Evaluates: MAX17220MAX17225 MAX17222 Evaluation Kit General Description Quick Start The MAX17222 evaluation kit (EV kit) evaluates the Required Equipment MAX17220MAX17225 IC family of ultra-low quiescent MAX17222 EV kit current step-up DC-DC converters. The MAX17222 EV 1.8V to 5V, 3A DC power supply kit features two independent circuits to evaluate two Electronic load capable of 225mA different IC packages of the MAX17220MAX17225 Digital voltmeter (DVM) family. Both circuits on the EV kit operate over an input range of 400mV to 5.5V, depending on load, with 0.88V Procedure typical startup with 3k load. Each circuit provides The EV kit is fully assembled and tested. Follow the steps resistor-configurable output voltages from 1.8V to 5V in below to verify board operation. 100mV/step. Caution: Do not turn on power supply until all The EV kit comes with the MAX17222ELT+ and connections are completed. MAX17222ENT+ installed. Testing the 3V Output Circuit Features 1) Verify that jumper JU101 is in its default position, as shown in Table 2. Two Independent Circuits on One Board 2) Connect the power supply between the IN and nearest Evaluates the MAX17220MAX17225 IC Family in GND terminal posts. a 6-pin DFN 3) Connect the electronic load between the 3V output Evaluates the MAX17220MAX17225 IC Family in and nearest GND terminal posts. a 6-pin Wafer-Level Package (WLP) 4) Connect the DVM between the 3V output and nearest 400mV to 5.5V Input Range GND terminal posts. 1.8V to 5V Configurable Output Voltage in 5) Set the input power supply to 1.8V and turn on the 100mV/step power supply. 6) Set the electronic load to 225mA and enable the Up to 100mA/225mA/425mA Output Current electronic load. Proven 2-Layer 1oz Copper PCB Layout 7) Verify that the voltage at the 3V terminal post is Demonstrates Compact Solution Size approximately 3V. Fully Assemble and Tested Testing the 5V Output Circuit 1) Verify that jumper JU1 is in its default position, as shown in Table 1. MAX17222 EV Kit Files 2) Connect the power supply between the IN1 and FILE DESCRIPTION nearest GND1 terminal posts. MAX17222 EV BOM EV Kit Bill of Material 3) Connect the electronic load between the 5V output MAX17222 EV PCB Layout and nearest GND1 terminal posts. EV Kit Layout Diagrams 4) Connect the DVM between the 5V output and a nearest GND1 terminal posts. MAX17222 EV Schematic EV Kit Schematic 5) Set the input power supply to 3V, and turn on the MAX17222 EV Minimal Minimal Component Circuit power supply. Component Schematic 6) Set the electronic load to 225mA, and enable the electronic load. 7) Verify that the voltage at the 5V terminal post is Ordering Information appears at end of data sheet. approximately 5V. 19-8762 Rev 5 9/20Evaluates: MAX17220MAX17225 MAX17222 Evaluation Kit Spare Resistors and Inductors Detailed Description of Hardware The EV kit provides spare resistors and inductors on the The MAX17222 EV kit evaluates the MAX17220 PCBs bottom side. The spare resistors can be used to MAX17225 IC family of ultra-low quiescent current step- reconfigure the EV kit to a different output voltage (2V, up DC-DC converters. The MAX17222 EV kit features two 2.5V, 3V, or 3.3V). The spare inductors can be used to independent circuits to evaluate two different IC packages reconfigure the EV Kit output current ratings. of the MAX17220MAX17225 family. Both circuits on the EV kit operate over an input range of 400mV to 5.5V. Table 2. EN on MAX17222ELT+ (JU101) Each circuit provides resistor-configurable output voltages from 1.8V to 5V in 100mV/step. JU101 SHUNT DESCRIPTION The MAX17222 EV Kit comes with a MAX17222ELT+ POSITION (DFN) and a MAX17222ENT+ (WLP) installed. The MAX17222ELT+ circuit is configured for a 3V output, and 1-2* Enabled. EN = IN (through pullup resistor R102) can deliver 225mA with 1.8V input. The MAX17222ENT+ 2-3 Disabled. EN = GND circuit is configured for a 5V output, and can deliver Not Enabled. EN = high (through internal pullup 225mA with 3V input. Installed resistor) EN for the WLP Circuit *Default position. The WLP circuit on the EV kit provides a jumper (JU1) to enable or disable the MAX17222ENT+. Refer to Table 1 for Evaluating Other ICs JU1 jumper settings. The MAX17222 EV kit can also evaluate other ICs in the MAX17220MAX17225 IC family. To evaluate the other EN for the DFN Circuit ICs, replace U1 and/or U101 with the desired IC/IC pack- The DFN circuit on the EV kit provides a jumper (JU101) age. Refer to the MAX17220MAX17225 IC data sheet to enable/disable the MAX17222ELT+. Refer to Table 2 for additional information. for JU101 jumper settings. Battery Holders The MAX17222 EV kit provides battery holders for each Component Suppliers of the two circuits. The battery holder V1 can accommodate SUPPLIER WEBSITE a CR1632 Lithium Coin cell to power the WLP circuit, Coilcraft www.coilcraft.com while the V101 can hold an Energizer 364/363 silver oxide Murata/TOKO www.murata.com cell to power the DFN circuit. TDK www.tdk.com Table 1. EN on MAX17222ENT+ (JU1) Wurth Elektronik www.we-online.com JU1 Note: Indicate that you are using the MAX17220MAX17225 SHUNT DESCRIPTION when contacting these component suppliers. POSITION 1-2* Enabled. EN = IN1 (through pullup resistor R2) Ordering Information 2-3 Disabled. EN = GND1 PART TYPE Enabled. EN = high (through internal pullup Not Installed MAX17222EVKIT EV Kit resistor) Denotes RoHS *Default position. Maxim Integrated 2 www.maximintegrated.com