MAX20029BEVKIT#

MAX20029B Evaluation Kit General Description The MAX20029B EV kit is a fully assembled and tested PCB that demonstrates the capabilities of the MAX20029B power-management IC (PMIC), which comprises four low-voltage step-down converters. The IC operates at a 3V to 5.5V input supply voltage, regulates to a 1V to 4V voltage range, and delivers up to 3A of current, while OUT3 and and OUT4 deliver up to 1.5A. The converters are high-frequency switchers, operating at 2.2MHz. The high switching frequency allows for reduced component values and sizes, including a single ceramic output capacitor on each rail. All channels have independent undervoltage/overvoltage comparators at both input and output, current limiting, and fault-flag outputs. The EV kit ships fully assembled and tested, ready for immediate evaluation of the IC. Evaluates: MAX20029B Quick Start Required Equipment ● MAX20029B EV kit ● 5V, 3A power supply ● Appropriate resistive loads (depending on selected output voltage and current capability), or electronic loads for each of the outputs ● Voltmeter Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Connect a 5V power supply to VSUP (J1) and PGND (J2). Activate the supply. 2) Verify that PG1–PG4 are at logic-low levels (J14, J34, and J44). ● 3.0V to 5.5V Input Voltage Range 3) ● 1.0V to 4.0V Output Voltages Range • Resistive Dividers Used to Set Appropriate Output Voltage Populate jumpers (J13, J33, and J43) to activate all/ selected outputs. 4) Measure the voltages on the enabled outputs. ● High Switching Frequency of 2.2MHz • Two Channels Operate 180° Out-of-Phase 5) Connect appropriate loads to all/selected outputs 6) Verify that the output voltages remain within specification. 7) Verify that PG1–PG4 are at logic-high levels. Benefits and Features ● Individual Enable and Reset Connections Available ● Loop Measurements Ready on All Channels ● Overtemperature and Short-Circuit Protection ● Proven PCB Layout ● Fully Assembled and Tested 319-100116; Rev 0; 12/17 Ordering Information appears at end of data sheet. MAX20029B Evaluation Kit Detailed Description of Hardware EV Kit Interface Evaluates: MAX20029B If the user wants to test a version of the chip with internally fixed output voltages, they can remove the appropriate resistors (R12, R32, R42), and replace the existing resistors (R11, R31, and R41) with 0Ω values to create a direct feedback connection from the VOUT_ nodes to the OUTS_ pins. The large connectors, VSUP (J1) and PGND (J2), are the main input supply points. Connect a 5V power supply across these pins. Outputs OUTS1–OUTS4 have large connectors for the output and GND nodes (labeled VOUT1–VOUT4, respectively). Each channel has independent enable and power-good test points. Installing jumpers at the dual headers marked EN1–EN4 activates the respective channel; the power-good signal for that channel can be accessed through the PG1–PG4 pins. Additional GND test points (J4–J7) are provided for ease of measurement. Three-pin headers J10, J30, and J40 are provided for ease-of-loop measurements (for each of the regulators). Evaluating IC Capabilities Ordering Information The IC installed on the board is a MAX20029BATIA/V+. It has its three outputs set through resistor-dividers on the board at VOUT1 = 1.2V, VOUT3 = 1.8V, and VOUT4 = 3.3V, with 3A current limit on VOUT1, and 1.5A current limit on the remaining two. www.maximintegrated.com An external square wave can be applied to the SYNC pin (J3) to cause the IC to switch at a different frequency. Maxim suggests using a 50% duty cycle for the square wave. The supported switching frequency (fSW) range is from 1.7MHz up to 2.5MHz. PART TYPE MAX20029BEVKIT# EV Kit #Denotes RoHS compliant. Maxim Integrated │  2 MAX20029B Evaluation Kit Evaluates: MAX20029B MAX20029B EV Kit Bill of Materials REFERENCE DESIGNATORS QTY. DESCRIPTION MFG. PART NO. C1, C2, C3, C4 4 Capacitor, 2.2µF, 25V, ceramic, X7R, 0805 Murata GRM21BR71E225KA73 C5 1 Capacitor, 0.47µF, 16V, ceramic, X7R, 0603 Murata GCM188R71C474KA55D C6, C7 7 Capacitor, 22µF, 10V, ceramic, X7R, 1210 Murata GCM32ER71A226ME12L C8, C16, C19, C26, C29, C38, C48 7 not populated — C17 1 Capacitor, 68pF, 50V, ceramic, C0G/NP0, 0402 Murata GCM1555C1H680JA16D C18, C28, C39, C49 4 Capacitor, 22µF, 10V, ceramic, X7T, 0805 Murata GRM21BD71A226ME44 C37 1 C47 1 C50 2 Capacitor, 15pF, 50V, ceramic, C0G/NP0, 0402 Capacitor, 15pF, 50V, ceramic, C0G/NP0, 0402 Capacitor, 220µF, Tant Poly, 6.3V, 2917 L1 1 inductor, 1µH, thin film, 2.5mm x 2.0mm TDK TFM252012ALMA1R0MTAA L3, L4 2 inductor, 1.5µH, thin film, 2.5mm x 2.0mm TDK TFM252012ALMA1R5MTAA Murata GCM1555C1H150JA16D Murata GCM1555C1H150JA16D Panasonic 6TPF220M5L R10, R30, R40 4 Resistor, 20 Ohms, 1%, 0402 RC0402FR-0720RL or similar R11 1 Resistor, 14.3 kOhm, 1%, 0402 ERJ-2RKF1432X or similar R12, R32, R42 3 Resistor, 71.5 kOhm, 1%, 0402 ERJ-2RKF7152X or similar R14, R24, R34, R44 R31 R41 4 1 1 RC0402FR-0710KL or similar ERJ-2RKF5762X or similar ERJ-2RKF1653X or similar U1 1 — 1 Resistor, 10 kOhm, 1%, 0402 Resistor, 57.6 kOhm, 1%, 0402 Resistor, 165 kOhm, 1%, 0402 MAX20029B PMIC, quad output, step-down, low voltage PCB: MAX20029B EV KIT www.maximintegrated.com MAX20029BATIA/V+ MAX20029BEVKIT# Maxim Integrated │  3 J22 J12 J11 J2 1 1 1 1 1 1 1 GND 1 2 3 C16 DNI C8 DNI J10 C28 22u BODE C7 DNI C18 22u Vout1-2 1 C6 DNI 47u C50 4-40 THRU C26 DNI x 1 C19 DNI 20 4-40 THRU C29 DNI R10 Bode+_1 x 1 C17 R11 J44 1 R44 10k 4-40 THRU 68p 14.3k 1 x J1 L1 1 4-40 THRU R12 71.5k 1u J34 1 R34 10k x VSUP VSUP VSUP R24 10k C2 2.2u C1 2.2u 1 PG3 PG4 J14 1 R14 10k 27 28 4 7 6 OUTS1-2 GND PV2 LX2 5 C5 0.47u VSUP 26 GND 3 8 2 PV1 23 12 10 LX1 PG1-2 VA PGND2 OUTS2 LX2 PV2 PGND1 OUTS1 LX1 PV1 PG4 PG3 PG2 PG1 U1 MAX20029B EP 29 GND 11 www.maximintegrated.com GND 24 VSUP GND SYNC PGND3 OUTS3 LX3 PV3 PGND4 OUTS4 LX4 PV4 EN4 EN3 EN2 EN1 1 OUTS3 GND 14 17 25 SYNC PV3 LX3 GND 18 16 OUTS4 22 15 PV4 LX4 20 19 21 13 9 J3 1 EN3 EN4 EN1-2 1 VSUP VSUP C3 2.2u C4 2.2u R32 71.5k 1.5u R42 71.5k 1.5u L3 L4 R31 15p C37 57.6k 15p C47 165k R41 2 1 J5 1 J4 1 20 1 1 R30 Bode+_3 20 R40 Bode+_4 EN1 J13 VSUP J7 1 J6 1 1 1 2 1 1 2 3 1 2 3 C39 22u J30 C49 22u J40 EN3 J33 Vout4 Vout3 GND C38 DNI BODE GND C48 DNI BODE 2 1 1 1 1 1 1 1 1 1 EN4 J43 J32 J31 J42 J41 MAX20029B Evaluation Kit Evaluates: MAX20029B MAX20029B EV Kit Schematic Maxim Integrated │  4 MAX20029B Evaluation Kit Evaluates: MAX20029B MAX20029B EV Kit PCB Layouts MAX20029B EV Kit Component Placement Guide—Top Assembly MAX20029B EV Kit PCB Layout—Top Layer MAX20029B EV Kit PCB Layout—Inner Layer 1 MAX20029B EV Kit PCB Layout—Inner Layer 2 www.maximintegrated.com Maxim Integrated │  5 MAX20029B Evaluation Kit MAX20029B EV Kit PCB Layout—Bottom Layer www.maximintegrated.com Evaluates: MAX20029B MAX20029B EV Kit Component Placement Guide—Bottom Assembly Maxim Integrated │  6 MAX20029B Evaluation Kit Evaluates: MAX20029B Revision History REVISION NUMBER REVISION DATE 0 12/17 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. │  7