MAX20029B Evaluation Kit Evaluates: MAX20029B General Description Quick Start The MAX20029B EV kit is a fully assembled and tested Required Equipment PCB that demonstrates the capabilities of the MAX20029B MAX20029B EV kit power-management IC (PMIC), which comprises four 5V, 3A power supply low-voltage step-down converters. The IC operates at a 3V to 5.5V input supply voltage, regulates to a 1V to Appropriate resistive loads (depending on selected 4V voltage range, and delivers up to 3A of current, while output voltage and current capability), or electronic OUT3 and and OUT4 deliver up to 1.5A. The converters loads for each of the outputs are high-frequency switchers, operating at 2.2MHz. The Voltmeter high switching frequency allows for reduced component values and sizes, including a single ceramic output Procedure capacitor on each rail. All channels have independent The EV kit is fully assembled and tested. Follow the steps undervoltage/overvoltage comparators at both input and below to verify board operation: output, current limiting, and fault-flag outputs. The EV kit 1) Connect a 5V power supply to VSUP (J1) and PGND ships fully assembled and tested, ready for immediate (J2). Activate the supply. evaluation of the IC. 2) Verify that PG1PG4 are at logic-low levels (J14, J34, Benefits and Features and J44). 3.0V to 5.5V Input Voltage Range 3) Populate jumpers (J13, J33, and J43) to activate all/ selected outputs. 1.0V to 4.0V Output Voltages Range Resistive Dividers Used to Set Appropriate Output 4) Measure the voltages on the enabled outputs. Voltage 5) Connect appropriate loads to all/selected outputs High Switching Frequency of 2.2MHz 6) Verify that the output voltages remain within Two Channels Operate 180 Out-of-Phase specification. Individual Enable and Reset Connections Available 7) Verify that PG1PG4 are at logic-high levels. Loop Measurements Ready on All Channels Overtemperature and Short-Circuit Protection Proven PCB Layout Ordering Information appears at end of data sheet. Fully Assembled and Tested 319-100116 Rev 0 12/17MAX20029B Evaluation Kit Evaluates: MAX20029B If the user wants to test a version of the chip with inter- Detailed Description of Hardware nally fixed output voltages, they can remove the appropri- EV Kit Interface ate resistors (R12, R32, R42), and replace the existing The large connectors, VSUP (J1) and PGND (J2), resistors (R11, R31, and R41) with 0 values to create a are the main input supply points. Connect a 5V power direct feedback connection from the VOUT nodes to the supply across these pins. Outputs OUTS1OUTS4 have OUTS pins. large connectors for the output and GND nodes (labeled An external square wave can be applied to the SYNC VOUT1VOUT4, respectively). Each channel has inde- pin (J3) to cause the IC to switch at a different frequency. pendent enable and power-good test points. Installing Maxim suggests using a 50% duty cycle for the square jumpers at the dual headers marked EN1EN4 activates wave. The supported switching frequency (f ) range is SW the respective channel the power-good signal for that from 1.7MHz up to 2.5MHz. channel can be accessed through the PG1PG4 pins. Three-pin headers J10, J30, and J40 are provided for Additional GND test points (J4J7) are provided for ease ease-of-loop measurements (for each of the regulators). of measurement. Evaluating IC Capabilities Ordering Information The IC installed on the board is a MAX20029BATIA/V+. It PART TYPE has its three outputs set through resistor-dividers on the MAX20029BEVKIT EV Kit board at V = 1.2V, V = 1.8V, and V = 3.3V, OUT1 OUT3 OUT4 with 3A current limit on V , and 1.5A current limit on Denotes RoHS compliant. OUT1 the remaining two. Maxim Integrated 2 www.maximintegrated.com