Evaluates: MAX16922 19-5157 Rev 0 2/10 MAX16922 Evaluation Kit General Description Features The MAX16922 evaluation kit (EV kit) is an assembled S 6V to 18V Input Supply Voltage Range and tested circuit board that contains all the components S Load-Dump Protection Circuit Withstands Input necessary to evaluate the MAX16922 IC family. The Transients Up to 45V MAX16922 is a dual-output, step-down DC-DC converter S 5V at 1.2A Output (OUT1 from DC-DC1) and dual low dropout (LDO) linear regulator. The EV kit is powered from a DC supply providing 6V to 18V and up S 3.3V at 600mA Output (OUT2 from DC-DC2) to 3A. The EV kit is designed to withstand a load-dump S 2.5V at 300mA Output (OUT3 from LDO1) condition up to 45V. S 1.8V at 300mA Output (OUT4 from LDO2) The EV kit is shipped with the MAX16922ATPE/V+ S 180N Out-of-Phase Operation Reduces Input installed. This MAX16922 version is capable of deliver- Capacitance ing 5V at 1.2A from the first step-down DC-DC converter S 2.2MHz Switching Frequency (DC-DC1) and 3.3V at up to 600mA from the second step-down DC-DC converter (DC-DC2). The first LDO S Forced-PWM and Skip Mode Operation linear regulator (LDO1) provides 2.5V and up to 300mA, S Enable Input (EN) while the second LDO linear regulator (LDO2) pro- S Power-Good Reset Output (RESET) vides 1.8V and up to 300mA. The MAX16922 switching frequency is 2.2MHz and the two DC-DC converters S Evaluates the MAX16922 Family in a 20-Pin TQFN switch 180N out of phase with respect to each other. The (5mm x 5mm x 0.8mm) Package DC-DC2 can operate in PWM mode to prevent AM band S Fully Assembled and Tested interference or high-efficiency skip mode. The EV kit includes an enable input (EN) and a power-good reset output (RESET) to monitor the output voltages of the two Ordering Information DC-DC converters. PART TYPE MAX16922EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 0.1uF Q10%, 16V X7R ceramic 47FF Q20%, 50V aluminum C11 1 capacitor (0402) electrolytic capacitor C1 1 Murata GRM155R71C104K (Size E or 8mm x 6.2mm) Panasonic EEE-FK1H470P 10FF Q10%, 10V X7R ceramic C12, C13 2 capacitors (1206) 0.047FF Q10%, 50V X7R ceramic Murata GRM31CR71A106K C2, C3 2 capacitors (0603) Murata GRM188R71H473K 40V, 1.1A Schottky diode (PowerDI-123) 1FF Q10%, 10V X7R ceramic D1 1 Diodes Inc. DFLS140 C4 1 capacitor (0603) (Top Mark: F04) Murata GRM188R71A105K 4.7FF Q10%, 25V X7R ceramic 200V, 1A diode (SMA) C5C10 6 capacitors (1206) D2 1 Diodes Inc. ES1D Murata GRM31CR71E475K (Top Mark: ES1D) JU1, JU2 2 2-pin headers Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX16922 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION JU3, JU4 2 3-pin headers R2, R3 2 20kI Q5% resistors (0402) 4.7FH, 2.0A inductor Dual step-down converter L1 1 TDK LTF5022-4R7N2R0 U1 1 (20 TQFN-EP*) Maxim MAX16922ATPE/ V+ 2.2FH, 1.32A inductor L2 1 Coilcraft EPL2014-222MLB 4 Shunts Uninsulated panel-mount PCB: MAX16922 EVALUATION PGND, VBAT 2 1 banana jacks KIT+ R1 1 100kI Q5% resistor (0402) *EP = Exposed pad. /V denotes an automotive qualified part. Component Suppliers SUPPLIER PHONE WEBSITE Coilcraft, Inc. 847-639-6400 www.coilcraft.com Diodes Incorporated 805-446-4800 www.diodes.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Panasonic Corp. 800-344-2112 www.panasonic.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX16922 when contacting these component suppliers. 3) Verify that a shunt is installed on pins 1-2 of jumper Quick Start JU3 (LDO1 powered from OUT1). Required Equipment 4) Verify that a shunt is installed on pins 2-3 of jumper Adjustable 6V to 18V, 3A DC power supply JU4 (LDO2 powered from OUT2). Up to four electronic (e.g., HP6060B) or passive 5) Connect the electronic or passive loads to the loads desired outputs. Voltmeter 6) Connect a 6V to 18V DC power supply to the VBAT and PGND binding posts set the voltage to 12V. Procedure The MAX16922 EV kit is fully assembled and test- 7) Turn on the power supply. ed. Follow the steps below to verify board operation. 8) Enable the electronic loads. Caution: Do not turn on the power supply until all 9) Verify that OUT1 is 5V, OUT2 is 3.3V, OUT3 is 2.5V, connections are completed. and OUT4 is 1.8V. 1) Verify that a shunt is installed on jumper JU1 (EV kit enabled). 2) Verify that a shunt is installed on jumper JU2 (DC- DC2 on forced-PWM mode). 2 Evaluates: MAX16922