MAX17270EVKIT# Analog Devices

Evaluates: MAX17270 MAX17270 Evaluation Kit General Description Quick Start The MAX17270 evaluation kit (EV kit) evaluates the Required Equipment MAX17270. The MAX17270 is a 3-output switching MAX17270 EV kit regulator that regulates three outputs using a single, small 2.7V to 5.5V, 1A DC power supply 2.2H inductor. Electronic load capable of 100mA The MAX17270 EV kit features two independent circuits to evaluate two different IC packages of the MAX17270. Digital voltmeter (DVM) Both circuits on the EV kit operates over an input range Procedure of 2.7V to 5.5V. Each circuit provides three jumper- <<Testing the TQFN Circuit>> configurable outputs, with voltages from 0.8V to 5V for The EV kit is fully assembled and tested. Follow the steps each output channel. Each circuit output on the EV kit below to verify board operation. delivers up to 50mA/75mA/80mA of current depending on the input voltage to the output voltage ratio. Caution: Do not turn on power supply until all connections are completed. The EV kit comes with the MAX17270ETE+ and the MAX17270ENE+ installed. 1) Verify that jumpers JU1 to JU6 are in their default positions, as shown in Table 1 through Table 4. Features 2) Connect the 2.7V to 5.5V power supply between the Two Independent Circuits on One Board IN1 and nearest PGND1 terminal posts. Evaluates the MAX17270 IC in a 16-pin TQFN 3) Turn on the power supply and set the power supply Evaluates the MAX17270 IC in a 4 x 4 Bump, output to 3V. 0.4mm Pitch WLP 4) Verify that the output voltage at OUT1 and nearest 2.7V to 5.5V Input Range PGND1 terminal posts is 1.0V. 0.8V to 5V Configurable Output Voltage 5) Verify that the output voltage at OUT2 and nearest Up to 50mA/75mA/80mA Output Current PGND1 terminal posts is 1.8V. Proven 4-Layer 1oz Copper PCB Layout 6) Verify that the output voltage at OUT3 and nearest PGND1 terminal posts is 3.3V. Demonstrates Compact Solution Size 7) Connect the electronic load between OUT1 and Fully Assemble and Tested PGND1. Set the electronic load to 50mA 8) Enable the electronic load and verify that OUT1 is Ordering Information appears at end of data sheet. still 1.0V 9) Connect the electronic load between OUT2 and MAX17270 EV Kit Files PGND1. Set the electronic load to 75mA FILE DECRIPTION 10) Enable the electronic load and verify that OUT2 is still 1.8V MAX17270 EV BOM EV Kit Bill of Materials 11) Connect the electronic load between OUT3 and MAX17270 EV PCB Layout EV Kit Layout PGND1. Set the electronic load to 80mA MAX17270 EV Schematic EV Kit Schematic 12) Enable the electronic load and verify that OUT3 is still 3.3V 319-100152 Rev 0 2/18Evaluates: MAX17270 MAX17270 Evaluation Kit 21) Connect the electronic load between OUT102 and Procedure PGND. Set the electronic load to 75mA. <<Testing the WLP Circuit>> The EV kit is fully assembled and tested. Follow the steps 22) Enable the electronic load and verify that OUT102 is below to verify board operation. still 1.8V. Caution: Do not turn on power supply until all con- 23) Connect the electronic load between OUT103 and nections are completed. PGND. Set the electronic load to 80mA. 13) Verify that jumpers JU101 to JU106 are in their 24) Enable the electronic load and verify that OUT103 is default positions, as shown in Table 5 through Table 8. still 3.3V. 14) Connect the 2.7V to 5.5V power supply between the Detailed Description of Hardware IN and nearest PGND terminal posts. The MAX17270 EV kit evaluates the MAX17270. The 15) Turn on the power supply and set the power supply MAX17270 is a 3-output switching regulator that regulates output to 3V. three outputs using a single, small 2.2H inductor. 16) Verify that the output voltage at OUT101 and nearest The MAX17270 EV kit features two independent circuits PGND terminal posts is 1.0V. to evaluate two different IC packages of the MAX17270, 17) Verify that the output voltage at OUT102 and nearest the 16-pin TQFN and the 4x4 bump, 0.4mm pitch, WLP. PGND terminal posts is 1.8V. Both circuits on the EV kit operates over an input voltage range of 2.7V to 5.5V. Each circuit provides three output 18) Verify that the output voltage at OUT103 and nearest channels. Each output channel provides an output with a PGND terminal posts is 3.3V. jumper-configurable voltage from 0.8V to 5V. Each circuit 19) Connect the electronic load between OUT101 and output channel delivers up to 50mA/75mA/80mA of current PGND. Set the electronic load to 50mA. depending on the input voltage to the output voltage ratio. 20) Enable the electronic load and verify that OUT101 is The EV kit comes with the MAX17270ETE+ and the still 1.0V. MAX17270ENE+ installed. Table 1. EN1EN3 (JU1 JU3) on MAX17270 (TQFN) Circuit JU1 - JU3 SHUNT POSITION DESCRIPTION 12* Enabled. EN = IN1 23 Disabled. EN = PGND1 OPEN Enabled. EN = high (through internal pullup) *Default position. Table 2. RSEL1 (JU4) on MAX17270 (TQFN) Circuit JU4 SHUNT POSITION RSEL1 CONNECTED TO OUT1 OUT1 CURRENT LIMIT 12 R4 = 1M 0.8V 0.5A 13* R5 = 768k 1.0V 0.5A 14 R6 = 536k 1.2V 0.5A *Default position. Maxim Integrated 2 www.maximintegrated.com