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CS5301GDWR32G

CS5301GDWR32G

  • 厂商:

    ONSEMI(安森美)

  • 封装:

    SOIC32

  • 描述:

    IC REG CTRLR BUCK 32SOIC

  • 数据手册
  • 价格&库存
CS5301GDWR32G 数据手册
ON Semiconductor Is Now To learn more about onsemi™, please visit our website at www.onsemi.com onsemi and       and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. onsemi reserves the right to make changes at any time to any products or information herein, without notice. The information herein is provided “as-is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by onsemi. “Typical” parameters which may be provided in onsemi data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and hold onsemi and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. Other names and brands may be claimed as the property of others. CS5301 Three−Phase Buck Controller with Integrated Gate Drivers and Power Good The CS5301 is a three−phase step down controller which incorporates all control functions required to power high performance processors and high current power supplies. Proprietary multi−phase architecture guarantees balanced load current distribution and reduces overall solution cost in high current applications. Enhanced V2t control architecture provides the fastest possible transient response, excellent overall regulation, and ease of use. The CS5301 multi−phase architecture reduces output voltage and input current ripple, allowing for a significant reduction in inductor values and a corresponding increase in inductor current slew rate. This approach allows a considerable reduction in input and output capacitor requirements, as well as reducing overall solution size and cost. Features • • • • • • • • • • • • • • http://onsemi.com MARKING DIAGRAM 32 SO−32WB CASE 751P DW SUFFIX CS5301 AWLYYWWG 1 32 A WL YY WW G 1 Enhanced V2 Control Method 5−Bit DAC with 1% Accuracy Adjustable Output Voltage Positioning 6 On−Board Gate Drivers 200 kHz to 800 kHz Operation Set by Resistor Current Sensed through Buck Inductors, Sense Resistors, or V−S Control Hiccup Mode Current Limit Individual Current Limits for Each Phase On−Board Current Sense Amplifiers 3.3 V, 1.0 mA Reference Output 5.0 V and/or 12 V Operation On/Off Control (through COMP Pin) Power Good Output Pb−Free Package is Available* = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package PIN CONNECTIONS 1 32 ROSC VCCL VCCL1 GATE(L)1 GND1 Gate(H)1 VCCH12 Gate(H)2 GND2 Gate(L)2 VCCL23 Gate(L)3 GND3 Gate(H)3 VCCH3 LGND COMP VFB VDRP CS1 CS2 CS3 CSREF PWRGD VID0 VID1 VID2 VID3 VID4 PWRGDS ILIM REF ORDERING INFORMATION Device © Semiconductor Components Industries, LLC, 2006 February, 2006 − Rev. 12 1 Shipping † CS5301GDW32 SO−32 22 Units/Rail CS5301GDWR32 SO−32 1000 Tape & Reel CS5301GDWR32G *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Package SO−32 1000 Tape & Reel (Pb−Free) †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. Publication Order Number: CS5301/D CS5301 +12 V +5.0 V +12 V D1 BAT54S D3 BAT54S L4 300 nH D2 BAS16LT1 C12 1.0 nF C1 1.0 mF R10 10 K C3 1.0 mF C2 1.0 mF +5.0 V C11 1.0 nF C4 R3 0.1 mF 56.2 K C10 470 pF R8 80.6 k COMP VFB VDRP CS1 CS2 CS3 CSREF PWRGD VID0 VID1 VID2 VID3 VID4 PWRGDS ILIM REF CS5301 R11 10 k +5.0 V PWRGD R12 20 K VID0 VID1 VID2 Q1 CS1 L1 R4 1.0 W C14 1.0 mF U1 R9 19.1 k + C15,16 2 × 16SP180M ROSC VCCL VCCL1 Gate(L)1 GND1 Gate(H)1 VCCH12 Gate(H)2 GND2 Gate(L)2 VCCL23 Gate(L)3 GND3 Gate(H)3 VCCH3 LGND 1.0 mF Q2 C17−24 8 × 4SP560M Q3 CS2 L2 1.0 mF Q4 C25−32 8 × 10 mF R1 VID3 VID4 Q5 C5 0.1 mF 3.09 k R2 CS3 L3 R7 R5 30 k R6 30 k C6 .01 mF CS1 VCORE 1.0 mF 1.40 k Q6 30 k C7 .01 mF CS3 C8 .01 mF CS2 C9 .01 mF Q1−Q6, NTB85N03 or NTB85N03T4 by ON Semiconductor Figure 1. Application Diagram for Intel Pentium® 4 Processor 12 V to 1.7 V, 42 A MAXIMUM RATINGS* Rating Value Unit 150 °C −65 to +150 °C ESD Susceptibility (Human Body Model) 2.0 kV Thermal Resistance, Junction−to−Case, RqJC 14 °C/W 70 °C/W 230 peak °C Operating Junction Temperature Storage Temperature Range Thermal Resistance, Junction−to−Ambient, RqJA Lead Temperature Soldering: Reflow: (SMD styles only) (Note 1) Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. 60 second maximum above 183°C. *The maximum package power dissipation must be observed. http://onsemi.com 2 CS5301 MAXIMUM RATINGS (continued) Pin Name Pin Symbol VMAX VMIN ISOURCE ISINK VCCL 16 V −0.3 V N/A 70 mA DC Power Good Sense PWRGDS 6.0 V −0.3 V 1.0 mA 1.0 mA Power Good Output PWRGD 6.0 V −0.3 V 1.0 mA 20 mA Return for Logic LGND N/A N/A 2.0 A, 1.0 ms 200 mA DC N/A Power for Gate(L)1 VCCL1 16 V −0.3 V N/A 1.5 A, 1.0 ms 200 mA DC Power for Gate(L)2 and Gate(L)3 VCCL23 16 V −0.3 V N/A 1.5 A, 1.0 ms 200 mA DC Power for Gate(H)1 and Gate(H)2 VCCH12 20 V −0.3 V N/A 1.5 A, 1.0 ms 200 mA DC Power for Gate(H)3 VCCH3 20 V −0.3 V N/A 1.5 A, 1.0 ms 200 mA DC Voltage Feedback Compensation Network COMP 6.0 V −0.3 V 1.0 mA 1.0 mA VFB 6.0 V −0.3 V 1.0 mA 1.0 mA Output for Adjusting Adaptive Voltage Positioning VDRP 6.0 V −0.3 V 1.0 mA 1.0 mA Frequency Resistor ROSC 6.0 V −0.3 V 1.0 mA 1.0 mA Reference Output REF 6.0 V −0.3 V 1.0 mA 50 mA High Side FET Drivers GH1−3 20 V −0.3 V DC −2.0 V for 100 ns 1.5 A, 1.0 ms 200 mA DC 1.5 A, 1.0 ms 200 mA DC Low Side FET Drivers GL1−3 16 V −0.3 V DC −2.0 V for 100 ns 1.5 A, 1.0 ms 200 mA DC 1.5 A, 1.0 ms 200 mA DC Return for #1 Driver GND1 0.3 V −0.3 V 2.0 A, 1.0 ms 200 mA DC N/A Return for #2 Driver GND2 0.3 V −0.3 V 2.0 A, 1.0 ms 200 mA DC N/A Return for #3 Driver GND3 0.3 V −0.3 V 2.0 A, 1.0 ms 200 mA DC N/A CS1−CS3 6.0 V −0.3 V 1.0 mA 1.0 mA ILIM 6.0 V −0.3 V 1.0 mA 1.0 mA Output Voltage CSREF 6.0 V −0.3 V 1.0 mA 1.0 mA Voltage ID DAC Inputs VID0−4 6.0 V −0.3 V 1.0 mA 1.0 mA Power for Logic Voltage Feedback Input Current Sense for Phases 1−3 Current Limit Set Point ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 8.0 V < VCCH < 20 V; CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RROSC = 53.6 k, CCOMP = 0.1 mF, CREF = 0.1 mF, DAC Code 10000, CVCC = 1.0 mF, ILIM ≥ 1.0 V; unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit ± 1.0 % Voltage Identification DAC (0 = Connected to GND; 1 = Open or Pullup to internal 3.3 V or external 5.0 V) Accuracy (all codes) VID code − 125 mV Connect VFB to COMP, Measure COMP − − VID4 VID3 VID2 VID1 VID0 VID Voltage DACOUT Voltage − 1 1 1 1 1 − FAULT Mode−Output Off − 1 1 1 1 0 1.100 0.965 0.975 0.985 V 1 1 1 0 1 1.125 0.990 1.000 1.010 V 1 1 1 0 0 1.150 1.015 1.025 1.035 V 1 1 0 1 1 1.175 1.040 1.050 1.061 V 1 1 0 1 0 1.200 1.064 1.075 1.086 V http://onsemi.com 3 CS5301 ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 8.0 V < VCCH < 20 V; CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RROSC = 53.6 k, CCOMP = 0.1 mF, CREF = 0.1 mF, DAC Code 10000, CVCC = 1.0 mF, ILIM ≥ 1.0 V; unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit Voltage Identification DAC (0 = Connected to GND; 1 = Open or Pullup to internal 3.3 V or external 5.0 V) 1 1 0 0 1 1.225 1.089 1.100 1.111 V 1 1 0 0 0 1.250 1.114 1.125 1.136 V 1 0 1 1 1 1.275 1.139 1.150 1.162 V 1 0 1 1 0 1.300 1.163 1.175 1.187 V 1 0 1 0 1 1.325 1.188 1.200 1.212 V 1 0 1 0 0 1.350 1.213 1.225 1.237 V 1 0 0 1 1 1.375 1.238 1.250 1.263 V 1 0 0 1 0 1.400 1.263 1.275 1.288 V 1 0 0 0 1 1.425 1.287 1.300 1.313 V 1 0 0 0 0 1.450 1.312 1.325 1.338 V 0 1 1 1 1 1.475 1.337 1.350 1.364 V 0 1 1 1 0 1.500 1.361 1.375 1.389 V 0 1 1 0 1 1.525 1.386 1.400 1.414 V 0 1 1 0 0 1.550 1.411 1.425 1.439 V 0 1 0 1 1 1.575 1.436 1.450 1.465 V 0 1 0 1 0 1.600 1.460 1.475 1.490 V 0 1 0 0 1 1.625 1.485 1.500 1.515 V 0 1 0 0 0 1.650 1.510 1.525 1.540 V 0 0 1 1 1 1.675 1.535 1.550 1.566 V 0 0 1 1 0 1.700 1.560 1.575 1.591 V 0 0 1 0 1 1.725 1.584 1.600 1.616 V 0 0 1 0 0 1.750 1.609 1.625 1.641 V 0 0 0 1 1 1.775 1.634 1.650 1.667 V 0 0 0 1 0 1.800 1.658 1.675 1.692 V 0 0 0 0 1 1.825 1.683 1.700 1.717 V 0 0 0 0 0 1.850 1.708 1.725 1.742 V Input Threshold VID4, VID3, VID2, VID1, VID0 1.00 1.25 1.50 V Input Pullup Resistance VID4, VID3, VID2, VID1, VID0 25 50 100 kW 3.15 3.30 3.45 V Pullup Voltage − Power Good Output Upper Threshold Force PWRGDS 1.9 (−5%) 2.0 2.1 (+5%) V Lower Threshold Force PWRGDS 0.95 × (VID −125 mV) or −2.6% from nominal PWRGD Threshold 0.975 × (VID −125 mV) VID −125 mV or +2.6% from nominal PWRGD Threshold V 0.926 0.951 0.975 V VID4 VID3 VID2 VID1 VID0 1 1 1 1 0 − http://onsemi.com 4 CS5301 ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 8.0 V < VCCH < 20 V; CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RROSC = 53.6 k, CCOMP = 0.1 mF, CREF = 0.1 mF, DAC Code 10000, CVCC = 1.0 mF, ILIM ≥ 1.0 V; unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit Power Good Output 1 1 1 0 1 − 0.950 0.975 1.000 V 1 1 1 0 0 − 0.974 1.000 1.025 V 1 1 0 1 1 − 0.998 1.024 1.050 V 1 1 0 1 0 − 1.021 1.048 1.075 V 1 1 0 0 1 − 1.045 1.073 1.100 V 1 1 0 0 0 − 1.069 1.097 1.125 V 1 0 1 1 1 − 1.093 1.122 1.150 V 1 0 1 1 0 − 1.116 1.146 1.175 V 1 0 1 0 1 − 1.140 1.170 1.200 V 1 0 1 0 0 − 1.164 1.195 1.225 V 1 0 0 1 1 − 1.188 1.219 1.250 V 1 0 0 1 0 − 1.211 1.243 1.275 V 1 0 0 0 1 − 1.235 1.268 1.300 V 1 0 0 0 0 − 1.259 1.292 1.325 V 0 1 1 1 1 − 1.283 1.316 1.350 V 0 1 1 1 0 − 1.306 1.341 1.375 V 0 1 1 0 1 − 1.330 1.365 1.400 V 0 1 1 0 0 − 1.354 1.389 1.425 V 0 1 0 1 1 − 1.378 1.414 1.450 V 0 1 0 1 0 − 1.401 1.438 1.475 V 0 1 0 0 1 − 1.425 1.463 1.500 V 0 1 0 0 0 − 1.449 1.487 1.525 V 0 0 1 1 1 − 1.473 1.511 1.550 V 0 0 1 1 0 − 1.496 1.536 1.575 V 0 0 1 0 1 − 1.520 1.560 1.600 V 0 0 1 0 0 − 1.544 1.584 1.625 V 0 0 0 1 1 − 1.568 1.609 1.650 V 0 0 0 1 0 − 1.591 1.633 1.675 V 0 0 0 0 1 − 1.615 1.658 1.700 V 0 0 0 0 0 − 1.639 1.682 1.725 V Switch Leakage Current PWRGD = 5.5 V PWRGDS = 1.60 V − 0.1 10.0 mA Delay PWRGDS low to PWRGD low 25 50 125 ms Output Low Voltage PWRGDS = 1.0 V IPWRGD = 4.0 mA − 0.15 0.40 V http://onsemi.com 5 CS5301 ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 8.0 V < VCCH < 20 V; CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RROSC = 53.6 k, CCOMP = 0.1 mF, CREF = 0.1 mF, DAC Code 10000, CVCC = 1.0 mF, ILIM ≥ 1.0 V; unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit Voltage Feedback Error Amplifier VFB Bias Current, (Note 2) 0.9 V < VFB < 1.8 V 5.5 6.0 6.5 mA COMP Source Current COMP = 0.5 V to 2.0 V; VFB = 1.6 V; DAC = 00000 15 30 60 mA COMP Sink Current COMP = 0.5 V to 2.0 V; VFB = 1.8 V; DAC = 00000 15 30 60 mA 0.20 0.27 0.34 V − 32 − mmho − 2.5 − MW COMP Discharge Threshold Voltage Transconductance − −10 mA < ICOMP < +10 mA Output Impedance − Open Loop DC Gain Note 3. 60 90 − dB Unity Gain Bandwidth 0.01 mF COMP Capacitor − 400 − kHz − 70 − dB PSRR @ 1.0 kHz − COMP Max Voltage VFB = 1.65 V COMP Open; DAC = 00000 2.4 2.7 − V COMP Min Voltage VFB = 1.8 V COMP Open; DAC = 00000 − 0.1 0.2 V − 2 5.0 10 mA Minimum Pulse Width Measured from CSx to GATE(H), V(VFB) = V(CSREF) = 0 V, V(COMP) = 0.5 V, 60 mV step applied between VCSX and VCREF − 350 515 ns Channel Startup Offset V(CS1) = V(CS2) = V(CS3) = V(VFB) = V(CSREF) = 0 V; Measure V(COMP) when GATE1(H), 2(H), 3(H) switch high 0.3 0.4 0.5 V Hiccup Latch Discharge Current PWM Comparators GATE(H) and GATE(L) High Voltage (AC) (Note 3). Measure VCCLX − GATE(L) or VCCHX − GATE(H) − 0 1.0 V Low Voltage (AC) (Note 3). Measure GATE(L) or GATE(H) − 0 0.5 V Rise Time GATE(H)x 1.0 V < GATE < 8.0 V; VCCHX = 10 V − 35 80 ns Rise Time GATE(L)x 1.0 V < GATE < 8.0 V; VCCLX = 10 V − 35 80 ns Fall Time GATE(H)x 8.0 V > GATE > 1.0 V; VCCHX = 10 V − 35 80 ns Fall Time GATE(L)x 8.0 V > GATE > 1.0 V; VCCLX = 10 V − 35 80 ns GATE(H) to GATE(L) Delay GATE(H) < 2.0 V, GATE(L) > 2.0 V 30 65 110 ns GATE(L) to GATE(H) Delay GATE(L) < 2.0 V, GATE(H) > 2.0 V 30 65 110 ns GATE Pull−down Force 100 mA into GATE Driver with VCCHX = VCCLX = 2.0 V − 1.2 1.6 V 2. The VFB Bias Current changes with the value of RROSC per Figure 4. 3. Guaranteed by design. Not tested in production. http://onsemi.com 6 CS5301 ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 8.0 V < VCCH < 20 V; CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RROSC = 53.6 k, CCOMP = 0.1 mF, CREF = 0.1 mF, DAC Code 10000, CVCC = 1.0 mF, ILIM ≥ 1.0 V; unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit Switching Frequency Measure any phase (RROSC = 32.4 k) (Note 4) 300 400 500 kHz Switching Frequency Measure any phase (RROSC = 53.6 k) 220 250 280 kHz Switching Frequency Measure any phase (RROSC = 16.2 k) (Note 4) 600 800 1000 kHz ROSC Voltage − − 1.00 − V Phase Delay − 105 120 135 deg Oscillator Adaptive Voltage Positioning VDRP Output Voltage to DACOUT Offset CS1 = CS2 = CS3 = CSREF, VFB = COMP, Measure VDRP− COMP −15 − 15 mV Maximum VDRP Voltage |(CS1 = CS2 = CS3) = CSREF| = 50 mV, VFB = COMP, |Measure VDRP− COMP| 360 465 570 mV − 2.7 3.1 3.5 V/V − − 0.6 2.0 mA − 0.2 2.0 mA 3.7 4.2 4.7 V/V −5.0 − 5.0 mV 0 − VCCL − 2.0 V Current Sense Amp to VDRP Gain Current Sensing and Sharing CSREF Input Bias Current CS1−CS3 Input Bias Current V(CSx) = V(CSREF) = 0 V Current Sense Amplifiers Gain − Current Sense Amp Mismatch 0 V ≤ (CSx−CSREF) ≤ 50 mV Current Sense Amplifiers Input Common Mode Range Limit (Note 4) Current Sense Input to ILIM Gain 0.25 V < ILIM < 1.20 V 5.0 6.5 8.0 V/V Current Limit Filter Slew Rate (Note 4) 4.0 10 26 mV/ms ILIM Bias Current 0 V < ILIM < 1.0 V − 0.1 1.0 mA − 75 90 115 mV (Note 4) 1.0 − − MHz 0 mA < I(VREF) < 1.0 mA 3.15 3.25 3.35 V Single Phase Pulse by Pulse Current Limit: V(CSx) − V(CSREF) Current Sense Amplifier Bandwidth Reference Output VREF Output Voltage 4. Guaranteed by design. Not tested in production. http://onsemi.com 7 CS5301 ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 8.0 V < VCCH < 20 V; CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RROSC = 53.6 k, CCOMP = 0.1 mF, CREF = 0.1 mF, DAC Code 10000, CVCC = 1.0 mF, ILIM ≥ 1.0 V; unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit General Electrical Specifications VCCL Operating Current VFB = COMP(no switching) − 22 26 mA VCCL1 Operating Current VFB = COMP(no switching) − 4.0 5.5 mA VCCL23 Operating Current VFB = COMP(no switching) − 8.0 11 mA VCCH12 Operating Current VFB = COMP(no switching) − 5.5 7.0 mA VCCH3 Operating Current VFB = COMP(no switching) − 2.5 3.5 mA VCCL Start Threshold GATEs switching, COMP charging 4.05 4.50 4.70 V VCCL Stop Threshold GATEs stop switching, COMP discharging 3.75 4.30 4.60 V VCCL Hysteresis GATEs not switching, COMP not charging 100 200 300 mV VCCH12 Start Threshold − 3.2 3.5 3.8 V VCCH12 Stop Threshold − 2.9 3.2 3.5 V VCCH12 Start Hysteresis − 200 300 400 mV http://onsemi.com 8 CS5301 PACKAGE PIN DESCRIPTION PACKAGE PIN # PIN SYMBOL FUNCTION 1 COMP 2 VFB Voltage Feedback Pin. To use Adaptive Voltage Positioning (AVP) select an offset voltage at light load and connect a resistor between VFB and VOUT. The input bias current of the VFB pin and the resistor value determine output voltage offset for zero output current. Short VFB to VOUT for no AVP. 3 VDRP Current sense output for AVP. The offset of this pin above the DAC voltage is proportional to the output current. Connect a resistor from this pin to VFB to set amount AVP or leave this pin open for no AVP. 4−6 CS1−CS3 7 CSREF 8 PWRGD Power Good Output. Open collector output goes low when CSREF is out of regulation. 9−13 VID4−VID0 Voltage ID DAC inputs. These pins are internally pulled up to 3.3 V if left open. 14 PWRGDS Power Good Sense. Connect to Output. 15 ILIM Sets threshold for current limit. Connect to reference through a resistive divider. 16 REF Reference output. Decouple with 0.1 mF to LGND. 17 LGND Return for internal control circuits and IC substrate connection. 18 VCCH3 Power for GATE(H)3. 19 Gate(H)3 20 GND3 21 Gate(L)3 22 VCCL23 23 Gate(L)2 Low side driver #2. 24 GND2 Return for #2 driver. 25 Gate(H)2 High side driver #2. 26 VCCH12 27 Gate(H)1 28 GND1 Return #1 drivers. 29 Gate(L)1 Low side driver #1. 30 VCCL1 Power for GATE(L)1. 31 VCCL Power for internal control circuits and UVLO Sense for Logic. 32 ROSC A resistor from this pin to ground sets operating frequency and VFB bias current. Output of the error amplifier and input for the PWM comparators. Current sense inputs. Connect current sense network for the corresponding phase to each input. Reference for current sense amplifiers. To balance input offset voltages between the inverting and noninverting inputs of the Current Sense Amplifiers, connect a resistor between CSREF and the output voltage. The value should be 1/3 of the value of the resistors connected to the CSx pins. High side driver #3. Return for #3 drivers. Low side driver #3. Power for GATE(L)2 and GATE(L)3. Power for GATE(H)1 and GATE(H)2. UVLO Sense for High Side Driver supply connects to this pin. High side driver #1. http://onsemi.com 9 CSREF CS3 CS2 CS1 PWRGDS PWRGD VID4 VID3 VID2 VID1 VID0 + ×4 CSA3 − + CSA2 − + CSA1 − S CO3 CO2 CO1 R RESC LGND DAC X 97.5 % − 2.0 V + − OVIC × 1.5 3.5 V 3.2 V + + + START STOP START STOP 4.5 V 4.3 V − − 125 mV − + DACOUT − + DLY FAULT DAC 3.3 V REF Set Dominant VCCH12 − 5.0 mA 2 FAULT − × 0.75 AVPA + 1 DACOUT VITotal 0.25 V + VDRP − + − − + − MAXC2 + 0.4 V − EA PH3 PH2 PH1 S R S R R OSC Current Source Gen PH 3 PH 2 PH 1 Gate Nonoverlap Gate Nonoverlap VCCH3 Gate Nonoverlap S VCCH12 VFB ROSC FAULT FAULT FAULT VCCL23 DACOUT MAXC3 + 0.4 V CO3 − + CO2 − − MAXC1 + 0.4 V CO1 + 2 FAULT 1 + PWMC3 − + PWMC2 COMP 0.4 V CO3 CO2 CO1 + PWMC1 − VCCL1 Reset Dominant Reset Dominant REF + − + − VCCL + 10 Reset Dominant − VCCL + http://onsemi.com + − Figure 2. Block Diagram − VCCL BIAS VCCL23 VCCH3 VCCL23 VCCH12 VCCL1 VCCH12 GND3 Gate(L)3 Gate(H)3 GND2 Gate(L)2 Gate(H)2 GND1 Gate(L)1 Gate(H)1 ILIM CS5301 CS5301 TYPICAL PERFORMANCE CHARACTERISTICS 900 25 VFB Bias Current, mA 800 Frequency, kHz 700 600 500 400 300 20 15 10 5 200 100 10 20 30 40 50 60 0 10 70 20 30 RROSC Value, kW 60 70 80 Figure 4. VFB Bias Current vs. RROSC Value 120 120 100 100 80 80 Time, ns Time, ns 50 RROSC Value, kW Figure 3. Oscillator Frequency 60 60 40 40 20 20 0 0 0 2 4 6 8 10 12 14 0 16 2 4 6 8 10 12 14 16 Load Capacitance, nF Load Capacitance, nF Figure 5. Gate(H) Rise−time vs. Load Capacitance measured from 1.0 V to 4.0 V with VCC at 5.0 V. Figure 6. Gate(H) Fall−time vs. Load Capacitance measured from 4.0 V to 1.0 V with VCC at 5.0 V. 120 120 100 100 80 80 Time, ns Time, ns 40 60 60 40 40 20 20 0 0 0 2 4 6 8 10 12 14 16 0 2 4 6 8 10 12 14 16 Load Capacitance, nF Load Capacitance, nF Figure 7. Gate(L) Rise−time vs. Load Capacitance measured from 4.0 V to 1.0 V with VCC at 5.0 V. Figure 8. Gate(L) Fall−time vs. Load Capacitance measured from 4.0 V to 1.0 V with VCC at 5.0 V. http://onsemi.com 11 CS5301 APPLICATIONS INFORMATION FIXED FREQUENCY MULTI−PHASE CONTROL current increases the voltage on the positive pin of the PWM comparator rises and terminates the PWM cycle. If the inductor starts the cycle with a higher current, the PWM cycle will terminate earlier providing negative feedback. The CS5301 provides a CSx input for each phase, but the CSREF, VFB and COMP inputs are common to all phases. Current sharing is accomplished by referencing all phases to the same VFB and COMP pins, so that a phase with a larger current signal will turn off earlier than phases with a smaller current signal. Including both current and voltage information in the feedback signal allows the open loop output impedance of the power stage to be controlled. If the COMP pin is held steady and the inductor current changes, there must also be a change in the output voltage. Or, in a closed loop configuration when the output current changes, the COMP pin must move to keep the same output voltage. The required change in the output voltage or COMP pin depends on the scaling of the current feedback signal and is calculated as In a multi−phase converter, multiple converters are connected in parallel and are switched on at different times. This reduces output current from the individual converters and increases the apparent ripple frequency. Because several converters are connected in parallel, output current can ramp up or down faster than a single converter (with the same value output inductor) and heat is spread among multiple components. The CS5301 uses a three−phase, fixed frequency, Enhanced V2 architecture. Each phase is delayed 120° from the previous phase. Normally GATE(H) transitions high at the beginning of each oscillator cycle. Inductor current ramps up until the combination of the current sense signal and the output ripple trip the PWM comparator and bring GATE(H) low. Once GATE(H) goes low, it will remain low until the beginning of the next oscillator cycle. While GATE(H) is high, the enhanced V2 loop will respond to line and load transients. Once GATE(H) is low, the loop will not respond again until the beginning of the next cycle. Therefore, constant frequency Enhanced V2 will typically respond within 1/3 of the off−time for a three−phase converter. The Enhanced V2 architecture measures and adjusts current in each phase. An additional input (CSx) for inductor current information has been added to the V2 loop for each phase as shown in Figure 9. SWNODE L RL CSX + CSA RS OFFSET CSREF + CSA Gain. V * VFB * VOFFSET Ipkout (per phase) + COMP RS CSA Gain + PWM COMP Figure 10 shows the step response of a single phase with the COMP pin at a fixed level. Before T1 the converter is in normal steady state operation. The inductor current provides the PWM ramp through the Current Share Amplifier. The PWM cycle ends when the sum of the current signal, voltage signal and OFFSET exceed the level of the COMP pin. At T1 the output current increases and the output voltage sags. The next PWM cycle begins and the cycle continues longer than previously while the current signal increases enough to make up for the lower voltage at the VFB pin and the cycle ends at T2. After T2 the output voltage remains lower than at light load and the current signal level is raised so that the sum of the current and voltage signal is the same as with the original load. In a closed loop system the COMP pin would move higher to restore the output voltage to the original level. VFB DACOUT DI The multi−phase power stage output impedance is the single−phase output impedance divided by the number of phases. The output impedance of the power stage determines how the converter will respond during the first few ms of a transient before the feedback loop has repositioned the COMP pin. The peak output current of each phase can also be calculated from; + + CSA Gain Single Stage Impedance + DVńDI + RS + + VOUT DV + RS The single−phase power stage output impedance is: E.A. + COMP Figure 9. Enhanced V2 Feedback and Current Sense Scheme The inductor current is measured across RS, amplified by CSA and summed with the OFFSET and Output Voltage at the non−inverting input of the PWM comparator. The inductor current provides the PWM ramp and as inductor http://onsemi.com 12 CS5301 considered when setting the ILIM threshold. If a more accurate current sense is required than inductive sensing can provide, current can be sensed through a resistor as shown in Figure 9. SWNODE Current Sharing Accuracy VFB (VOUT) PCB traces that carry inductor current can be used as part of the current sense resistance depending on where the current sense signal is picked off. For accurate current sharing, the current sense inputs should sense the current at the same point for each phase and the connection to the CSREF should be made so that no phase is favored. (In some cases, especially with inductive sensing, resistance of the pcb can be useful for increasing the current sense resistance.) The total current sense resistance used for calculations must include any pcb trace between the CSx inputs and the CSREF input that carries inductor current. Current Sense Amplifier Input Mismatch and the value of the current sense element will determine the accuracy of current sharing between phases. The worst case Current Sense Amplifier Input Mismatch is 5.0 mV and will typically be within 3.0 mV. The difference in peak currents between phases will be the CSA Input Mismatch divided by the current sense resistance. If all current sense elements are of equal resistance a 3.0 mV mismatch with a 2.0 mW sense resistance will produce a 1.5 A difference in current between phases. CSA Out COMP − Offset CSA Out + VFB T1 T2 Figure 10. Open Loop Operation Inductive Current Sensing For lossless sensing, current can be sensed across the inductor as shown in Figure 11. In the diagram L is the output inductance and RL is the inherent inductor resistance. To compensate the current sense signal the values of R1 and C1 are chosen so that L/RL = R1 × C1. If this criteria is met the current sense signal will be the same shape as the inductor current, the voltage signal at CSx will represent the instantaneous value of inductor current and the circuit can be analyzed as if a sense resistor of value RL was used as a sense resistor (RS). Operation at > 50% Duty Cycle For operation at duty cycles above 50% Enhanced V2 will exhibit subharmonic oscillation unless a compensation ramp is added to each phase. A circuit like the one on the left side of Figure 12 can be added to each current sense network to implement slope compensation. The value of R1 can be varied to adjust the ramp size. R1 SWNODE CSX L C1 RL VOUT + CSA OFFSET CSREF + + + + PWM COMP DACOUT Switch Node Gate(L)X VFB E.A. + COMP R1 3.0 k Figure 11. Lossless Inductive Current Sensing with Enhanced V2 25 k CSX 1.0 nF When choosing or designing inductors for use with inductive sensing tolerances and temperature effects should be considered. Cores with a low permeability material or a large gap will usually have minimal inductance change with temperature and load. Copper magnet wire has a temperature coefficient of 0.39% per °C. The increase in winding resistance at higher temperatures should be 0.1 mF .01 mF CSREF MMBT2222LT1 Slope Comp Circuit Existing Current Sense Circuit Figure 12. External Slope Compensation Circuit http://onsemi.com 13 CS5301 Ramp Size and Current Sensing Because the current ramp is used for both the PWM ramp and to sense current, the inductor and sense resistor values will be constrained. A small ramp will provide a quick transient response by minimizing the difference over which the COMP pin must travel between light and heavy loads, but a steady state ramp of 25 mVp−p or greater is typically required to prevent pulse skipping and minimize pulse width jitter. For resistive current sensing, the combination of the inductor and sense resistor values must be chosen to provide a large enough steady state ramp. For large inductor values the sense resistor value must also be increased. For inductive current sensing, the RC network must meet the requirement of L/RL = R × C to accurately sense the AC and DC components of the current the signal. Again the values for L and RL will be constrained in order to provide a large enough steady state ramp with a compensated current sense signal. A smaller L, or a larger RL than optimum might be required. But unlike resistive sensing, with inductive sensing, small adjustments can be made easily with the values of R and C to increase the ramp size if needed. If RC is chosen to be smaller (faster) than L/RL, the AC portion of the current sensing signal will be scaled larger than the DC portion. This will provide a larger steady state ramp, but circuit performance will be affected and must be evaluated carefully. The current signal will overshoot during transients and settle at the rate determined by R × C. It will eventually settle to the correct DC level, but the error will decay with the time constant of R × C. If this error is excessive it will effect transient response, adaptive positioning and current limit. During transients the COMP pin will be required to overshoot along with the current signal in order to maintain the output voltage. The VDRP pin will also overshoot during transients and possibly slow the response. Single phase overcurrent will trip earlier than it would if compensated correctly and hiccup mode current limit will have a lower threshold for fast rise step loads than for slowly rising output currents. The waveforms in Figure 13 show a simulation of the current sense signal and the actual inductor current during a positive step in load current with values of L = 500 nH, RL = 1.6 mW, R1 = 20 k and C1 = .01 mF. For ideal current signal compensation the value of R1 should be 31 kW. Due to the faster than ideal RC time constant there is an overshoot of 50% and the overshoot decays with a 200 ms time constant. With this compensation the ILIM pin threshold must be set more than 50% above the full load current to avoid triggering hiccup mode during a large output load step. Figure 13. Inductive Sensing waveform during a Step with Fast RC Time Constant (50 ms/div) Current Limit Two levels of overcurrent protection are provided. Any time the voltage on a Current Sense pin exceeds CSREF by more than the Single Phase Pulse by Pulse Current Limit, the PWM comparator for that phase is turned off. This provides fast peak current protection for individual phases. The outputs of all the currents are also summed and filtered to compare an averaged current signal to the voltage on the ILIM pin. If this voltage is exceeded, the fault latch trips and the Soft Start capacitor is discharged by a 5.0 mA source until the COMP pin reaches 0.2 V. Then Soft Start begins. The converter will continue to operate in this mode until the fault condition is corrected. Overvoltage Protection Overvoltage protection (OVP) is provided as a result of the normal operation of the Enhanced V2 control topology with synchronous rectifiers. The control loop responds to an overvoltage condition within 400 ns, causing the top MOSFET’s to shut off and the synchronous MOSFET’s to turn on. This results in a “crowbar” action to clamp the output voltage and prevent damage to the load. The regulator will remain in this state until the overvoltage condition ceases or the input voltage is pulled low. http://onsemi.com 14 CS5301 UVLO voltage is not repositioned quickly enough after current is stepped up and the upper limit is exceeded. The CS5301 has undervoltage lockout functions connected to two pins. One intended for the logic and low−side drivers with a 4.5 V turn−on threshold is connected to the VCCL pin. A second for the high side drivers has a 3.5 V threshold and is connected to the VCCH12 pin. The UVLO threshold for the high side drivers was chosen at a low value to allow for flexibility in the part. In many applications this function will be disabled or will only check that the applicable supply is on − not that is at a high enough voltage to run the converter. For the 12 VIN converter (see Figure 1) the UVLO pin for the high side driver is pulled up by the 5.0 V supply (through two diode drops) and the function is not used. The diode between the COMP pin and the 12 V supply holds the COMP pin near GND and prevents start−up while the 12 V supply is off. In an application where a higher UVLO threshold is necessary a circuit like the one in Figure 15 will lock out the converter until the 12 V supply exceeds 8.0 V. Normal Fast Adaptive Positioning Slow Adaptive Positioning Limits Figure 14. Adaptive Positioning The CS5301 uses two methods to provide fast and accurate adaptive positioning. For low frequency positioning the VFB and VDRP pins are used to adjust the output voltage with varying load currents. For high frequency positioning, the current sense input pins can be used to control the power stage output impedance. The transition between fast and slow positioning is adjusted by the error amp compensation. The CS5301 can be configured to adjust the output voltage based on the output current of the converter, as shown in Figure 1. To set the no−load positioning, a resistor (R9) is placed between the output voltage and VFB pin. The VFB bias current will develop a voltage across the resistor to decrease the output voltage. The VFB bias current is dependent on the value of RROSC, as shown in Figure 4. During no load conditions the VDRP pin is at the same voltage as the VFB pin, so none of the VFB bias current flows through the VDRP resistor (R8). When output current increases the VDRP pin increases proportionally and the VDRP pin current offsets the VFB bias current and causes the output voltage to further decrease. The VFB and VDRP pins take care of the slower and DC voltage positioning. The first few ms are controlled primarily by the ESR and ESL of the output filter. The transition between fast and slow positioning is controlled by the ramp size and the error amp compensation. If the ramp size is too large or the error amp too slow there will be a long transition to the final voltage after a transient. This will be most apparent with lower capacitance output filters. Note: Large levels of adaptive positioning can cause pulse width jitter. VID Codes and Power Good The internal VID and DACOUT levels are set up so that the reference for the control loop is nominally 125 mV below the VID code (see the block diagram). The nominal lower Power Good threshold is 2.5% below the DACOUT level. The nominal upper Power Good threshold is fixed at 2.0 V for all VID codes. This scheme is intended to select the VID level as the maximum output voltage and the DACOUT level as the minimum output voltage. TRANSIENT RESPONSE AND ADAPTIVE POSITIONING For applications with fast transient currents the output filter is frequently sized larger than ripple currents require in order to reduce voltage excursions during transients. Adaptive voltage positioning can reduce peak−peak output voltage deviations during load transients and allow for a smaller output filter. The output voltage can be set higher at light loads to reduce output voltage sag when the load current is stepped up and set lower during heavy loads to reduce overshoot when the load current is stepped up. For low current applications a droop resistor can provide fast accurate adaptive positioning. However, at high currents the loss in a droop resistor becomes excessive. For example; in a 50 A converter a 1.0 mW resistor to provide a 50 mV change in output voltage between no load and full load would dissipate 2.5 Watts. Lossless adaptive positioning is an alternative to using a droop resistor, but must respond quickly to changes in load current. Figure 14 shows how adaptive positioning works. The waveform labeled normal shows a converter without adaptive positioning. On the left, the output voltage sags when the output current is stepped up and later overshoots when current is stepped back down. With fast (ideal) adaptive positioning the peak to peak excursions are cut in half. In the slow adaptive positioning waveform the output Error Amp Compensation The transconductance error amplifier can be configured to provide both a slow soft−start and a fast transient response. C4 in Figure 1 controls soft−start. A 0.1 mF capacitor with the 30 mA error amplifier output capability will allow the output to ramp up at 0.3 V/ms or 1.5 V in 5.0 ms. R10 is connected in series with C4 to allow the error amplifier to slew quickly over a narrow range during load transients. Here the 30 mA error amplifier output capability http://onsemi.com 15 CS5301 Voltage feedback should be taken from a point of the output or the output filter that doesn’t favor any one phase. If the feedback connection is closer to one inductor than the others the ripple associated with that phase may appear larger than the ripple associated with the other phases and poor current sharing can result. The current sense signal is typically tens of milli−volts. Noise pick−up should be avoided wherever possible. Current feedback traces should be routed away from noisy areas such as switch nodes and gate drive signals. The paths should be matched as well as possible. It is especially important that all current sense signals be picked off at similar points for accurate current sharing. If the current signal is taken from a place other than directly at the inductor any additional resistance between the pick−off point and the inductor appears as part of the inherent inductor resistance and should be considered in design calculations. Capacitors for the current feedback networks should be placed as close to the current sense pins as practical. works against 10 kW (R10) to limit the window of fast slewing to 300 mV − enough to allow for fast transients, but not enough to interfere with soft−start. This window will be noticeable as a step in the COMP pin voltage at startup. The size of this step must be kept smaller than the Channel Startup Offset (nominally 0.4 V) for proper soft−start operation. If adaptive positioning is used the R9 and R8 form a divider with the VDRP end held at the DAC voltage during startup, which effectively makes the Channel Startup Offset larger. C12 is included for error amp stability. A capacitive load is required on the error amp output. Use of values less than 1.0 nF may result in error amp oscillation of several MHz. C11 and the parallel resistance of the VFB resistor (R9) and the VDRP resistor (R8) are used to roll off the error amp gain. The gain is rolled off at high enough frequency to give a quick transient response, but low enough to cross zero dB well below the switching frequency to minimize ripple and noise on the COMP pin. +12 V DESIGN PROCEDURE +5.0 V Current Sensing, Power Stage and Output Filter Components 50 k 1. Choose the output filter components to meet peak transient requirements. The formula below can be used to provide an approximate starting point for capacitor choice, but will be inadequate to calculate actual values. COMP 100 k 100 k DVPEAK + (DIńDT) ESL ) DI ESR Ideally the output filter should be simulated with models including ESR, ESL, circuit board parasitics and delays due to switching frequency and converter response. Typically both bulk capacitance (electrolytic, Oscon, etc.,) and low impedance capacitance (ceramic chip) will be required. The bulk capacitance provides “hold up” during the converter response. The low impedance capacitance reduces steady state ripple and bypasses the bulk capacitance during slewing of output current. 2. For inductive current sensing (only) choose the current sense network RC to provide a 25 mV minimum ramp during steady state operation. Figure 15. External UVLO Circuit Layout Guidelines With the fast rise, high output currents of microprocessor applications, parasitic inductance and resistance should be considered when laying out the power, filter and feedback signal sections of the board. Typically, a multi−layer board with at least one ground plane is recommended. If the layout is such that high currents can exist in the ground plane underneath the controller or control circuitry, the ground plane can be slotted to reroute the currents away from the controller. The slots should typically not be placed between the controller and the output voltage or in the return path of the gate drive. Additional power and ground planes or islands can be added as required for a particular layout. Output filter components should be placed on wide planes connected directly to the load to minimize resistive drops during heavy loads and inductive drops and ringing during transients. If required, the planes for the output voltage and return can be interleaved to minimize inductance between the filter and load. R + (VIN * VOUT) f VOUTńVIN C 25 mV Then choose the inductor value and inherent resistance to satisfy L/RL = R × C. For ideal current sense compensation the ratio of L and RL is fixed, so the values of L and RL will be a compromise typically with the maximum value RL limited by conduction losses or inductor temperature rise and the minimum value of L limited by ripple current. http://onsemi.com 16 CS5301 Adaptive Positioning 3. For resistive current sensing choose L and RS to provide a steady state ramp greater than 25 mV. LńRS + (VIN * VOUT) 7. To set the amount of voltage positioning above the DAC setting at no load connect a resistor (RVFB) between the output voltage and the VFB pin. Choose RVFB as; VOUTńVIN f 25 mV Again the ratio of L and RL is fixed and the values of L and RS will be a compromise. 4. Calculate the high frequency output impedance (ConverterZ) of the converter during transients. This is the impedance of the Output filter ESR in parallel with the power stage output impedance (PwrstgZ) and will indicate how far from the original level (DVR) the output voltage will typically recover to within one switching cycle. For a good transient response DVR should be less than the peak output voltage overshoot or undershoot. DVR + ConverterZ RVFB + NL PositionńVFB Bias Current See Figure 4 for VFB Bias Current. 8. To set the difference in output voltage between no load and full load, connect a resistor (RVDRP) between the VDRP and VFB pins. RVDRP can be calculated in two steps. First calculate the difference between the VDRP and VFB pin at full load. (The VFB voltage should be the same as the DAC voltage during closed loop operation.) Then choose the RVDRP to source enough current across RVFB for the desired change in output voltage. IOUT DVVDRP + R PwrstgZ ESR ConverterZ + PwrstgZ ) ESR RVDRP + DVVDRP CSA Gainń3 Multiply the converterZ by the output current step size to calculate where the output voltage should recover to within the first switching cycle after a transient. If the ConverterZ is higher than the value required to recover to where the adaptive positioning is set the remainder of the recovery will be controlled by the error amp compensation and will typically recover in 10−20 ms. DVR + DIOUT CS to VDRP Gain where: R = RL or RS for one phase; IOUT is the full load output current. where: PwrstgZ + RS IOUT RV(FB)ńDVOUT DESIGN EXAMPLE Choose the component values for lossless current sensing, adaptive positioning and current limit for a 250 kHz, 1.55 V, 60 A converter. The VID code is set to 1.6 V. Adaptive positioning is set for 100 mV above DACOUT (or 25 mV below VID) at no load and 75 mV below the no load position with a 60 A load. The peak output voltage transient should be less than 100 mV during a 60 A step current. The overcurrent limit is nominally 75 A. ConverterZ Current Sensing, Power Stage and Output Filter Components Make sure that DVR is less than the expected peak transient for a good transient response. 5. Adjust L and RL or RS as required to meet the best combination of transient response, steady state output voltage ripple and pulse width jitter. 1. Assume 1.5 mW of output filter ESR. 2. Choose C + 0.01 mF VOUTńVIN C 25 mV 1.55ń12 + (12 * 1.55) 250 k 0.01 mF 25 mV + 21.5 kW å Choose 20 kW R + (VIN * VOUT) Current Limit When the sum of the Current Sense amplifiers (VITOTAL) exceeds the voltage on the ILIM pin the part will enter hiccup mode. For inductive sensing the ILIM pin voltage should be set based on the inductor resistance (or current sense resistor) at max temperature and max current. To set the level of the ILIM pin: f LńRL + R C + 20 kW 0.01 mF + 200 ms Choose RL + 2.0 mW L + RL R C + 2.0 mW 200 ms + 400 nH 3. n/a 4. PwrstgZ + RL 6. VILIM + where: R is RL or RS; IOUT(LIM) is the current limit threshold. For the overcurrent to work properly the inductor time constant (L/R) should be ≤ the Current sense RC. If the RC is too fast, during step loads the current waveform will appear larger than it is (typically for a few hundred ms) and may trip the current limit at a level lower than the DC limit. CSA Gainń3 + 2.0 mW 4.2ń3.0 + 2.8 mW ConverterZ + PwrstgZ ESR PwrstgZ ) ESR + 2.8 mW 1.5 mW ^ 1.0 mW 2.8 mW ) 1.5 mW DVR + ConverterZ IOUT + 1.0 mW 60 A + 60 mV 5. n/a http://onsemi.com 17 CS5301 8. DVDRP + RL Current Limit IOUT Current Sense to VDRP Gain + 2.0 mW 60 A 3.1 + 372 mV 6. VILIM + RL IOUT(LIM) CS to ILIM Gain + 2.0 mW 75 A 6.5 + 975 mV RVDRP + DVDRP + 372 mV + 82 kW Adaptive Positioning RVFBńDVOUT 16.7 kWń75 mV 7. RVFB + NL PositionńVFB Bias Current + 100 mVń6.0 mA + 16.7 kW +12 V +5.0 V +12 V D1 BAT54S D3 BAT54S L4 300 nH D2 BAS16LT1 C12 1.0 nF C1 1.0 mF R10 10 K C3 1.0 mF C2 1.0 mF +5.0 V C4 C11 1.0 nF R3 0.1 mF CS1 L1 R4 1.0 W C14 1.0 mF U1 R8 191 k COMP VFB VDRP CS1 CS2 CS3 CSREF PWRGD VID0 VID1 VID2 VID3 VID4 PWRGDS ILIM REF CS5301 R11 10 k +5.0 V PWRGD Q1 1.0 mF 56.2 K C10 1.0 nF R9 36.5 k + C15,16 2 × 16SP180M R12 20 K VID0 VID1 VID2 ROSC VCCL VCCL1 Gate(L)1 GND1 Gate(H)1 VCCH12 Gate(H)2 GND2 Gate(L)2 VCCL23 Gate(L)3 GND3 Gate(H)3 VCCH3 LGND Q2 C17−24 8 × 4SP560M Q3 CS2 L2 1.0 mF Q4 C25−32 8 × 10 mF R1 VID3 3.09 k VID4 R2 Q5 C5 0.1 mF L3 R7 R6 30 k C6 .01 mF CS1 VCORE 1.0 mF 2.00 k R5 30 k CS3 Q6 30 k C7 .01 mF CS3 C8 .01 mF CS2 C9 .01 mF Q1−Q6, NTB85N03 or NTB85N03T4 by ON Semiconductor Figure 16. Additional Application Diagram, 12 V to 1.75 V, 45 A for AMD AthlonE Processor http://onsemi.com 18 CS5301 PACKAGE DIMENSIONS SO−32WB DW SUFFIX CASE 751P−01 ISSUE O NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT MAXIMUM MATERIAL CONDITION. −X− D 32 17 H E 0.25 −Y− M Y M 16 1 PIN 1 IDENT A 0.10 A1 B 0.25 G M T X S Y −T− L SEATING PLANE DIM A A1 B C D E G H L M MILLIMETERS MIN MAX 2.29 2.54 0.10 0.25 0.36 0.51 0.15 0.32 20.57 20.88 7.42 7.60 1.27 BSC 10.29 10.64 0.53 1.04 0° 8° C M S V2 is a trademark of Switch Power, Inc. Pentium is a registered trademark of Intel Corporation. AMD Athlon is a trademark of Advanced Micro Devices, Inc. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: N. American Technical Support: 800−282−9855 Toll Free Literature Distribution Center for ON Semiconductor USA/Canada P.O. Box 61312, Phoenix, Arizona 85082−1312 USA Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada Phone: 81−3−5773−3850 Email: orderlit@onsemi.com http://onsemi.com 19 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. CS5301/D
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