MAX17501A/MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages General Description Features The MAX17501A/MAX17501E evaluation kits (EV kits) S Operates from a 4.5V to 60V Input Supply provide proven designs to evaluate the MAX17501A/ S 3.3V Fixed Output Voltage MAX17501E high-efficiency, high-voltage, synchronous S 500mA Output Current step-down DC-DC converters. The EV kits use these devices to generate a fixed 3.3V, at load currents S 600kHz Switching Frequency up to 500mA, from a 4.5V to 60V input supply. The S Enable/UVLO Input MAX17501A supports a PFM control scheme with high S Resistor-Programmable UVLO Threshold light-load efficiency, while the MAX17501E features a S Open-Drain RESET Output forced-PWM control scheme that provides constant switching-frequency operation at all load and line condi- S Overcurrent and Overtemperature Protection tions. S PFM/PWM (MAX17501A EV Kit) S PWM (MAX17501E EV Kit) S Proven PCB Layout Ordering Information appears at end of data sheet. S Fully Assembled and Tested Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION JU1 1 3-pin header 1FF Q10%, 100V X7R ceramic C1 1 capacitor (1206) 33FH, 1.4A inductor Murata GRM31CR72A105KA01L L1 1 (6mm x 6mm x 3.5mm) Coilcraft LPS6235-333ML 1FF Q10%, 6.3V X7R ceramic C2 1 capacitor (0603) R1 1 3.32MI Q1% resistor (0402) Murata GRM188R70J105K R2 1 866kI Q1% resistor (0402) R4 1 100I resistor (0402) 3300pF Q10%, 50V X7R ceramic C3 1 capacitor (0402) R6 1 10kI Q1% resistor (0402) Murata GRM155R71H332K TP1, TP2 0 Not installed, test points See the EV Kit-Specific 10FF Q10%, 10V X7R ceramic U1 1 Component List C4 1 capacitor (1206) Murata GRM31CR71A106K 1 Shunt PCB: See the EV Kit-Specific 33FF, 80V aluminum 1 Component List C7 1 electrolytic (D = 8mm) Panasonic EEEFK1K330P For pricing, delivery, and ordering information, please contact Maxim Direct at 19-6435 Rev 1 10/13 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.MAX17501A/MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages EV Kit-Specific Component List EV KIT DESIGNATION DESCRIPTION Buck converter (10 TDFN-EP*) U1 Maxim MAX17501AATB+ MAX17501ATEVKIT PCB: MAX17501AT EVALUATION KIT Buck converter (10 TDFN-EP*) U1 Maxim MAX17501EATB+ MAX17501ETEVKIT PCB: MAX17501ET EVALUATION KIT *EP = Exposed pad. Component Suppliers SUPPLIER PHONE WEBSITE Coilcraft, Inc. 847-639-6400 www.coilcraft.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Panasonic Corp. 800-344-2112 www.panasonic.com Note: Indicate that you are using the MAX17501 when contacting these component suppliers. To turn on/turn off the part from EN/UVLO, follow the Quick Start steps below: Recommended Equipment 1) Remove resistors R1 and R2 and the jumper installed MAX17501A or MAX17501E EV kit across pins 1-2 on jumper JU1. 4.5V to 60V, 1A DC input power supply 2) Connect the power supply to the EV kit and turn on the power supply. Set the power supply at a voltage Load capable of sinking 500mA between 4.5V and 60V. Digital voltmeter (DVM) 3) Connect the function generator output to the Function generator EN/UVLO test loop. Procedure 4) EN/UVLO rising threshold is 1.24V and falling thresh- The EV kits are fully assembled and tested. Follow the steps old is 1.11V. Make sure that the voltage-high and below to verify board operation. Caution: Do not turn on voltage-low levels of the function generator output are power supply until all connections are completed. greater than 1.24V and less than 1.11V, respectively. 1) Set the power supply at a voltage between 4.5V and 5) When powering down the EV kits, first disconnect the 60V. Disable the power supply. function generator output from the EN/UVLO test loop and then turn off the DC power supply. 2) Connect the positive terminal of the power supply to the VIN PCB pad and the negative terminal to the Care should be taken in board layout and systems wiring nearest PGND PCB pad. Connect the positive termi- to prevent violation of the absolute maximum rating of the nal of the 500mA load to the VOUT PCB pad and the FB/VO pin under short-circuit conditions. Under such con- negative terminal to the nearest PGND PCB pad. ditions, it is possible for the ceramic output capacitor to oscillate with the board or wiring inductance between the 3) Connect the DVM across the VOUT PCB pad and the capacitor and short-circuited load, and thereby cause the nearest PGND PCB pad. absolute maximum rating of FB/VO (-0.3V) to be exceed- 4) Verify that a shunt is installed across pins 1-2 on ed. This parasitic board or wiring inductance should be jumper JU1. minimized and the output voltage waveform under short- 5) Turn on the DC power supply. circuit operation should be verified to ensure that the absolute maximum rating of FB/VO is not exceeded. 6) Enable the load. 7) Verify that the DVM displays the expected voltage. 2