1 1 0 1 1.1250 0 1 1 1 0 1 1.1375 1 1 1 1 0 0 1.1500 0 1 1 1 0 0 1.1625 1 1 1 0 1 1 1.1750 0 1 1 0 1 1 1.1875 1 1 1 0 1 0 1.2000 0 1 1 0 1 0 1.2125 1 1 1 0 0 1 1.2250 0 1 1 0 0 1 1.2375 1 1 1 0 0 0 1.2500 0 1 1 0 0 0 1.2625 1 1 0 1 1 1 1.2750 0 1 0 1 1 1 1.2875 1 1 0 1 1 0 1.3000 0 1 0 1 1 0 1.3125 1 1 0 1 0 1 1.3250 0 1 0 1 0 1 1.3375 1 1 0 1 0 0 1.3500 0 1 0 1 0 0 1.3625 1 1 0 0 1 1 1.3750 0 1 0 0 1 1 1.3875 1 1 0 0 1 0 1.4000 0 1 0 0 1 0 1.4125 1 1 0 0 0 1 1.4250 0 1 0 0 0 1 1.4375 1 1 0 0 0 0 1.4500 0 1 0 0 0 0 1.4625 1 0 1 1 1 1 1.4750 0 0 1 1 1 1 1.4875 1 0 1 1 1 0 1.5000 0 0 1 1 1 0 1.5125 1 0 1 1 0 1 1.5250 0 0 1 1 0 1 1.5375 1 0 1 1 0 0 1.5500 0 0 1 1 0 0 1.5625 1 0 1 0 1 1 1.5750 0 0 1 0 1 1 1.5875 1 0 1 0 1 0 1.6000  2005 Semtech Corp. 9 www.semtech.com SC2643VX POWER MANAGEMENT Applications Information- Output Voltage (Cont) K-8 Output Voltage Unless specified: 0 = GND; 1 = High (or Floating). T = 25°C, V = 12V A CC V3 ID4 V2 ID V1 ID V0 ID VV ID (V) OUT 00000 1.550 0000 1 1.525 000 1 0 1.500 000 11 1.475 00 1 0 0 1.450 00 1 0 1 1.425 00 11 0 1.400 00 111 1.375 0 1 000 1.350 01 0 0 1 1.325 01 01 0 1.300 01 01 1 1.275 01 1 0 0 1.250 01 1 0 1 1.225 0 111 0 1.200 0 1111 1.175 1 0000 1.150 1 000 1 1.125 10 0 1 0 1.100 10 0 1 1 1.075 10 10 0 1.050 10 10 1 1.025 10 1 1 0 1.000 1 0 111 0.975 11 000 0.950 11 00 1 0.925 11 0 1 0 0.900 11 0 1 1 0.875 111 00 0.850 111 0 1 0.825 1111 0 0.800 11111 OFF  2005 Semtech Corp. 10 www.semtech.com SC2643VX POWER MANAGEMENT Outline Drawing - TSSOP-24 DIMENSIONS A INCHES MILLIMETERS DIM D e MIN NOM MAX MIN NOM MAX - - - - A .047 1.20 N - - A1 .002 .006 0.05 0.15 - - A2 .031 .042 0.80 1.05 2X E/2 b .007 - .012 0.19 - 0.30 c - - .003 .007 0.09 0.20 E1 D .303 .307 .311 7.70 7.80 7.90 E E1 .169 .173 .177 4.30 4.40 4.50 PIN 1 INDICATOR E .252 BSC 6.40 BSC e .026 BSC 0.65 BSC L .018 .024 .030 0.45 0.60 0.75 3 L1 (.039) (1.0) ccc C 1 2 e/2 N 24 24 2X N/2 TIPS - - 01 0° 8° 0° 8° B aaa .004 0.10 bbb .004 0.10 ccc .008 0.20 D aaa C A2 A SEATING PLANE H C A1 bxN c bbb C A-B D GAGE PLANE 0.25 L 01 (L1) DETAIL A SEE DETAIL A SIDE VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A - AND -B - TO BE DETERMINED AT DATUM PLANE -H- 3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEDEC STD MO-153, VARIATION AD. Land Pattern - TSSOP-24 X DIMENSIONS DIM INCHES MILLIMETERS (.222) (5.65) C G .161 4.10 (C) G Z P .026 0.65 X .016 0.40 Y .061 1.55 Y Z .283 7.20 P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Contact Information Semtech Corporation Power Management Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804  2005 Semtech Corp. 11 www.semtech.com