User Guide 036 lSL8273MEVAL1Z Evaluation Board User Guide Description Key Features The ISL8273M is a 80A step-down DC/DC power supply module with an integrated digital PWM controller, dual-phase synchronous power switches, inductors and passives. Only input/output capacitors and minimal passives are needed to finish the design. 80A of continuous output current can be delivered without a need of airflow or heatsink. The ISL8273M uses ChargeMode™ control (ASCR) architecture, which responds to a transient load within a single switching cycle. • VIN range of 4.5V to 14V, VOUT adjustable from 0.6V to 2.5V • Programmable VOUT, margining, input and output UVP/OVP, IOUT limit, OTP/UTP, soft-start/stop, sequencing and external synchronization • Monitor: VIN, VOUT, IOUT, temperature, duty cycle, switching frequency and faults • ChargeMode™ control tunable with PMBus • Mechanical switch for enable and power-good LED indicator The ISL8273MEVAL1Z evaluation board is a 4.7inx4.8in 8-layer FR4 board with 2oz. copper on all layers. This evaluation board comes with placeholders for pin-strap resistor population to adjust output voltage, switching frequency, soft-start/stop timing and input UVLO threshold, ASCR gain and residual parameters and device PMBus™ address. More configurations, such as sequencing, Digital-DC™ (DDC) bus configuration and fault limits can be easily programmed or changed via PMBus compliant serial bus interface. Specifications This board has been configured for the following operating conditions by default: • VIN = 5V to 12V • VOUT = 1V • IMAX = 80A • fSW = 364kHz The optional ZLUSBEVAL3Z (USB to PMBus adapter) is provided with this evaluation board, which connects the evaluation board to a PC to activate the PMBus communication interface. The PMBus command set is accessed by using the PowerNavigator™ evaluation software from a PC running Microsoft Windows. The ISL8273MEVAL1Z can operate in pin-strap mode without needing the ZLUSBEVAL3Z adapter or PMBus communication. • Peak efficiency: >90% at 70% load • Output ripple: <10mVP-P • ASCR gain = 200, ASCR residual = 90 • On/off delay = 5ms; On/off ramp time = 5ms Ordering Information References PART NUMBER DESCRIPTION ISL8273MEVAL1Z ISL8273M datasheet ISL8273M evaluation board, ZLUSBEVAL3Z adapter, USB cable INTER-DEVICE CONNECTION (OPTIONAL) VOUT 1V (CAN BE ADJUSTED 0.6V TO 2.5V) DDC VIN SYNC VIN 5V TO 12V VOUT VDD EN PG PMBus DONGLE CONNECTION (OPTIONAL) SDA SCL ISL8273M VSENP VSENN SALRT FIGURE 1. BLOCK DIAGRAM August 7, 2015 UG036.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015. All Rights Reserved Intersil (and design), PowerNavigator, ChargeMode and Digital-DC are trademarks owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. User Guide 036 PGOOD LED INTERCONNECTS DDC AND SYNC BETWEEN BOARDS ENABLE SWITCH INTERCONNECTS DDC AND SYNC BETWEEN BOARDS TO DAISY CHAIN PMBus CONNECTION CONNECT TO ZLUSBEVAL3Z DONGLE. FOR MULTIPLE BOARD EVALUATION, CONNECT TO PMBus DONGLE OUT CONNECTION OF OTHER BOARD VOUT REGULATION MONITOR FIGURE 2. TOP SIDE RESISTOR PLACEHOLDERS FIGURE 3. BOTTOM SIDE Submit Document Feedback 2 UG036.0 August 7, 2015 User Guide 036 Recommended Equipment • DC power supply with minimum 15V/40A sourcing capacity • Electronic load capable of sinking current up to 80A • Digital Multimeters (DMMs) • Oscilloscope with higher than 100MHz bandwidth Functional Description The ISL8273MEVAL1Z provides all circuitry required to evaluate the features of the ISL8273M. A majority of the features of the ISL8273M, such as compensation-free ChargeMode™ control, soft-start delay and ramp times, supply sequencing and voltage margining are available on this evaluation board. For sequencing evaluation, the board can be connected to any Intersil digital module evaluation board that supports the DDC bus. placeholder location on bottom layer. Refer to the “Switching Frequency Resistor Settings” table in the ISL8273M datasheet for recommended values. 11. To change soft-start/stop delay and ramp time, disconnect board from the setup and populate a 1% standard 0603 resistor at R6 placeholder location on bottom layer. Refer to the “Soft Start/Stop Resistor Settings” table in the ISL8273M datasheet for recommended values. 12. To change UVLO, disconnect board from the setup and populate a 1% standard 0603 resistor at the R6 placeholder location on bottom layer. Refer to the “UVLO Resistor Settings” table in the ISL8273M datasheet for recommended values. Notice that the UVLO programming shares the same pin with soft-start/stop programming. Figures 2 and 3 show the board images of the ISL8273MEVAL1Z evaluation board. 13. To change ASCR gain and residual, disconnect board from the setup and populate a 1% standard 0603 resistor at the R7 placeholder location on bottom layer. Refer to the “ASCR Resistor Settings” table and the design guide matrix in the ISL8273M datasheet for recommended values. Quick Start Guide PMBus Option Pin-strap Option ISL8273MEVAL1Z can be evaluated for all features using the provided ZLUSBEVAL3Z dongle and PowerNavigator™ evaluation software. Follow these steps to evaluate theISL8273M with PMBus option. ISL8273MEVAL1Z can be configured in pin-strap mode with standard 1% 0603 resistors. PMBus interface is not required to evaluate ISL8273M in pin-strap mode. Output voltage (VOUT), switching frequency (fSW), soft-start/stop delay and ramp time, input undervoltage protection (UVLO) threshold, ASCR gain and residual, and device PMBus address can be changed by populating recommended resistors at placeholders provided in the evaluation board. By default, the evaluation board operates in pin-strap mode and regulates at VOUT = 1V, fSW = 364kHz, soft-start/stop delay time = 5ms, soft-start/stop ramp time = -5ms to 5ms, UVLO = 4.5V, ASCR gain = 200, ASCR residual = 90 and PMBus address = 28h. Follow these steps to evaluate the ISL8273M in pin-strap mode. 1. Set ENABLE switch to “DISABLE”. 2. Connect Load to VOUT lug connectors (J7-J8 and J9-J10). 3. Connect power supply to VIN connectors (J5 and J6). Make sure power supply is not enabled when making connection. 4. Turn power supply on. 5. Set ENABLE switch to “ENABLE”. 6. Measure 1V VOUT at probe point labeled “VOUT REGULATION MONITOR” (J11). 7. Observe switching frequency of 364kHz at probe points labeled “PHASE1” (TP10) and “PHASE2” (TP11). 8. To measure the module efficiency, connect the multimeter voltage probes at probe points labeled “VIN” (TP1), “GND” (TP2) and “VOUT” (TP12). 9. To change VOUT, disconnect board from the setup and populate a 1% standard 0603 resistor at RVSET placeholder location on bottom layer. Refer to the “Output Voltage Resistor Settings” table in the ISL8273M datasheet for recommended values. By default, VOUT_MAX is set to 110% of VOUT set by pin-strap resistor. 10. To change switching frequency, disconnect board from the setup and populate a 1% standard 0603 resistor at the RFSET Submit Document Feedback 3 1. Install PowerNavigator™ software from the following Intersil website: www.intersil.com/powernavigator 2. Set ENABLE switch to “DISABLE”. 3. Connect Load to VOUT lug connectors (J7-J8 and J9-J10). 4. Connect power supply to VIN connectors (J5 and J6). Make sure power supply is not enabled when making connection. 5. Connect the ZLUSBEVAL3Z dongle (USB to PMBus™ adapter) to the ISL8273MEVAL1Z board using the 6-pin male connector labeled “PMBus DONGLE IN”. 6. Turn power supply on. 7. Connect supplied USB cable from computer USB to ZLUSBEVAL3Z dongle. 8. Launch PowerNavigator™ software. 9. It is optional to load a predefined setup from a configuration file using the PowerNavigator™ software. The ISL8273M device on the board operates in pin-strap mode from factory default, but the user may modify the operating parameters through the evaluation software or by loading a predefined set-up from a configuration file. A sample “Configuration File” on page 7 is provided and can be copied to a notepad editor to make desired changes. The default pin-strap configurations will be overwritten if a user-defined configuration file is loaded. 10. Set the ENABLE switch to “ENABLE”. Alternatively, the PMBus ON_OFF_CONFIG and OPERATION commands may be used from the PowerNavigator™ software to allow PMBus Enable. 11. Monitor and configure the ISL8273MEVAL1Z board using the PMBus commands in the evaluation software. To store the configuration changes, disable the module and use the command STORE_USER_ALL. To restore factory default UG036.0 August 7, 2015 User Guide 036 settings, disable the module and use the command RESTORE_FACTORY and STORE_USER_ALL. 12. PowerNavigator™ tutorial videos are available on the Intersil website. www.intersil.com/powernavigator 13. For sequencing via Digital-DC Bus (DDC) or to evaluate multiple Intersil digital power products using a single ZLUSBEVAL3Z dongle, the ISL8273M can be daisy chained with other digital power evaluation boards. The PMBus address can be changed by placing a 1% standard 0603 resistor at the R4 placeholder location on the bottom layer. Refer to the “SMBus Address Resistor Selection” table in the ISL8273M datasheet for recommended values. Evaluation Board Information If input voltage is less than 5.3V, tie the VCC test point directly to VIN or to a separate 5V power supply for best efficiency. If external synchronization is used, connect the SYNC test point to the external clock. Note that the external clock signal should be active before the module is enabled. VOUT Transient Response Check The ISL8273MEVAL1Z board has a built-in transient load test circuit (see the schematic in Figure 4). A 100A N-Channel MOSFET (Manufacturer PN: BSC010NE2LSI) is connected across VOUT and PGND next to the remote voltage sensing location (CVSEN). A 10mΩ current-sense resistor R54 is used for monitoring the drain-to-source current of the MOSFET. For a transient load test, inject the gate drive pulse signal at J16. The load current can be monitored through J15. Because the MOSFET will operate in the saturation region instead of the linear region when the gate turn-on signal is applied, the pulse width and duty cycle of the gate signal must be limited small enough to avoid MOSFET overheating (recommended duty cycle should be less than 2%). The amplitude of the gate driver pulse voltage can be adjusted to obtain a desired transient load current step size. VOUT BSC010NE2LSI J16 J15 47k 10m TRANSIENT LOAD MONITOR TRANSIENT LOAD PULSE INPUT FIGURE 4. SCHEMATIC FOR TRANSIENT LOAD MEASUREMENT Thermal Considerations and Current Derating Board layout is very critical in order to make the module operate safely and deliver maximum allowable power. To work in the high temperature environments and carry large currents, the board layout needs to be carefully designed to maximize thermal performance. To achieve this, select enough trace width, copper weight and the proper connectors. The ISL8273MEVAL1Z evaluation board is designed for running 80A at room temperature without additional cooling systems needed. However, if the output voltage is increased or the board is operated at elevated temperatures, then the available current is derated. Refer to the derated current curves in the ISL8273M datasheet to determine the maximum output current the evaluation board can supply. JA is measured by inserting a thermocouple inside the module to measure peak junction temperature. PCB Layout Guidelines The ISL8273MEVAL1Z board layout has been optimized for electrical performance, low loss and good thermal performance. The key features of the ISL8273MEVAL1Z layout are: • Large PGND planes and a separate SGND plane. The SGND plane is connected to PGND on the second layer with a single point connection. Multiple vias are used for small pins such as J16, H16, K16, M5, M14, M17 and N5 to connect to inner SGND or PGND layer. • Ceramic capacitors between VIN and PGND, VOUT and PGND, and bypass capacitors between VDD, VDRV and the ground plane are placed close to the module to minimize high frequency noise. Some output ceramic capacitors are placed close to the VOUT pads in the direction of the load current path to create a low impedance path for the high frequency inductor ripple current. • Large copper areas are used for power path (VIN, PGND, VOUT) to minimize conduction loss and thermal stress. Multiple vias are used to connect the power planes in different layers. • Remote sensing traces are connected from the regulation point to VSENP and VSENN pins. The two traces are placed in parallel, to achieve tight output voltage regulation. The regulation point is on the right side of the board in between the VOUT power lugs and the PGND power lugs. • Multiple vias are used to connect PAD14 and 16 (SW1 and SW2) to inner layers for better thermal performance. The inner layer SW1 and SW2 traces are limited in area and are surrounded by PGND planes to avoid noise coupling. Caution was taken that no sensitive traces, such as the remote sensing traces, were placed close to these noisy planes. • SWD1 (L3) and SWD2 (P10) pins are connected to SW1 and SW2 pads respectively with short loop wires of 40mil width. The wire width should be at least 20mils. Submit Document Feedback 4 UG036.0 August 7, 2015 EN FROM PREQUEL VCC C9 TP1 FROM PREQUEL J1 SALRT 2 4 6 1 2 3 4 5 6 J3 SYNC 1 3 5 1 2 3 4 5 6 J2 1 3 5 DISABLE VIN 2 4 6 DDC TO SEQUEL TO SEQUEL 1 SW1 TP8 5 ENABLE 3 2 SDA SCL 1 VI2C 3 10K R10 TP9 10UF Submit Document Feedback ISL8273MEVAL1Z Schematic J4 2 4 6 1 2 3 4 5 6 1 3 5 1 2 3 4 5 6 2 4 6 J7 VCC COMMUNICATION CONNECTION J8 E14 D14 V25 TP5 EN NC J11 1 2 200 R13 22UF CVSEN C25 470UF C24 470UF C23 100UF C22 100UF C21 100UF C20 100UF C19 470UF C18 470UF C16 100UF C15 100UF 470UF C32 470UF C31 100UF C30 100UF C29 100UF C28 100UF VOUT 0.01 J15 R54 DNP R7 10UF 2 7 3 6 4 R57 10UF 10UF 8 J9 VOUT 5 J10 BSC010NE2LSI C12 47K 1 3 GRN I00000273 PGND TIED TO SGND D1 C17 1 J16 RED 10UF C11 VCC 1.5K C10 TP4 10UF C8 R8 C14 VOUT PG U2 R9 1.5K 0 TP11 VR6 TP7 GND R12 PHASE2 VR5 TP6 VCC 100UF VSENN C27 PGND PGND PGND PGND PGND PAD1 PAD3 PAD5 L3 PAD14 PAD13 H4 H3 PAD2 PAD4 PAD7 P11 PAD16 PAD15 E15 F15 D5 G14 C13 VDRV1 VDRV1 VDD VR VR55 VIN VIN VIN U1 N6 N16 M1 G15 L14 M13 R6 DNP R5 21.5K RVSET DNP 17.8K RFSET DNP R4 ISL8273MAIRZ 0 VOUT PGND PGND SWD1 SW1 PGND VSENP VSENN VOUT PGND PGND SWD2 SW2 PGND NC NC PG ASCR PAD10 PAD12 M5 M17 N5 R1 R2 6.65K C1 0.1UF UVLO VMON R11 User Guide 036 100K TP3 VDRV VDRV VCC V25 VR5 VR6 R3 4.75K SCL SDA SALRT SA DDC SYNC NC NC VSET NC MGN CS SS/UVLO VMON SGND SGND SGND SGND SGND TP12 100UF R8 R17 L2 M10 K14 PAD8 PAD9 PAD11 VCC C13 C12 C11 C10 E4 D13 F4 G4 C6 C5 C8 C7 D4 C9 H16 J16 K16 M14 PAD6 TP10 VSENP TP2 SCL SDA SALRT SA DDC SYNC INTER-DEVICE CONNECTION VOUT PHASE1 GND J6 VR55 C26 47UF C2 22UF C7 47UF C6 22UF C5 22UF C4 C3 470UF 5 22UF J5 DRAWN BY: PG 3 PG TIM KLEMANN RELEASED BY: 4 2 UNDER DUT 2 TITLE: DATE: TIM KLEMANN 2N7002L ENGINEER: 11/14/2014 DATE: UPDATED BY: Q1 1 DATE: 04/21/2015 ISL8273M 80A EVALUATION BOARD SCHEMATIC TESTER MASK# FILENAME: FIGURE 5. SCHEMATIC DATE: TAO TAO HRDWR ID REV. ISL8273MEVAL1Z ISL8273M/ISL8273MEVAL1ZA SHEET 1 OF A1 1 UG036.0 August 7, 2015 User Guide 036 Bill of Materials REFERENCE DESIGNATORS QTY C1 1 PANASONIC ECJ-2VB1E104K CAP, SMD, 0805, 0.1µF, 25V, 10%, X7R, ROHS CVSEN 1 JOHANSON DIELECTRICS INC 6R3R15X226KV4E CAP, SMD, 0805, 22µF, 6.3V, 10%, X5R, ROHS C8, C9, C10, C11, C12, C17 6 VENKEL C1206X7R250-106KNE CAP, SMD, 1206, 10µF, 25V, 10%, X7R, ROHS C13-C16, C20-C23, C27-C30 12 MURATA GRM31CR60J107ME39L CAP, SMD, 1206, 100µF, 6.3V, 20%, X5R, ROHS C2, C4, C5, C6 4 MURATA GRM32ER71C226KE18L CAP, SMD, 1210, 22µF, 16V, 10%, X7R, ROHS C7, C26 2 TDK C3225X5R1C476M CAP, SMD, 1210, 47µF, 16V, 20%, X5R, ROHS C18, C19, C24, C25, C31, C32 6 SANYO 6TPE470MI CAP-POSCAP, LOW ESR, SMD, D4, 470µF, 6.3V, 20%, 18mΩ, ROHS C3 1 PANASONIC EEE-1EA471P CAP, SMD, 10mm, 470µF, 25V, 20%, ALUM.ELEC., 380mA, ROHS J5, J6 2 JOHNSON COMPONENTS 108-0740-001 CONN-JACK, BANANA-SS-SDRLESS, VERTICAL, ROHS TP1-TP12 12 KEYSTONE 5005 CONN-COMPACT TEST PT, VERTICAL, RED, ROHS J11, J15, J16 3 BERG/FCI 69190-202HLF CONN-HEADER, 1x2, RETENTIVE, 2.54mm, 0.230x0.120, ROHS J2, J4 2 SAMTEC SSQ-103-02-T-D-RA CONN-SOCKET STRIP, TH, 2x3, 2.54mm, TIN, R/A, ROHS J1, J3 2 SAMTEC TSW-103-08-T-D-RA CONN-HEADER, 2x3, BRKAWY, 2.54mm, TIN, R/A, ROHS D1 1 LUMEX SSL-LXA3025IGC-TR LED, SMD, 3x2.5mm, 4P, RED/GREEN, 12/20MCD, 2V U1 1 INTERSIL ISL8273MAIRZ IC-80A DIGITAL DC/DC MODULE, 42P, HDA, ROHS Q1 1 ON SEMICONDUCTOR 2N7002LT1G TRANSISTOR-MOS, N-CHANNEL, SMD, SOT23, 60V, 115mA, ROHS U2 1 INFINEON TECHNOLOGY TRANSIST-MOS, N-CHANNEL, 8P, PG-TDSON-8, 25V, 100A, ROHS R4-R7 0 R11, R12 2 VENKEL CR0603-10W-000T RES, SMD, 0603, 0Ω, 1/10W, TF, ROHS R10 1 KOA RK73H1JT1002F RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS R1 1 VENKEL CR0603-10W-1003FT RES, SMD, 0603, 100k, 1/10W, 1%, TF, ROHS R8, R9 2 VENKEL CR0603-10W-1501FT RES, SMD, 0603, 1.5k, 1/10W, 1%, TF, ROHS RFSET 1 PANASONIC ERJ-3EKF1782V RES, SMD, 0603, 17.8k, 1/10W, 1%, TF, ROHS R13 1 VENKEL CR0603-10W-2000FT RES, SMD, 0603, 200Ω, 1/10W, 1%, TF, ROHS RVSET 1 VENKEL CR0603-10W-2152FT RES, SMD, 0603, 21.5k, 1/10W, 1%, TF, ROHS R57 1 YAGEO RC0603FR-0747KL RES, SMD, 0603, 47k, 1/10W, 1%, TF, ROHS R3 1 VENKEL CR0603-10W-4751FT RES, SMD, 0603, 4.75k, 1/10W, 1%, TF, ROHS R2 1 YAGEO RC0603FR-076K65L RES, SMD, 0603, 6.65k, 1/10W, 1%, TF, ROHS R54 1 VISHAY WSL2512R0100FEA RES-CURR.SENSE, SMD, 2512, 0.01Ω, 1W, 1%, ROHS SW1 1 C&K COMPONENTS GT13MCBE SWITCH-TOGGLE, THRU-HOLE, 5PIN, SPDT, 3POS, ON-OFFON, ROHS J7-J10 4 BERG/FCI KPA8CTP HDWARE,MTG, CABLE TERMINAL,6-14AWG, LUG and SCREW, ROHS Submit Document Feedback 6 MANUFACTURER MANUFACTURER PART BSC010NE2LSI DESCRIPTION RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER UG036.0 August 7, 2015 User Guide 036 Configuration File Sample Configuration File for ISL8273M Module. Copy and paste (from RESTORE_FACTORY TO ### End User Store) to a notepad and save it as Confile_file_name.txt. The # symbol is used for a comment line. Following settings are already loaded to ISL8273M module as factory defaults. RESTORE_FACTORY STORE_USER_ALL # VOUT Related VOUT_COMMAND VOUT_MAX VOUT_MARGIN_HIGH VOUT_MARGIN_LOW VOUT_OV_FAULT_LIMIT VOUT_OV_FAULT_RESPONSE VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT VOUT_UV_FAULT_LIMIT VOUT_UV_FAULT_RESPONSE POWER_GOOD_ON VOUT_TRANSITION_RATE VOUT_DROOP VOUT_CAL_OFFSET # IOUT Related IOUT_CAL_GAIN IOUT_CAL_OFFSET IOUT_OC_FAULT_LIMIT IOUT_UC_FAULT_LIMIT MFR_IOUT_OC_FAULT_RESPONSE MFR_IOUT_UC_FAULT_RESPONSE ISENSE_CONFIG # Other Faults OT_FAULT_LIMIT OT_FAULT_RESPONSE OT_WARN_LIMIT UT_WARN_LIMIT UT_FAULT_LIMIT UT_FAULT_RESPONSE VIN_OV_FAULT_LIMIT VIN_OV_FAULT_RESPONSE VIN_OV_WARN_LIMIT VIN_UV_WARN_LIMIT VIN_UV_FAULT_LIMIT VIN_UV_FAULT_RESPONSE #Enable, Timing and Sequence Related ON_OFF_CONFIG TON_DELAY TON_RISE TOFF_DELAY TOFF_FALL POWER_GOOD_DELAY FREQUENCY_SWITCH SYNC_CONFIG SEQUENCE # Manufacturer Related MFR_ID MFR_MODEL MFR_REVISION MFR_LOCATION MFR_DATE MFR_SERIAL USER_DATA_00 # Advance Settings USER_CONFIG DDC_CONFIG DDC_GROUP # Loop Compensation ASCR_CONFIG STORE_USER_ALL ### End User Store Submit Document Feedback 7 # reset device to the factory setting # Clears user memory space 0x80 # Disable and no retry 0x80 # Disable and no retry 0xba00 0x0000 0x0000 # 1 mV/us # 0 mV/A # 0 mV/A 0xb370 0x0000 # 0.86 mV/A #0A 0x80 0x80 # Disable and no retry # Disable and no retry 0xebe8 0x80 0xeb70 0xdc40 0xe530 0x80 0xd380 0x80 0xd353 0xca5d 0xca40 0x80 # 125 °C # Disable and no retry # 110 °C # -30 °C # -45 °C # Disable and no retry # 14 V # Disable and no retry # 13.3 V # 4.73 V # 4.5 V # Disable and no retry 0x16 0xca80 0xca80 0xca80 0xca80 0xca00 # Pin Enable, Soft Off # 5 ms # 5 ms # 5 ms # 5 ms # 4 ms 0x00 0x0000 # Use Pin-strap for FSW setting # Sequence Disabled Intersil Corp Rev-1 Milpitas, CA 09/05/2014 1234 Module # Example Only # Example Only # Example Only # Example Only # Example Only # Example Only # Example Only 0x80 0x0a01 0x00000000 # ASCR on for Start, Open Drain PG # DDC rail ID = 10, 2-phase # All Broadcast disabled # ASCR gain = , Residual = # Store all above settings to NVRAM UG036.0 August 7, 2015 User Guide 036 Layout FIGURE 6. SILKSCREEN TOP FIGURE 7. TOP LAYER COMPONENT SIDE Submit Document Feedback 8 UG036.0 August 7, 2015 User Guide 036 Layout (Continued) FIGURE 8. LAYER 2 FIGURE 9. LAYER 3 Submit Document Feedback 9 UG036.0 August 7, 2015 User Guide 036 Layout (Continued) FIGURE 10. LAYER 4 FIGURE 11. LAYER 5 Submit Document Feedback 10 UG036.0 August 7, 2015 User Guide 036 Layout (Continued) FIGURE 12. LAYER 6 FIGURE 13. LAYER 7 Submit Document Feedback 11 UG036.0 August 7, 2015 User Guide 036 Layout (Continued) FIGURE 14. BOTTOM LAYER SOLDER SIDE FIGURE 15. SILKSCREEN BOTTOM Submit Document Feedback 12 UG036.0 August 7, 2015 User Guide 036 Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. 80 80 70 421kHz 70 60 50 READ_IOUT READ_IOUT 60 533kHz 40 300kHz 30 889kHz 20 50 +25°C +65°C 40 30 +45°C 20 10 10 0°C 0 0 10 20 30 40 50 60 70 0 80 0 10 80 40 50 60 70 80 80 70 471kHz 70 60 60 READ_IOUT READ_IOUT 30 FIGURE 17. OUTPUT CURRENT MEASUREMENT ACCURACY AT VIN = 12V, VOUT = 1V, fSW = 300kHz FOR VARIOUS AMBIENT TEMPERATURES FIGURE 16. OUTPUT CURRENT MEASUREMENT ACCURACY AT VIN = 12V, VOUT = 1V, TA = +25°C FOR VARIOUS SWITCHING FREQUENCIES 50 889kHz 571kHz 40 30 20 +25°C +65°C 50 40 30 +45°C 20 10 0 20 ACTUAL OUTPUT CURRENT (A) ACTUAL OUTPUT CURRENT (A) 670kHz 0 10 20 10 30 40 50 60 70 0 80 0°C 0 10 ACTUAL OUTPUT CURRENT (A) 20 30 40 50 60 100 94 95 2.5V, 530kHz 80 FIGURE 19. OUTPUT CURRENT MEASUREMENT ACCURACY AT VIN = 12V, VOUT = 2.5V, fSW = 571kHz FOR VARIOUS AMBIENT TEMPERATURES FIGURE 18. OUTPUT CURRENT MEASUREMENT ACCURACY AT VIN = 12V, VOUT = 2.5V, TA = +25°C FOR VARIOUS SWITCHING FREQUENCIES 1.8V, 346kHz 70 ACTUAL OUTPUT CURRENT (A) 1.2V, 300kHz 2.5V 92 85 1V, 300kHz 1.5V, 346kHz 80 0.8V, 300kHz 75 70 65 EFFICIENCY (%) EFFICIENCY (%) 1.8V 90 90 88 10 20 30 40 50 60 70 80 LOAD CURRENT (A) FIGURE 20. EFFICIENCY vs OUTPUT CURRENT AT VIN = 12V, FOR VARIOUS OUTPUT VOLTAGES Submit Document Feedback 13 1.2V 86 84 82 0 1.5V 80 300 1V 0.8V 350 400 450 500 550 FREQUENCY (kHz) 600 650 700 FIGURE 21. EFFICIENCY vs SWITCHING FREQUENCY AT VIN = 12V, IOUT = 70A FOR VARIOUS OUTPUT VOLTAGES UG036.0 August 7, 2015 User Guide 036 Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued) ASCR GAIN = 140 RESIDUAL = 90 ASCR GAIN = 220 RESIDUAL = 90 VOUT (50mV/DIV) VOUT (100mV/DIV) IOUT (20A/DIV) IOUT (20A/DIV) 50µs/DIV 50µs/DIV FIGURE 22. LOAD TRANSIENT RESPONSE AT VIN = 12V, VOUT = 1V, IOUT = 0A TO 40A (>100A/μs), fSW = 300kHz. COUT = 14 x 100μF CERAMIC + 6 x 470μF POSCAP FIGURE 23. LOAD TRANSIENT RESPONSE AT VIN = 12V, VOUT = 2.5V, IOUT = 0A TO 40A (>100A/μs), fSW = 800kHz. COUT = 6 x 100μF CERAMIC + 3 x 470μF POSCAP ENABLE ENABLE VOUT (500mV/DIV) VOUT (500mV/DIV) POWER GOOD POWER GOOD 5ms/DIV 5ms/DIV FIGURE 24. SOFT-START AT VIN = 12V, VOUT = 1V, TON_DELAY = 5ms, TON_RISE = 5ms, POWER_GOOD_DELAY = 3ms FIGURE 25. SOFT-STOP AT VIN = 12V, VOUT = 1V, TOFF_DELAY = 5ms, TOFF_FALL = 5ms SW1 (10V/DIV) SW1 (10V/DIV) SW2 (10V/DIV) SW2 (10V/DIV) VOUT (500mV/DIV) VOUT (500mV/DIV) IIN5A/DIV 50µs/DIV FIGURE 26. OUTPUT SHORT-CIRCUIT PROTECTION AT VIN = 12V, VOUT = 1V, fSW = 421kHz Submit Document Feedback 14 50µs/DIV FIGURE 27. OUTPUT OVERVOLTAGE PROTECTION AT VIN = 12V, VOUT = 1V, fSW = 421kHz, VOUT_OV_FAULT_LIMIT = 1.15V UG036.0 August 7, 2015 User Guide 036 Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued) SW1 (10V/DIV) SW1 (10V/DIV) SW2 (10V/DIV) SW2 (10V/DIV) VOUT (1V/DIV) VOUT (1V/DIV) IIN (5A/DIV) IIN (5A/DIV) 50ms/DIV 50ms/DIV FIGURE 28. OUTPUT SHORT-CIRCUIT PROTECTION WITH CONTINUOUS RETRY ENABLED (HICCUP MODE), VIN = 12V, VOUT = 1V MODULE #1:VOUT = 1V MODULE #2:VOUT = 1.5V MODULE #3:VOUT = 2.5V VOUT_3 (1V/DIV) FIGURE 29. OUTPUT SHORT-CIRCUIT RECOVERY FROM CONTINUOUS RETRY (HICCUP MODE). VIN = 12V, VOUT = 1V MODULE #1:VOUT = 1V MODULE #2:VOUT = 1.5V MODULE #3:VOUT = 2.5V VOUT_3 (1V/DIV) VOUT_2 (1V/DIV) VOUT_2 (1V/DIV) VOUT_1 (1V/DIV) VOUT_1 (1V/DIV) ENABLE ENABLE 5ms/DIV FIGURE 30. SOFT-START WITH OUTPUT SEQUENCING AT VIN = 12V, THREE ISL8273MEVAL1Z BOARDS ARE CONNECTED IN DAISY CHAIN 5ms/DIV FIGURE 31. SOFT-STOP WITH OUTPUT SEQUENCING AT VIN = 12V, THREE ISL8273MEVAL1Z BOARDS ARE CONNECTED IN DAISY CHAIN 10V/DIV SW1 OF MODULE #1 SW2 OF MODULE #1 10V/DIV VOUT (200mV/DIV) SW1 OF MODULE #2 10V/DIV SW2 OF MODULE #2 10V/DIV 5ms/DIV FIGURE 32. DYNAMIC VOLTAGE SCALING WITH VOUT CHANGE FROM 1V TO 1.1V, VIN = 12V, VOUT_TRANSITION_RATE = 1mV/µs Submit Document Feedback 15 1µs/DIV FIGURE 33. PHASE SPREADING/INTERLEAVING, TWO ISL8273MEVAL1Z BOARDS ARE CONNECTED IN DAISY CHAIN, MODULE #1 RAIL POSITION: 0; MODULE #2 RAIL POSITION:4. VIN = 12V, VOUT_1 = 1.8V, VOUT_2 = 1.2V, fSW = 421kHz UG036.0 August 7, 2015 User Guide 036 Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued) FIGURE 34. THERMAL IMAGE AT VIN = 12V, VOUT = 1V, IOUT = 80A, fSW = 300kHz, TA = +25°C, NO AIRFLOW FIGURE 35. THERMAL IMAGE AT VIN = 12V, VOUT = 1.8V, IOUT = 80A, fSW = 350kHz, TA = +25°C, NO AIRFLOW Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the document is current before proceeding. For information regarding Intersil Corporation and its products, see www.intersil.com Submit Document Feedback 16 UG036.0 August 7, 2015