MAX20034HFEVKIT#

MAX20034 Evaluation Kit General Description The MAX20034 evaluation kit (EV kit) is a fully assembled and tested application circuit that simplifies the evaluation of the MAX20034 high-efficiency 400kHz/2.2MHz, 36V, dual buck controller IC. This EV kit operates from 3.5V to 42V supply and provides two synchronous step-down outputs by switching at 400kHz/2.2MHz, with each one 180° out of phase from the other. The frequency and output voltages can be adjusted using external resistors. SYNC input programmability enables three frequency modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and synchronized external clock frequency. Benefits and Features ● Dual High-Voltage Step-Down Controllers to Minimize Board-Area Occupancy ● Meets Stringent OEM Module Power Consumption and Performance Specifications ● 17µA Quiescent Current in Skip Mode ● ±1.5% Output-Voltage Accuracy: 5.0V/3.3V, Fixed or Adjustable by External Resistor-Divider ● EMI Reduction Features and Adjustable FixedFrequency Operation to Reduce Signal Interference ● Optimized Application Layout and Components for Quick Design Implementation ● Jumpers and Test Points on Key Nodes for Simplified Evaluation ● Proven PCB Layout ● Fully Assembled and Tested Ordering Information appears at end of data sheet. 319-100105; Rev 0; 11/17 Evaluates: MAX20034 Quick Start Required Equipment ● MAX20034 EV kit ● Adjustable DC power supply (PS1) ● Two digital multimeters (DMM1 and DMM2) ● Two electronic loads (EL1 and EL2) Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) Verify that all jumpers are in their default positions, as shown in Table 1. Preset the power supply to 14V. Turn off the power supply. Preset the electronic loads to 2.5A. Turn off the electronic loads. Connect the positive lead of the power supply to the VBATTF PCB pad on the EV kit; connect the negative lead to the neighboring PGND PCB pad. Connect the positive terminal of electronic load EL1 to the VOUT1 PCB pad; connect the negative lead to the PGND1 pad. Connect the positive terminal of electronic load EL2 to the VOUT2 PCB pad; connect the negative lead to the PGND2 PCB pad. Turn on the power supply. Verify that voltage across the VOUT1 and PGND1 PCB pads is 5V, and 3.3V between the VOUT2 and PGND2 PCB pads. Turn on the electronic loads. Verify that voltage across the VOUT1 and PGND PCB pads is 5V ±1.5%. Verify that voltage across the VOUT2 and PGND2 PCB pads is 3.3V ±1.5%. Turn off the electronic loads. Turn off the power supply. MAX20034 Evaluation Kit Evaluates: MAX20034 Table 1. Default Jumper Settings JUMPER DEFAULT SHUNT POSITION JU1_EN1 Pins 2-3 Enable for VOUT1 JU2_EN2 Pins 2-3 Enable for VOUT2 FUNCTION JU3_FSYNC Pins 2-3 Mode selection between skip enabled and FPWM JU4_PGOOD1 Installed Connect PGOOD1 to BIAS by pullup resistor JU5_PGOOD2 Installed Connect PGOOD2 to BIAS by pullup resistor JU6_EXTVCC Pins 1-2 Connect EXTVCC to VOUT1, VOUT2, or AGND Note: For 3-pin connectors, pin 1 is denoted by a silkscreen triangle. Detailed Description The MAX20034 IC offers two high-voltage synchronous step-down controllers that operate at 180° out-of-phase. This device can be powered up by an input voltage supply from 3.5V to 42V and can operate in drop-out condition by running at 99% duty-cycle. It is intended for applications with mid- to high-power requirements that operate at a wide input voltage range such as during automotive coldcrank or engine stop-start conditions. The IC features a power-OK monitor, overvoltage lockout, and an undervoltage lockout. Its protection features include cycle-by-cycle current limit and thermal shutdown. It is specified for operation over the -40°C to +125°C automotive temperature range. Switching Frequency and External Synchronization The IC can operate in two modes: forced-PWM (FPWM) or skip. Skip mode has better efficiency for light-load conditions, while FPWM has fixed switching frequency across all load conditions to prevent unwanted EMI interference. When SYNC is pulled low, the device operates in skip mode for light loads and in PWM mode for heavy loads. When SYNC is pulled high, the device is forced to operate in PWM across all load conditions. SYNC pin can also be used to synchronize with an external clock frequency. In this case, MAX20034 operates at external clock frequency across all load conditions. Buck Output Monitoring (PGOOD1, PGOOD2) The EV kit provides power-good output test points (TP_ PGOOD1 and TP_PGOOD2) to monitor the status of the buck outputs (VOUT1 and VOUT2). The PGOOD1 and PGOOD2 are set to high impedance when the respective output voltages are in regulation. When the output voltages individually drop below 92% of its nominal regulated voltage, the corresponding PGOOD output is pulled to ground. Setting the Output Voltage in Buck Converters Each of the outputs has its own feedback pins (FB1 and FB2), which can be used to externally adjust the output voltages between 1 to 10V. For VOUT1, remove R1 and install a 0Ω resistor on R29. Use the following equation to calculate the required value of the resistors for R2 and R3: V  R2 R3  OUT1 − 1 =  VFB1  where VFB1 = 1V (typ) and recommended R6 = 50kΩ. For VOUT2, remove R27 and install a 0Ω resistor on R31. Use the following equation to calculate the required value of the resistors for R25 and R26: V  R25 R26  OUT2 − 1 = V  FB2  where VFB2 = 1V (typ) and recommended R6 = 50kΩ. www.maximintegrated.com Maxim Integrated │  2 MAX20034 Evaluation Kit Evaluates: MAX20034 Evaluate 400kHz or 2.2MHz Operation Order MAX20034HFEVKIT# to evaluate 2.2MHz operation. Order MAX20034EVKIT# to evaluate 400kHz operation. Table 2 lists different component selections for 2.2MHz and 400kHz switching frequency (the other components remain the same). Ordering Information TYPE fSW MAX20034EVKIT# PART EV Kit 400kHz MAX20034HFEVKIT# EV Kit 2.2MHz #Denotes RoHS compliant. Table 2. Component Selections COMPONENT fSW = 2.2MHz fSW = 400kHz C10/C28 820pF 1500pF C12/C26 2pF 2pF L1/L3 2.2µH 4.7µH R9/R20 51.1kΩ 24.9kΩ R19 12kΩ 73.2kΩ www.maximintegrated.com Maxim Integrated │  3 MAX20034 Evaluation Kit Evaluates: MAX20034 MAX20034 EV Kit Bill of Materials PART QTY C1, C2, C30, C32 4 C3, C5, C29, C31, C37-C40 8 C4, C33 2 C6, C7, C20, C35, C36 5 C8, C13, C23, C34 4 C10, C28 2 C11, C16 2 C12, C26 2 C17 1 DESCRIPTION CAPACITOR; SMT (1210); CERAMIC; 47UF; 10V; TOL=10%; MODEL=GRM SERIES; TG=-55 DEGC TO +125 DEGC; TC=X7R CAPACITOR; SMT (0402); CERAMIC CHIP; 100PF; 50V; TOL=2%; TG=-55 DEGC TO +125 DEGC; TC=C0G CAPACITOR; SMT (1210); CERAMIC; 47UF; 10V; TOL=10%; MODEL=GRM SERIES; TG=-55 DEGC TO +125 DEGC; TC=X7R CAPACITOR; SMT (1206); CERAMIC CHIP; 4.7UF ; 50V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R; AUTO CAPACITOR; SMT (0402); CERAMIC CHIP; 0.1UF; 50V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R CAPACITOR; SMT (0402); CERAMIC CHIP; 820PF; 50V; TOL=2%; TG=-55 DEGC TO +125 DEGC; TC=C0G CAPACITOR; SMT (1210); CERAMIC CHIP; 4.7UF; 50V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R; AUTO CAPACITOR; SMT (0402); CERAMIC CHIP; 2PF; 50V; TOL=0.1PF; TG=-55 DEGC TO +125 DEGC; TC=C0G CAPACITOR; SMT (CASE_D); ALUMINUM-ELECTROLYTIC; 47UF; 50V; TOL=20%; TG=-55 DEGC TO +105 DEGC; AUTO C18 1 CAPACITOR; SMT (1206); CERAMIC CHIP; 6.8UF; 16V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R C21 1 CAPACITOR; SMT (0603); CERAMIC CHIP; 2.2UF; 10V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R D2, D3 2 JU1_EN1, JU2_EN2, JU3_FSYNC 3 JU4_PGOOD1, JU5_PGOOD2 2 JU6_EXTVCC 1 L1, L3 2 L2 PGND, PGND1, PGND2, VBATT, VBATTF, VOUT1, VOUT2 1 MFG PART # MURATA, GRM32ER71A476KE15 TDK, C1005C0G1H101G050 MURATA, GRM32ER71A476KE15 TDK, CGA5L3X7R1H475K160AB TDK, CGA2B3X7R1H104K; C1005X7R1H104K050BB MURATA, GRM1555C1H821GA01 TDK, CGA6P3X7R1H475K TDK, C1005C0G1H020B050 PANASONIC, EEE-FT1H470AP TDK, C1206C685K4RAC; C3216X7R1C685K160AC MURATA, GRM188R71A225KE15; CL10B225KP8NNN DIODE; SCH; SCHOTTKY DIODE; SMT (SOD-323); PIV=30V; IF=0.2A ON SEMICONDUCTOR, BAT54H Q1, Q2, Q3, Q4 4 R1, R6, R12, R13, R22, R27 R2, R3, R7, R25, R26, R29, R31, R34 R4, R24, R28, R30 R5, R23 6 8 4 2 CONNECTOR; THROUGH HOLE; TSW SERIES; SINGLE ROW; STRAIGHT; 3PINS CONNECTOR; THROUGH HOLE; TSW SERIES; SINGLE ROW; STRAIGHT; 2PINS; -55 DEGC TO +105 DEGC EVKIT PART-CONNECTOR; MALE; THROUGH HOLE; TSW SERIES; SINGLE ROW; STRAIGHT; 4PINS EVKIT PART-INDUCTOR; SMT; SHIELDED; 2.2UH; TOL=+/-20%; 12A; NOTE: ALTERNATE FOOTPRINT IS CAPABLE TO HOST IHLP4040DZ-01; IHLP-2525CZ-L7 AND XAL50XX SERIES INDUCTOR; SMT (1206); FERRITE-BEAD; 1000; TOL=+/-25%; 1A EVK KIT PARTS; MAXIM PAD; NO WIRE TO BE SOLDERED ON THE MAXIMPAD TRAN; POWER MOSFET; SINGLE N-CHANNEL; NCH; SO-8FL; PD(55W); I-(87A); V-(40V) RESISTOR; 0402; 0 OHM; 0%; JUMPER; 0.2W; THICK FILM RESISTOR; 0402; 0 OHM; 0%; JUMPER; 0.2W; THICK FILM RESISTOR; 0402; 20 OHM; 1%; 0.063W, THICK FILM RESISTOR; 1206; 0.015 OHM; 1%; 100PPM; 0.5W; THICK FILM R9, R14, R15, R20 4 RESISTOR; 0402; 51.1K OHM; 1%; 100PPM; 0.063W; THICK FILM VISHAY DALE, CRCW040251K1FK R10, R11, R17, R18 R16 4 1 RESISTOR; 0603; 0 OHM; 0%; JUMPER; 0.1W; THICK FILM RESISTOR; 0402; 100K; 1%; 100PPM; 0.0625W; THICK FILM VISHAY DALE, CRCW06030000Z0 VISHAY DALE, CRCW0402100KFK R19 1 RESISTOR; 0402; 12.1K; 1%; 100PPM; 0.0625W; THICK FILM VISHAY DALE, CRCW040212K1FK TP_FSYNC, TP_PGOOD1, TP_PGOOD2 3 TESTPOINT WITH 1.80MM HOLE DIA, RED, MULTIPURPOSE; NOT FOR COLD TEST KEYSTONE, 5010 U1 1 EVKIT PART-IC; AUTOMOTIVE START-STOP POWER SUPPLY; QFN28-EP; PACKAGE CODE: T2855Y-5C MAX20034ATIR/VY+ MAX20034 — 1 PCB: MAX20034EVKIT MAX20034 www.maximintegrated.com 7 SAMTEC, TSW-103-07-T-S SAMTEC, TSW-102-07-T-S SAMTEC, TSW-104-07-L-S VISHAY DALE, IHLP4040DZER2R2M01 FAIR-RITE, 2512061027Y1 MAXIMPAD ON SEMICONDUCTOR, NVMFS5C456NLT1G VISHAY DALE, CRCW04020000Z0EDHP VISHAY DALE, CRCW04020000Z0EDHP VISHAY DALE, CRCW040220R0FK LRC-LRF1206LF-01-R015F Maxim Integrated │  4 PGND1 VOUT1 BIAS C4 OPEN 0402 0 R1 C3 OPEN 0402 C2 47UF 1210 R2 R29 OPEN 0402 AGND R3 OPEN 0402 OPEN 0402 C1 47UF 1210 VOUT1 OPEN 0402 C5 R5 0.015 1206 R6 0 0402 1 R7 0402 2 C7 4.7UF 1206 OPEN 2.2UH L1 C6 4.7UF 1206 IHLP4040DZER2R2M01 VBAT Q1 PGND VBATT C11 OPEN 1210 AGND 20 0402 R28 20 0402 R4 NVMFS5C456NLT1G C8 0.1UF 0402 D S G Q2 S G D 5 3 2 1 5 1 3 3 0402 C10 820PF 3 2 1 4 0603 0 R10 1 1 L2 OPEN C16 OPEN 1210 2 JU6_EXTVCC 0402 C12 2PF R9 51.1K 0402 C37 100PF NVMFS5C456NLT1G 4 C13 0.1UF 0402 OUT1 FB1 5 6 C17 47UF VBATTF COMP1 CS1 4 7 PGND1 DL1 LX1 3 2 1 0603 0 R11 BIAS 1 4 4 VOUT2 2 2 VOUT1 D2 C39 OPEN 28 VBAT 2 A C R12 AGND C20 4.7UF 1206 JU2_EN2 C22 0402 OPEN 2 D3 MAX20034 U1 27 BST1 AGND 9 DH1 BIAS BIAS BAT54H A VBAT EXTVCC 10 C21 2.2UF 8 C18 6.8UF BAT54H 0 26 EN1 0402 25 EN2 IN 11 C R13 TP_PGOOD1 0 51.1K PGOOD1 12 0402 R14 JU4_PGOOD1 BIAS C40 OPEN C23 0.1UF 0402 1 23 24 BST2 0402 22 LX2 DH2 2 BIAS DL2 2 FOSC COMP2 FB2 OUT2 CS2 PGND2 EP 29 PGOOD2 1 3 1 AGND 4 0 0603 AGND 4 NVMFS5C456NLT1G R18 C38 100PF BIAS 15 16 17 18 19 20 21 0 R17 0603 R19 3 TP_FSYNC R16 FSYNC 13 R15 2 1 14 TP_PGOOD2 0402 51.1K JU5_PGOOD2 C26 2PF 12.1K 0402 G S D 5 Q4 1 2 3 G S D 5 0402 51.1K R20 R24 20 0402 C34 0.1UF 0402 C35 4.7UF 1206 Q3 NVMFS5C456NLT1G 20 0402 R30 1 2 3 3 0402 JU1_EN1 100K 0402 AGND 0402 1 JU3_FSYNC C28 820PF www.maximintegrated.com 2 1 R34 OPEN 0402 2.2UH L3 VBAT IHLP4040DZER2R2M01 C36 4.7UF 1206 2 R22 0 0402 R23 OPEN C29 0.015 1206 R25 OPEN 0402 C30 47UF 1210 AGND R26 0402 OPEN 0402 R31 OPEN 0 0402 R27 C31 OPEN 0402 BIAS C33 OPEN 1210 VOUT2 C32 47UF 1210 PGND2 VOUT2 MAX20034 Evaluation Kit Evaluates: MAX20034 MAX20034 EV Kit Schematic + Maxim Integrated │  5 MAX20034 Evaluation Kit Evaluates: MAX20034 MAX20034 EV Kit PCB Layouts MAX20034 EV Kit PCB Layout—Top MAX20034 EV Kit PCB Layout—Bottom MAX20034 EV Kit PCB Layout—Internal2 MAX20034 EV Kit PCB Layout—Internal3 www.maximintegrated.com Maxim Integrated │  6 MAX20034 Evaluation Kit Evaluates: MAX20034 MAX20034 EV Kit PCB Layouts (continued) MAX20034 EV Kit Component Placement Guide—Top Silkscreen www.maximintegrated.com MAX20034 EV Kit Component Placement Guide—Bottom Silkscreen Maxim Integrated │  7 MAX20034 Evaluation Kit Evaluates: MAX20034 Revision History REVISION NUMBER REVISION DATE 0 11/17 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2017 Maxim Integrated Products, Inc. │  8