19-4713; Rev 0; 7/09 MAX17030 Evaluation Kit Features The MAX17030 evaluation kit (EV kit) demonstrates the high-power, dynamically adjustable, multiphase IMVP6.5 notebook CPU application circuit. This DC-DC converter steps down high-voltage batteries and/or AC adapters, generating a precision, low-voltage CPU core VCC rail. The MAX17030 EV kit meets the Intel mobile IMVP-6.5 CPU's transient voltage specification, powergood signaling, voltage regulator thermal monitoring (VRHOT), and power-good output (PWRGD). The MAX17030 EV kit consists of the MAX17030 3-phase interleaved Quick-PWMTM step-down controller and one external MAX8791 single synchronous MOSFET driver. The MAX17030 EV kit includes active voltage positioning with adjustable gain, reducing power dissipation and bulk output capacitance requirements. A slew-rate controller allows controlled transitions between VID codes, controlled soft-start and shutdown, and controlled exit suspend voltage. Precision slew-rate control provides "just-in-time" arrival at the new DAC setting, minimizing surge currents to and from the battery. MAX17030: Triple-Phase, Fast-Response Interleaved, Quick-PWM 2 Internal Drivers + 1 External Driver (MAX8791) Intel IMVP-6.5 Code-Set Compliant (Calpella Socket Configuration) Dynamic Phase Selection Optimizes Active/Sleep Efficiency Transient Phase Overlap Reduces Output Capacitance Active Voltage Positioning with Adjustable Gain High Speed, Accuracy, and Efficiency Low Bulk Output Capacitor Count 7V to 20V Input-Voltage Range 0 to 1.5000V Output-Voltage Range (7-Bit DAC) 66A Peak Load-Current Capability (22A Each Phase) Accurate Lossless Current Balance and Current Limit 300kHz Switching Frequency (per Phase) IMVP-6.5 Power Sequencing and Timing Compliant Remote Output and Ground Sense Power-Good (PWRGD) Output and Indicator (D3) Clock Enable (CLKEN) and Thermal Fault (VRHOT) Outputs and Indicators (D4 and D5) Current Monitor (IMON) Output Output Overvoltage and Undervoltage Fault Protections 40-Pin Thin QFN Package MAX17000: Complete DDR Supplies: VCCDDR, VTTDDR, and VTTR 7V to 20V Input-Voltage Range 400kHz Switching Frequency 10A Output Current Capability (VCCDDR) 2A Output Current Capability (VTTDDR) 3mA Output Current Capability (VTTR) Overvoltage Protection Power-Good Output Indicators (D15 and D16) 24-Pin Thin QFN Package MAX17007A: I/O Supplies: VTT1 and VTT2 7V to 20V Input-Voltage Range 300kHz Switching Frequency 12A Output Current Capability (VTT1) 12A Output Current Capability (VTT2) Overvoltage and Undervoltage Protections Thermal Protection Power-Good Output Indicators (D19 and D20) 28-Pin Thin QFN Package MAX17028: GMCH Graphics Supply: VCCAXG 7V to 20V Input-Voltage Range 400kHz Switching Frequency 14A Output Current Capability Overvoltage and Undervoltage Protections Thermal Fault (VRHOT) Output Indicator (D12) Current Monitor (DFGT_IMON) Output Power-Good (PWRGD) Output and Indicator (D13) 32-Pin Thin QFN Package Two dedicated system inputs (PSI and DPRSLPVR) dynamically select the operating mode and number of active phases, optimizing the overall efficiency during the CPU's active and sleep states. The MAX17030 includes latched output undervoltagefault protection, overvoltage-fault protection, and thermal-overload protection. It also includes a voltage regulator power-good (PWRGD) output, a clock enable (CLKEN) output, and a current monitor (IMON) output. The MAX17030 provides a digitally adjustable 0 to 1.5000V output voltage (7-bit on-board DAC) from a 7V to 20V battery-input range. Each phase is designed for a 20A thermal design current, and delivers up to 22A peak output current for a total of 66A. The EV kit operates at 300kHz switching frequency (per phase) and has superior line- and load-transient response. The MAX17030 EV kit also evaluates the MAX17000, MAX17007A, and MAX17028 DC-DC converters. Ordering Information PART TYPE MAX17030EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Quick-PWM is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 General Description Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Component List DESIGNATION CLKEN, CORE_VR_EN, DFGT_DPRSLPVR, DFGT_IMON, DFGT_VR_EN, DPRSLPVR, DRSKP, EN1, EN2, GND_SENSE, IMON, PGD_IN, PGOOD1, PGOOD2, PGOODVTT1, PGOODVTT2, PSI, PWM, PWRGD (x2), SHDN, SKIP, STDBY, VCCAXG_SENSE, VCCDDR, VOUT_SENSE, VRHOT, VRHOT1, VSSAXG_SENSE, VTT_1, VTT_2, VTT1 C1-C4, C68, C69, C105, C106, C130, C131, C160-C163 C5, C7, C8, C70, C107, C149, C166, C168 2 QTY DESCRIPTION DESIGNATION 2 6 1000pF 10%, 50V X7R ceramic capacitors (0603) TDK C1608X7R1H102K or Murata GRM188R71H102K or equivalent C13-C16, C73, C76, C111, C180 8 0.22F 20%, 10V X7R ceramic capacitors (0603) Murata GRM188R71A224K Taiyo Yuden LMK107BJ224MA TDK C1608X7R1C224M AVX 06033D224KAT C17, C18, C19, C21-C26, C28, C29, C31, C74, C75, C77, C109, C110, C112, C114, C137-C140, C170, C171, C175, C178, C179, C181, C183 0 Not installed, capacitors (0603) C20, C102, C104, C135, C136, C164, C165, C174 8 0.1F 10%, 25V X7R ceramic capacitors (0603) TDK C1608X7R1E104K or Murata GRM188R71E104K C27 0 Not installed, capacitor--short (PC trace) (0603) 0 Not installed, 1000F, 50V aluminum electrolytic capacitor (12.5mm x 25mm) SANYO 50MV1000AX 25 10F 20%, 6.3V X5R ceramic capacitors (0805) Murata GRM21BR60J106ME19L TDK C2012X5R0J106M or Taiyo Yuden AMK212BJ106MG AVX 08056D106MAT C12, C113, C121, C134, C172, C182 14 8 Test points 10F 20%, 25V X5R ceramic capacitors (1210) Murata GRM32DR61E106KA12L TDK C3225X7R1E106M AVX 12103D106M Taiyo Yuden TMK325BJ106MM KEMET C1210C106M3RAC 330F, 2V, 4.5m low-ESR polymer capacitors (D case) Panasonic EEFSX0D331E4 or NEC TOKIN PSGV0E337M4.5 KEMET T520V337M2R5ATE4R5 C6, C71, C108, C150, C167, C169 0 Not installed, capacitors (D case) C9 0 Not installed, capacitor (0805) DESCRIPTION 2.2F 20%, 10V X5R ceramic capacitors (0603) TDK C1608X5R1A225M or Murata GRM188R61A225M or AVX 0603ZD225MAT C10, C11 32 QTY C30 C32, C33, C115-C120, C141, C142, C143, C145-C148, C184-C193 _______________________________________________________________________________________ MAX17030 Evaluation Kit DESIGNATION C34-C60 C72, C100, C101, C132, C133, C176, C177 C103 C144 C173 D1, D2, D6, D10, D14, D17, D18 D3, D4, D5, D12, D13, D15, D16, D19, D20 QTY DESCRIPTION 27 22F, 6.3V X5R ceramic capacitors (0805) Murata GRM21BR60J226ME39L TDK C2012X5R0J226MT Taiyo Yuden JMK212BJ226MG 7 1F 10%, 16V X5R ceramic capacitors (0603) TDK C1608X5R1C105K Taiyo Yuden EMK107BJ683MA Murata GRM188R61C105K 1 100pF 10%, 50V X7R ceramic capacitor (0603) TDK C1608X7R1H101K Taiyo Yuden UMK107B101KZ 1 0.47F 20%, 10V X5R ceramic capacitor (0603) Murata GRM188R71C474M Taiyo Yuden LMK107BJ474MA TDK C1608X5R1A474M 1 7 9 2200pF 10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H222K TDK C1608X7R1H222K 3A, 30V Schottky diodes Nihon EC31QS03L Central Semi CMSH3-40M LEDs, green, clear, SMD (0805) Lite-On Electronics LTST-C170GKT Digi-Key 160-1179-1-ND JU1, JU4, JU5, JU6 4 3-pin headers (0.1in centers) JU8 1 2-pin header (0.1in centers) 3 0.36H, 36A, 0.82m power inductors Panasonic ETQP4LR36ZFC TOKO FDUE1040D-R36M 1 0.42H, 20A, 1.55m power inductor (6.7mm x 8mm x 4 mm) NEC TOKIN MPC0740LR42C TOKO FDUE640-R42M L1, L2, L3 L4 DESIGNATION QTY DESCRIPTION L5, L6, L7 3 0.6H, 17A, 2.3m power inductors (6.7mm x 8mm x 5 mm) NEC TOKIN MPC0750LR60C 7 n-channel MOSFETs (8 SO, PowerPAK) Fairchild FDS6298 Vishay (Siliconix) SI4386DY N3-N6, N9, N10, N12, N14, N16, N18 10 n-channel MOSFETs (8 SO, PowerPAK) Fairchild FDS8670 Vishay (Siliconix) SI4626ADY R1, R16, R44, R46, R51, R73, R74, R76, R77, R107, R142 11 10 5% resistors (0603) R2 1 137k 1% resistor (0603) R3 1 14k 1% resistor (0603) N1, N2, N8, N11, N13, N15, N17 R4, R156 2 200k 1% resistors (0603) R5, R6, R15, R19, R24, R32, R47, R50, R62, R65, R79, R96, R97, R106, R120, R128, R139, R170 18 0 resistors (0603) R7, R11, R21, R67, R69 5 2.21k 1% resistors (0603) R8, R12, R35 3 3.24k 1% resistors (0603) R9, R13, R34 3 40.2k 1% resistors (0603) R10, R14, R36, R68, R115, R134, R148 7 10k 1% NTC thermistors, = 3380 (0603) Murata NCP18XH103F03RB TDK NTCG163JH103F R17, R54, R133 3 6.04k 1% resistors (0603) _______________________________________________________________________________________ 3 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Component List (continued) Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION R18, R48, R49, R53, R71, R72, R87, R89-R95, R98, R99, R103, R111, R112, R117, R118, R119, R122-R127, R129, R131, R132, R137, R138, R147, R150, R151, R157 0 R20, R52, R100, R130 0 Not installed, resistors--short (PC trace) (1210) R22, R23, R30 3 1.91k 5% resistors (0603) R25, R60 2 13k 1% resistors (0603) 2 100k 5% NTC thermistors, = 4250 (0603) Murata NCP18WF104J03RBTDK NTCG163JF104J R26, R61 R27, R28, R29, R31, R58, R66, R102, R108, R109, R110, R144, R155 12 R33 1 Not installed, resistors (0603) R18, R48, R49, R87, R89-R95, R98, R99, R111, R112, R119, R122-R127, R129, R147, R157 are open; R53, R71, R72, R103, R117, R118, R131, R132, R137, R138, R150, R151 are short (PC trace) 100k 5% resistors (0603) QTY R121 0 Not installed, resistor--short (PC trace) (0805) R135 1 4.22k 1% resistor (0603) R136 1 3.01k 1% resistor (0603) 14 100k 1% resistors (0603) R45, R88 2 100 5% resistors (0603) R55 1 63.4k 1% resistor (0603) R56, R101, R145 3 150k 1% resistors (0603) R57, R59, R78, R104, R105, R143, R154 7 1k 5% resistors (0603) R63, R64, R153 3 10k 1% resistors (0603) R70 1 15k 1% resistor (0603) R75 1 13.3k 1% resistor (0603) R113, R114 2 3.48 k 1% resistors (0603) R116 1 20k 1% resistor (0603) DESCRIPTION R140 1 90.9k 1% resistor (0603) R141 1 110k 1% resistor (0603) R146 1 4.99k 1% resistor (0603) R149 1 1.3k 1% resistor (0603) R152 1 5.76k 1% resistor (0603) R158, R159, R160 3 2 5% resistors (0603) REFIN1, SKIPVTT 0 Not installed, test points SW1, SW3 2 7-position low-profile DIP switches SW2, SW4, SW5 3 4-position low-profile DIP switches U1 1 3/2-phase Quick-PWM VID controller (40 TQFN-EP*) Maxim MAX17030GTL+ U2 1 CPU socket rPGA-989 U3 1 Single driver (8 TQFN) Maxim MAX8791GTA+ U4 1 1-phase Quick-PWM VID controller (32 TQFN-EP*) Maxim MAX17028GTJ+ U5 1 DDR memory power controller (24 TQFN) Maxim MAX17000ETG+ U6 1 Dual step-down Quick-PWM controller (28 TQFN) Maxim MAX17007AGTI+ -- 1 PCB: MAX17030 EVALUATION KIT+ 11.5k 1% resistor (0603) R37-R43, R80-R86 4 DESIGNATION *EP = Exposed pad. _______________________________________________________________________________________ MAX17030 Evaluation Kit SUPPLIER PHONE WEBSITE AVX Corporation 843-946-0238 www.avxcorp.com Central Semiconductor Corp. 631-435-1110 www.centralsemi.com Digi-Key Corp. 800-344-4539 www.digikey.com Fairchild Semiconductor 888-522-5372 864-963-6300 www.fairchildsemi.com www.kemet.com KEMET Corp. Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com NEC TOKIN America, Inc. 408-324-1790 www.nec-tokinamerica.com Nihon Inter Electronics Corp. 847-843-7500 www.niec.co.jp Panasonic Corp. 800-344-2112 www.panasonic.com SANYO Electric Co., Ltd. 619-661-6835 www.sanyodevice.com Taiyo Yuden 800-348-2496 www.t-yuden.com TDK Corp. 847-803-6100 www.component.tdk.com TOKO America, Inc. 847-297-0070 www.tokoam.com Vishay 402-563-6866 www.vishay.com Note: Indicate that you are using the MAX17030 when contacting these component suppliers. Quick Start Recommended Equipment * MAX17030 EV kit * 7V to 20V power supply, battery, or notebook AC adapter * DC bias power supply, 5V at 1A * DC bias power supply, 3.3V at 100mA * Three dummy loads capable of sinking 22A each * Digital multimeters (DMMs) * Set SW1 (2, 13), SW1 (4, 11), and SW1 (6, 9) to the on positions. Set SW4 (1, 8) and SW5 (4, 5) to the on positions.The output voltage is set for 0.9750V. 3) Turn on the battery power before turning on the 5V bias power. Turn on the 5V and 3.3V power supplies. 4) Observe the 0.9750V output voltage with the DMM and/or oscilloscope. Look at the LX switching nodes and MOSFET gate-drive signals while varying the load current. Detailed Description of Hardware 100MHz dual-trace oscilloscope Procedure The MAX17030 EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Ensure that the circuit is connected correctly to the supplies and dummy load prior to applying any power. 2) Verify that all positions of switch SW2 are off. The DAC code settings (D6-D0) are set by switch SW1. This 66A multiphase buck-regulator design is optimized for a 300kHz switching frequency (per phase) and output-voltage settings around 1V. At VOUT = 1V and VIN = 12V, the inductor ripple is approximately 30% (LIR = 0.30). The MAX17030 controller interleaves all the active phases, resulting in out-of-phase operation that minimizes the input and output filtering requirements. The multiphase controller shares the current between three phases that operate 120 out-of-phase, supplying up to 22A per phase. _______________________________________________________________________________________ 5 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Component Suppliers Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Setting the Output Voltage The MAX17030 has an internal digital-to-analog converter (DAC) that programs the output voltage. The output voltage can be digitally set from 0 to 1.5000V (Table 2) from the D0-D6 pins. There are two different ways of setting the output voltage: 1) Drive the external VID0-VID6 inputs (all SW1 positions are off). The output voltage is set by driving VID0-VID6 with open-drain drivers (pullup resistors are included on the board) or 3V/5V CMOS output logic levels. 2) Switch SW1. When SW1 positions are off, the MAX17030's D0-D6 inputs are at logic 0 (connected to GND). When SW1 positions are on, D0-D6 inputs are at logic 1 (connected to VTT1). The output voltage can be changed during operation by activating SW1 on and off. As shipped, the EV kit is configured with SW1 positions set for 0.9750V output (Table 2). Refer to the MAX17030 IC data sheet for more information. Table 1. MAX17030 Operating Mode Truth Table INPUTS SHDN SW5 (1, 8) DPRSLPVR SW5 (2, 7) PSI SW5 (3, 6) PHASE OPERATION* GND X X Disabled Multiphase pulse-skipping 1/4 RTIME slew rate OPERATING MODE Low-Power Shutdown Mode. DL1 and DL2 are forced low and the controller is disabled. The supply current drops to 1A (max). Startup/Boot. When SHDN is pulled high, the MAX17030 begins the startup sequence. Once the REF is above 1.84V, the controller enables the PWM controller and ramps the output voltage up to the boot voltage. Rising X X High Low High Multiphase Full Power. The no-load output voltage is determined by the selected forced-PWM VID DAC code (D0-D6, Table 2). nominal RTIME slew rate Low Intermediate Power. The no-load output voltage is determined by the (N-1)-phase selected VID DAC code (D0-D6, Table 2). When PSI is pulled low, the forced-PWM MAX17030 immediately disables phase 3. PWM3 is three-state and nominal RTIME slew rate DRSKP is low. High High Low High X Deeper Sleep Mode. The no-load output voltage is determined by the selected VID DAC code (D0-D6, Table 2). When DPRSLPVR is pulled 1-phase high, the MAX17030 immediately enters 1-phase pulse-skipping pulse-skipping operation, allowing automatic PWM/PFM switchover under light loads. nominal RTIME slew rate The PWRGD and CLKEN upper thresholds are blanked. DH2 and DL2 are pulled low. PWM3 is three-state and DRSKP is low. Falling X X Multiphase forced-PWM 1/4 RTIME slew rate High X X Disabled Shutdown. When SHDN is pulled low, the MAX17030 immediately pulls PWRGD low, CLKEN becomes high impedance, all enabled phases are activated, and the output voltage is ramped down to 12.5mV, then DH_ and DL_ are pulled low, and CSN1 discharge FET is turned on. Fault Mode. The fault latch has been set by the MAX17030 UVP or thermal-shutdown protection, or by the OVP protection. The controller remains in fault mode until VCC power is cycled or SHDN toggled. *Multiphase operation = All enabled phases active. X = Don't care. 6 _______________________________________________________________________________________ MAX17030 Evaluation Kit Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Table 2. MAX17030 IMVP-6.5 Output-Voltage VID DAC Codes D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE (V) D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE (V) 0 0 0 0 0 0 0 1.5000 1 0 0 0 0 0 0 0.7000 0 0 0 0 0 0 1 1.4875 1 0 0 0 0 0 1 0.6875 0 0 0 0 0 1 0 1.4750 1 0 0 0 0 1 0 0.6750 0 0 0 0 0 1 1 1.4625 1 0 0 0 0 1 1 0.6625 0 0 0 0 1 0 0 1.4500 1 0 0 0 1 0 0 0.6500 0 0 0 0 1 0 1 1.4375 1 0 0 0 1 0 1 0.6375 0 0 0 0 1 1 0 1.4250 1 0 0 0 1 1 0 0.6250 0 0 0 0 1 1 1 1.4125 1 0 0 0 1 1 1 0.6125 0 0 0 1 0 0 0 1.4000 1 0 0 1 0 0 0 0.6000 0 0 0 1 0 0 1 1.3875 1 0 0 1 0 0 1 0.5875 0 0 0 1 0 1 0 1.3750 1 0 0 1 0 1 0 0.5750 0 0 0 1 0 1 1 1.3625 1 0 0 1 0 1 1 0.5625 0 0 0 1 1 0 0 1.3500 1 0 0 1 1 0 0 0.5500 0 0 0 1 1 0 1 1.3375 1 0 0 1 1 0 1 0.5375 0 0 0 1 1 1 0 1.3250 1 0 0 1 1 1 0 0.5250 0 0 0 1 1 1 1 1.3125 1 0 0 1 1 1 1 0.5125 0 0 1 0 0 0 0 1.3000 1 0 1 0 0 0 0 0.5000 0 0 1 0 0 0 1 1.2875 1 0 1 0 0 0 1 0.4875 0 0 1 0 0 1 0 1.2750 1 0 1 0 0 1 0 0.4750 0 0 1 0 0 1 1 1.2625 1 0 1 0 0 1 1 0.4625 0 0 1 0 1 0 0 1.2500 1 0 1 0 1 0 0 0.4500 0 0 1 0 1 0 1 1.2375 1 0 1 0 1 0 1 0.4375 0 0 1 0 1 1 0 1.2250 1 0 1 0 1 1 0 0.4250 0 0 1 0 1 1 1 1.2125 1 0 1 0 1 1 1 0.4125 0 0 1 1 0 0 0 1.2000 1 0 1 1 0 0 0 0.4000 0 0 1 1 0 0 1 1.1875 1 0 1 1 0 0 1 0.3875 0 0 1 1 0 1 0 1.1750 1 0 1 1 0 1 0 0.3750 0 0 1 1 0 1 1 1.1625 1 0 1 1 0 1 1 0.3625 0 0 1 1 1 0 0 1.1500 1 0 1 1 1 0 0 0.3500 0 0 1 1 1 0 1 1.1375 1 0 1 1 1 0 1 0.3375 0 0 1 1 1 1 0 1.1250 1 0 1 1 1 1 0 0.3250 0 0 1 1 1 1 1 1.1125 1 0 1 1 1 1 1 0.3125 0 1 0 0 0 0 0 1.1000 1 1 0 0 0 0 0 0.3000 0 1 0 0 0 0 1 1.0875 1 1 0 0 0 0 1 0.2875 0 1 0 0 0 1 0 1.0750 1 1 0 0 0 1 0 0.2750 0 1 0 0 0 1 1 1.0625 1 1 0 0 0 1 1 0.2625 0 1 0 0 1 0 0 1.0500 1 1 0 0 1 0 0 0.2500 0 1 0 0 1 0 1 1.0375 1 1 0 0 1 0 1 0.2375 0 1 0 0 1 1 0 1.0250 1 1 0 0 1 1 0 0.2250 0 1 0 0 1 1 1 1.0125 1 1 0 0 1 1 1 0.2125 _______________________________________________________________________________________ 7 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Table 2. MAX17030 IMVP-6.5 Output-Voltage VID DAC Codes (continued) D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE (V) D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE (V) 0 1 0 1 0 0 0 1.0000 1 1 0 1 0 0 0 0.2000 0 1 0 1 0 0 1 0.9875 1 1 0 1 0 0 1 0.1875 0 1 0 1 0 1 0 0.9750 1 1 0 1 0 1 0 0.1750 0 1 0 1 0 1 1 0.9625 1 1 0 1 0 1 1 0.1625 0 1 0 1 1 0 0 0.9500 1 1 0 1 1 0 0 0.1500 0 1 0 1 1 0 1 0.9375 1 1 0 1 1 0 1 0.1375 0 1 0 1 1 1 0 0.9250 1 1 0 1 1 1 0 0.1250 0 1 0 1 1 1 1 0.9125 1 1 0 1 1 1 1 0.1125 0 1 1 0 0 0 0 0.9000 1 1 1 0 0 0 0 0.1000 0 1 1 0 0 0 1 0.8875 1 1 1 0 0 0 1 0.0875 0 1 1 0 0 1 0 0.8750 1 1 1 0 0 1 0 0.0750 0 1 1 0 0 1 1 0.8625 1 1 1 0 0 1 1 0.0625 0 1 1 0 1 0 0 0.8500 1 1 1 0 1 0 0 0.0500 0 1 1 0 1 0 1 0.8375 1 1 1 0 1 0 1 0.0375 0 1 1 0 1 1 0 0.8250 1 1 1 0 1 1 0 0.0250 0 1 1 0 1 1 1 0.8125 1 1 1 0 1 1 1 0.0125 0 1 1 1 0 0 0 0.8000 1 1 1 1 0 0 0 0 0 1 1 1 0 0 1 0.7875 1 1 1 1 0 0 1 0 0 1 1 1 0 1 0 0.7750 1 1 1 1 0 1 0 0 0 1 1 1 0 1 1 0.7625 1 1 1 1 0 1 1 0 0 1 1 1 1 0 0 0.7500 1 1 1 1 1 0 0 0 0 1 1 1 1 0 1 0.7375 1 1 1 1 1 0 1 0 0 1 1 1 1 1 0 0.7250 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 0.7125 1 1 1 1 1 1 1 Off Reduced Power-Dissipation Voltage Positioning Dynamic Output-Voltage Transition Experiment The MAX17030 includes a transconductance amplifier for adding gain to the voltage-positioning sense path. The amplifier's input is generated by summing the currentsense inputs, which differentially sense the voltage across the inductor's DCR. The transconductance amplifier's output connects to the voltage-positioned feedback input (FBAC), so the resistance between FBAC and VOUT (R17) determines the voltage-positioning gain. Resistor R17 (6.04k) provides a -1.9mV/A voltage-positioning slope at the output when all phases are active. Remote output and ground sensing eliminate any additional PCB voltage drops. This MAX17030 EV kit is set to transition the output voltage at 6mV/s. The speed of the transition is altered by scaling resistors R2 and R3. 8 During the voltage transition, watch the inductor current by looking at the current-sense inputs with a differential scope probe. Observe the low, well-controlled inductor current that accompanies the voltage transition. Slew-rate control during shutdown and startup results in well-controlled currents in to and out of the battery (input source). There are two methods to create an output-voltage transition. Select D0-D6 (SW1). Then either manually change the SW1 settings to a new VID code setting (Table 2), or disable all SW1 settings and drive the VID0-VID6 PCB test points externally to the desired code settings. _______________________________________________________________________________________ MAX17030 Evaluation Kit Shutdown SW5 (1, 8) When SHDN goes low (SW5 (1, 8) = on), the MAX17030 enters low-power shutdown mode. PWRGD is pulled low immediately and the output voltage ramps down at 1/4 the slew rate set by R2 and R3. When the controller reaches the 12.5mV target, the drivers are disabled (DH_ and DL_ driven low), the reference is turned off, and the IC supply currents drop to 1A (max). When a fault condition activates the shutdown sequence (output undervoltage lockout or thermal shutdown), the protection circuitry sets the fault latch to prevent the controller from restarting. To clear the fault latch and reactivate the MAX17030, toggle SHDN or cycle VDD power. DPRSLPVR SW5 (2, 7), PSI SW5 (3, 6) DPRSLPVR and PSI together determine the operating mode, as shown in Table 4. The MAX17030 is in pulseskipping mode during startup and in boot mode, and is forced into PWM mode during soft-shutdown. PGD_IN, SW5 (4, 5) PGD_IN indicates the power status of other system rails and is used for power-supply sequencing. After powerup to the boot voltage, the output voltage remains at VBOOT, CLKEN remains high, and PWRGD remains low as long as the PG_DIN stays low. When PGD_IN is pulled high, the output transitions to selected VID voltage, and CLKEN is pulled low. If the system pulls PGD_IN low during normal operation, the MAX17030 immediately drives CLKEN high, pulls PWRGD low, and slews the output to the boot voltage (using 3-phase pulse-skipping mode). The controller remains at the boot voltage until PGD_IN goes high again, SHDN is toggled, or the VDD is cycled. Evaluating the MAX17028 Circuit The MAX17030 EV kit also demonstrates the highpower, dynamically adjustable, 1-phase MAX17028 Quick-PWM step-down VID power-supply controller. This DC-DC converter steps down high-voltage batteries and/or AC adapters, generating a precision, lowvoltage VCCAXG rail for Intel's GMCH graphics core. The MAX17028 circuit includes power-good signaling, voltage regulator thermal monitoring (VRHOT), and current monitor (DFGT_IMON) output. The MAX17028 includes active voltage positioning with adjustable gain, reducing power dissipation and bulk output capacitance requirements. An internal amplifier buffers the DAC and accurately controls the slew rate for all output-voltage transitions, including transitions between Table 3. Shutdown Mode (SHDN) SW5 (1, 8) SHDN PIN Off Connected to V3P3 Output enabled--VOUT is selected by VID DAC code (D0-D6) settings On Connected to GND Shutdown mode, VOUT = 0 MAX17030 OUTPUT Table 4. DPRSLPVR, PSI DPRSLPVR SW5 (2, 7) PSI SW5 (3, 6) POWER LEVEL OPERATING MODE On (VCCP) X Low current 1-phase pulse-skipping mode Off (GND) On (GND) Intermediate 2-phase forced-PWM mode Off (GND)* Off (VCCP)* Full Normal operation--all phases are active, forced-PWM mode *Default position. X = Don't care. Table 5. PGD_IN SW5 (4, 5) PGD_IN PIN MAX17030 OUTPUT Off Connected to GND VOUT remains at the boot voltage. CLKEN remains high, and PWRGD remains low. On Connected to V3P3 VOUT transitions to selected VID voltage, and CLKEN is pulled low. _______________________________________________________________________________________ 9 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Switch SW5 Settings Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit VID codes, startup, and shutdown. Precision slew-rate control provides just-in-time arrival at the new DAC setting, minimizing surge currents to and from the battery. The MAX17028 includes output undervoltage fault, overvoltage-fault protection, and thermal overload protection. It also includes a voltage regulator power-good (PWRGD) output. The output voltage (VCCAXG) can be digitally adjustable from 0 to 1.5000V (7-bit on-board DAC) from a 7V to 20V battery input range. It delivers up to 14A output current. The MAX17028 circuit operates at 400kHz switching frequency and has superior line- and load-transient response. Setting the VCCAXG Output Voltage The MAX17028 has an internal DAC that programs the VCCAXG output voltage. The output voltage is digitally set from 0 to 1.5000V (Table 6) using the D0-D6 pins. When SW3 positions are off, the MAX17028's D0-D6 inputs are at logic 0 (connected to GND). When SW3 positions are on, D0-D6 inputs are at logic 1 (connected to VTT1). The output voltage can be changed during operation by activating SW3 on and off. As shipped, the EV kit is configured with SW3 positions set for 0.9000V output (SW3 (5, 10), SW3 (6, 9) and SW2 (1, 8) in the on positions) (Table 6). Refer to the MAX17028 IC data sheet for more information. Table 6. MAX17028 GMCH Output-Voltage Adjustment Settings D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE (V) D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE (V) 0 0 0 0 0 0 0 1.5000 1 0 0 0 0 0 0 0.7000 0 0 0 0 0 0 1 1.4875 1 0 0 0 0 0 1 0.6875 0 0 0 0 0 1 0 1.4750 1 0 0 0 0 1 0 0.6750 0 0 0 0 0 1 1 1.4625 1 0 0 0 0 1 1 0.6625 0 0 0 0 1 0 0 1.4500 1 0 0 0 1 0 0 0.6500 0 0 0 0 1 0 1 1.4375 1 0 0 0 1 0 1 0.6375 0 0 0 0 1 1 0 1.4250 1 0 0 0 1 1 0 0.6250 0 0 0 0 1 1 1 1.4125 1 0 0 0 1 1 1 0.6125 0 0 0 1 0 0 0 1.4000 1 0 0 1 0 0 0 0.6000 0 0 0 1 0 0 1 1.3875 1 0 0 1 0 0 1 0.5875 0 0 0 1 0 1 0 1.3750 1 0 0 1 0 1 0 0.5750 0 0 0 1 0 1 1 1.3625 1 0 0 1 0 1 1 0.5625 0 0 0 1 1 0 0 1.3500 1 0 0 1 1 0 0 0.5500 0 0 0 1 1 0 1 1.3375 1 0 0 1 1 0 1 0.5375 0 0 0 1 1 1 0 1.3250 1 0 0 1 1 1 0 0.5250 0 0 0 1 1 1 1 1.3125 1 0 0 1 1 1 1 0.5125 0 0 1 0 0 0 0 1.3000 1 0 1 0 0 0 0 0.5000 0 0 1 0 0 0 1 1.2875 1 0 1 0 0 0 1 0.4875 0 0 1 0 0 1 0 1.2750 1 0 1 0 0 1 0 0.4750 0 0 1 0 0 1 1 1.2625 1 0 1 0 0 1 1 0.4625 0 0 1 0 1 0 0 1.2500 1 0 1 0 1 0 0 0.4500 0 0 1 0 1 0 1 1.2375 1 0 1 0 1 0 1 0.4375 0 0 1 0 1 1 0 1.2250 1 0 1 0 1 1 0 0.4250 0 0 1 0 1 1 1 1.2125 1 0 1 0 1 1 1 0.4125 0 0 1 1 0 0 0 1.2000 1 0 1 1 0 0 0 0.4000 0 0 1 1 0 0 1 1.1875 1 0 1 1 0 0 1 0.3875 0 0 1 1 0 1 0 1.1750 1 0 1 1 0 1 0 0.3750 0 0 1 1 0 1 1 1.1625 1 0 1 1 0 1 1 0.3625 10 ______________________________________________________________________________________ MAX17030 Evaluation Kit D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE (V) D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE (V) 0 0 1 1 1 0 0 1.1500 1 0 1 1 1 0 0 0.3500 0 0 1 1 1 0 1 1.1375 1 0 1 1 1 0 1 0.3375 0 0 1 1 1 1 0 1.1250 1 0 1 1 1 1 0 0.3250 0 0 1 1 1 1 1 1.1125 1 0 1 1 1 1 1 0.3125 0 1 0 0 0 0 0 1.1000 1 1 0 0 0 0 0 0.3000 0 1 0 0 0 0 1 1.0875 1 1 0 0 0 0 1 0.2875 0 1 0 0 0 1 0 1.0750 1 1 0 0 0 1 0 0.2750 0 1 0 0 0 1 1 1.0625 1 1 0 0 0 1 1 0.2625 0 1 0 0 1 0 0 1.0500 1 1 0 0 1 0 0 0.2500 0 1 0 0 1 0 1 1.0375 1 1 0 0 1 0 1 0.2375 0 1 0 0 1 1 0 1.0250 1 1 0 0 1 1 0 0.2250 0 1 0 0 1 1 1 1.0125 1 1 0 0 1 1 1 0.2125 0 1 0 1 0 0 0 1.0000 1 1 0 1 0 0 0 0.2000 0 1 0 1 0 0 1 0.9875 1 1 0 1 0 0 1 0.1875 0 1 0 1 0 1 0 0.9750 1 1 0 1 0 1 0 0.1750 0 1 0 1 0 1 1 0.9625 1 1 0 1 0 1 1 0.1625 0 1 0 1 1 0 0 0.9500 1 1 0 1 1 0 0 0.1500 0 1 0 1 1 0 1 0.9375 1 1 0 1 1 0 1 0.1375 0 1 0 1 1 1 0 0.9250 1 1 0 1 1 1 0 0.1250 0 1 0 1 1 1 1 0.9125 1 1 0 1 1 1 1 0.1125 0 1 1 0 0 0 0 0.9000 1 1 1 0 0 0 0 0.1000 0 1 1 0 0 0 1 0.8875 1 1 1 0 0 0 1 0.0875 0 1 1 0 0 1 0 0.8750 1 1 1 0 0 1 0 0.0750 0 1 1 0 0 1 1 0.8625 1 1 1 0 0 1 1 0.0625 0 1 1 0 1 0 0 0.8500 1 1 1 0 1 0 0 0.0500 0 1 1 0 1 0 1 0.8375 1 1 1 0 1 0 1 0.0375 0 1 1 0 1 1 0 0.8250 1 1 1 0 1 1 0 0.0250 0 1 1 0 1 1 1 0.8125 1 1 1 0 1 1 1 0.0125 0 1 1 1 0 0 0 0.8000 1 1 1 1 0 0 0 0 0 1 1 1 0 0 1 0.7875 1 1 1 1 0 0 1 0 0 1 1 1 0 1 0 0.7750 1 1 1 1 0 1 0 0 0 1 1 1 0 1 1 0.7625 1 1 1 1 0 1 1 0 0 1 1 1 1 0 0 0.7500 1 1 1 1 1 0 0 0 0 1 1 1 1 0 1 0.7375 1 1 1 1 1 0 1 0 0 1 1 1 1 1 0 0.7250 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 0.7125 1 1 1 1 1 1 1 0 ______________________________________________________________________________________ 11 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Table 6. MAX17028 GMCH Output-Voltage Adjustment Settings (continued) Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Table 7. MAX17028 Operating Mode Truth Table INPUTS SHDN SW2 (1, 8) DPRSLPVR SW2 (2, 7) PGD_IN Low X X Disabled High Low High 1-phase forced-PWM 1/2 RTIME slew rate Full Power. The no-load output voltage is determined by the selected VID DAC code (D0-D6). High 1-phase pulseskipping nominal RTIME slew rate Skip Mode. The no-load output voltage is determined by the selected VID DAC code (D0-D6). When DPRSLPVR is pulled high, the MAX17028 immediately enters 1-phase pulseskipping operation, allowing automatic PWM/PFM switchover under light loads. X 1-phase forced-PWM 1/8 RTIME slew rate High High Falling X STATE OPERATING MODE Low-Power Shutdown Mode. DL forced low, and the controller is disabled. The controller's bias supply current drops to 15A (typ). Shutdown. When SHDN is pulled low, the MAX17028 immediately pulls PWRGD low and the output voltage is ramped down to ground. Once the output reaches 0V, the controller enters the low-power shutdown state. X = Don't care. Switch SW2 Settings Switch SW2 controls the MAX17028 operating modes (Table 7). VCCDDR. Install feedback resistors with values according to the following equation: R119 VCCDDR = VFB 1 + R120 Evaluating the MAX17000 Circuit The MAX17030 kit also demonstrates the MAX17000 DDR memory power-solution circuit. The MAX17000 provides the regulated voltages required in a complete DDR memory system. The MAX17000 generates the main memory voltage (VCCDDR), the tracking sinking/sourcing termination voltage (VTTDDR), and the reference voltage (VTTR). The MAX17000 circuit operates at 400kHz switching frequency, generates a preset 1.5V VCCDDR main memory voltage that is capable of sourcing 10A from 7V to 20V battery input range. The termination regulator provides a 0.75V VTTDDR supply that is capable of sinking/sourcing 2A. The termination reference buffer provides a 0.75V VTTR supply that is capable of sinking/sourcing 3mA. Setting the VCCDDR Output Voltage The MAX17000 feedback input (FB) is connected to a network of resistors, which set the VCCDDR output voltage. By default, the output voltage is preset to a fixed 1.5V output (R120 = 0). For a fixed 1.8V output, remove R120 and install a short across resistor R99. For an adjustable VCCDDR output (1V to 2.7V), connect FB to resistive divider R119 and R120 from the output voltage 12 where VFB = 1V. Use 10k for R120, and calculate R119 for the desired VCCDDR output voltage. MAX17000 Standby Control Input (STDBY) and Shutdown Control Input (SHDN) The MAX17000 features independent standby and shutdown controls by implementing switches SW4 (4, 5) and SW4 (3, 6) to control the STDBY and SHDN inputs, respectively. Switches SW4 (4, 5) and SW4 (3, 6) allow flexible sequencing to support all DDR operating states. The shutdown and standby control logic is illustrated in Table 8. Table 8. SW4 (4, 5) (STDBY) and SW4 (3, 6) (SHDN) Functions SW4 (4, 5) (STDBY) SW4 (3, 6) (SHDN) VCCDDR OUTPUT VTTDDR VTTR Disabled X Off Disabled Disabled On On Enabled Enabled Enabled Off On Enabled Disabled Enabled X = Don't care. ______________________________________________________________________________________ MAX17030 Evaluation Kit This DC-DC converter steps down high-voltage batteries to generate low-voltage core or chipset/RAM bias supplies in notebook computers. The MAX17007A circuit generates two independent I/O voltages (VTT1 and VTT2) from a 7V to 20V battery-input range. VTT1 and VTT2 are configured for 1.1V output voltages. Each output delivers up to 12A. The VTT1 and VTT2 outputs operate at 270kHz and 330kHz switching frequencies, respectively. Both outputs can be configured for other voltages by changing R140, R141, R152, and R153 values. Refer to the MAX17007A IC data sheet for more details. Table 9. Switch SW4 (1, 8) Functions The outputs can also be combined to operate as a 2phase, high-current, single-output regulator. In this mode, the output is configured for either a preset, adjustable, or dynamically adjustable output voltage using REFIN1. Refer to the Combined-Mode Operation (FB2 = VCC) section in the IC MAX17007A data sheet for more details. The MAX17007A provides access to the device's enable control pins (EN1 and EN2), through SW4 switches SW4 (1, 8) and SW4 (2, 7), respectively. EN1 is used to control the VTT1 output and EN2 is used to control the VTT2 output. When in combined mode, EN1 is used for output control and EN2 must be connected to GND. Tables 9 and 10 list the options for each output-enable pin. Table 10. Switch SW4 (2, 7) Functions SW4 (1, 8) EN1 PIN VTT1 OUTPUT SW4 (2, 7) EN2 PIN VTT2 OUTPUT On Connected to V3P3 Enabled, VTT1 = 1.1V On Connected to V3P3 Enabled, VTT2 = 1.1V Off Connected to GND through R144 Shutdown mode, VTT1 = 0V Off Connected to GND through R155 Shutdown mode, VTT2 = 0V ______________________________________________________________________________________ 13 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Evaluating the MAX17007A Circuit The MAX17030 kit also demonstrates the MAX17007A I/O power solution circuit. Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Figure 1a. MAX17030 EV Kit Schematic (Sheet 1 of 5) 14 ______________________________________________________________________________________ MAX17030 Evaluation Kit Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Figure 1b. MAX17030 EV Kit Schematic (Sheet 2 of 5) ______________________________________________________________________________________ 15 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Figure 1c. MAX17030 EV Kit Schematic (Sheet 3 of 5) 16 ______________________________________________________________________________________ MAX17030 Evaluation Kit Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Figure 1d. MAX17030 EV Kit Schematic (Sheet 4 of 5) ______________________________________________________________________________________ 17 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Figure 1e. MAX17030 EV Kit Schematic (Sheet 5 of 5) 18 ______________________________________________________________________________________ MAX17030 Evaluation Kit Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Figure 2. MAX17030 EV Kit Component Placement Guide--Component Side ______________________________________________________________________________________ 19 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Figure 3. MAX17030 EV Kit PCB Layout--Component Side 20 ______________________________________________________________________________________ MAX17030 Evaluation Kit Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Figure 4. MAX17030 EV Kit PCB Layout--Internal Layer 2 (PGND Plane) ______________________________________________________________________________________ 21 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Figure 5. MAX17030 EV Kit PCB Layout--Internal Layer 3 (Signal Layer) 22 ______________________________________________________________________________________ MAX17030 Evaluation Kit Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Figure 6. MAX17030 EV Kit PCB Layout--Internal Layer 4 (AGND/PGND Layer) ______________________________________________________________________________________ 23 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Figure 7. MAX17030 EV Kit PCB Layout --Internal Layer 5 (PGND Layer) 24 ______________________________________________________________________________________ MAX17030 Evaluation Kit Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Figure 8. MAX17030 EV Kit PCB Layout --Internal Layer 6 (Signal Layer) ______________________________________________________________________________________ 25 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Figure 9. MAX17030 EV Kit PCB Layout --Internal Layer 7 (PGND Layer) 26 ______________________________________________________________________________________ MAX17030 Evaluation Kit Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 Figure 10. MAX17030 EV Kit PCB Layout--Solder Side ______________________________________________________________________________________ 27 Evaluates: MAX17000/MAX17007A/MAX17028/MAX17030 MAX17030 Evaluation Kit Figure 11. MAX17030 EV Kit Component Placement Guide--Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 28 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2009 Maxim Integrated Products SPRINGER Maxim is a registered trademark of Maxim Integrated Products, Inc. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX17030EVKIT+