MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package General Description Features The MAX17501H EV kit provides a proven design to S Operates from a 4.5V to 60V Input Supply evaluate the MAX17501H high-efficiency, high-voltage, S 2.5V Output Voltage synchronous step-down DC-DC converter in a TDFN S 500mA Output Current package. The EV kit uses the MAX17501H device to S 300kHz Switching Frequency generate 2.5V at load currents up to 500mA from a 4.5V to 60V input supply. The MAX17501H features a forced- S Enable/UVLO Input PWM control scheme that provides constant switching- S Resistor-Programmable UVLO Threshold frequency operation at all load and line conditions. S Open-Drain RESET Output S Overcurrent and Overtemperature Protection S Proven PCB Layout S Fully Assembled and Tested Ordering Information appears at end of data sheet. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 2.2FF Q10%, 100V X7R 47pF Q10%, 50V C0G C1 1 ceramic capacitor (1210) C9 1 ceramic capacitor (0402) Murata GRM32ER72A225K Murata GRM1555C1H470J JU1 1 3-pin header 1FF Q10%, 6.3V X7R ceramic C2 1 capacitor (0603) 47FH, 1.2A inductor Murata GRM188R70J105K L1 1 (6mm x 6mm x 3.5mm) Coilcraft LPS6235-473ML 6800pF Q10%, 25V X7R C3 1 ceramic capacitor (0402) R1 1 3.32MI Q1% resistor (0402) Murata GRM155R71E682K R2 1 1MI Q1% resistor (0402) R3 1 20kI Q1% resistor (0402) 22FF Q10%, 10V X7R C4 1 R4 1 69.8kI Q1% resistor (0402) ceramic capacitor (1210) Murata GRM32ER71A226K R5 1 39.2kI Q1% resistor (0402) R6 1 10kI Q1% resistor (0402) 2200pF Q10%, 50V X7R C5 1 ceramic capacitor (0402) TP1, TP2 0 Not installed, test points Murata GRM155R71H222K Buck converter U1 1 (10 TDFN-EP*) 33FF 80V aluminum Maxim MAX17501HATB+ C7 1 electrolytic (D = 8mm) Panasonic EEEFK1K330P 1 Shunt PCB: MAX17501HT 1 EVALUATION KIT *EP = Exposed pad. For pricing, delivery, and ordering information, please contact Maxim Direct at 19-6424 Rev 0 10/12 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package 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: 1) Remove resistors R1 and R2 and the jumper con- Recommended Equipment nected across pins 1-2 on jumper JU1. MAX17501H EV kit 2) Connect the power supply to the EV kit and turn on 4.5V to 60V, 1A DC input power supply 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 EN/ Function generator UVLO test loop. Procedure 4) EN/UVLO rising threshold is 1.24V and falling thresh- The EV kit is fully assembled and tested. Follow the old is 1.11V. Make sure that the voltage-high and steps below to verify the board operation. Caution: Do voltage-low levels of the function generator output are not turn on power supply until all connections are greater than 1.24V and less than 1.11V, respectively. completed. 5) While powering down the EV kits, first disconnect the 1) Set the power supply at a voltage between 4.5V and function generator output from the EN/UVLO test loop 60V. Disable the power supply. and then turn off the DC power supply. 2) Connect the positive terminal of the power supply Detailed Description of Hardware to the VIN PCB pad and the negative terminal to the nearest PGND PCB pad. Connect the positive termi- The MMAX17501H EV kit provides a proven design to nal of the 500mA load to the VOUT PCB pad and the evaluate the MAX17501H high-efficiency, high-voltage, negative terminal to the nearest PGND PCB pad. synchronous step-down DC-DC converter in a TDFN 3) Connect the DVM across the VOUT PCB pad and the package. The EV kit generates 2.5V at load currents nearest PGND PCB pad. up to 500mA from a 4.5V to 60V input supply. The EV kit features a 300kHz fixed switching frequency for 4) Verify that a shunt is installed across pins 1-2 on optimum efficiency and component size. The EV kit fea- jumper JU1. tures a forced-PWM control scheme that provides con- 5) Turn on the DC power supply. stant switching frequency operation at all load and line 6) Enable the load. conditions. 7) Verify that the DVM displays the expected voltage. Maxim Integrated 2