19-5771 Rev 1 1/12 MAX16952 Evaluation Kit Evaluates: MAX16952 General Description Features The MAX16952 evaluation kit (EV kit) is a fully assem- S 6V to 36V Input Range bled and tested PCB that contains all the components S 5V at Up to 5A Output necessary to evaluate the performance of the MAX16952 S 2.2MHz Switching Frequency synchronous PWM step-down controller. The device is S Selectable Forced Fixed-Frequency PWM Mode, available in a 16-pin TSSOP package and features an SKIP Mode, or External Synchronization exposed pad for enhanced thermal dissipation. The EV kit requires a 6V to 36V power supply for normal S Power-Good LED Indicator operation. The EV kit output is configured to 5V and can S Enable Input deliver up to 5A output current. The EV kit can be easily S Cycle-by-Cycle Current Limit and Thermal reconfigured to operate the controller in continuous PWM Protection mode, SKIP mode, or external synchronization operation. S Proven PCB Layout The controller switching frequency is set to 2.2MHz. The EV kit includes a jumper to enable the circuit and an LED S Fully Assembled and Tested to monitor the power-good output. Ordering Information appears at end of data sheet. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION Not installed, Schottky diode BIAS, EN, FSYNC, D3 0 (3 SOT23) OUT (x2), 7 Red multipurpose test points SUP (x2) JU1 1 3-pin header JU2 1 2-pin header 0.1FF Q10%, 50V X7R ceramic C1, C4 2 capacitors (0603) 1.5FH, 18A inductor L1 1 Murata GRM188R71H104K Wrth 7443330150 47FF Q20%, 50V electrolytic 40V, 7.6A n-channel MOSFETs C2 1 capacitor (D8) N1, N2 2 (8 SO) Panasonic EEE-FK1H470XP Fairchild FDS8449 PGND (x5), SGND 6 Black multipurpose test points Not installed, ceramic C5, C9 0 capacitors (0603) R2, R5, R6 0 Not installed, resistors (0603) 47FF Q20%, 6.3V X7R ceramic 0.015I Q1%, 1/2W resistor C6, C7 2 capacitors (1210) R4 1 (1206) Murata GRM32ER70J476M IRC LRF1206LF-01-R015-F R7, R12 2 0I Q5% resistors (0603) 2.2FF Q10%, 10V X7R ceramic C8 1 capacitor (0603) R8 1 13.0kI Q1% resistor (0603) Murata GRM188R71A225K R9 1 30kI Q5% resistor (0603) R10 1 10kI Q5% resistor (0603) 3300pF Q10%, 50V X7R C10 1 ceramic capacitor (0603) R11 1 51.1kI Q1% resistor (0603) Murata GRM188R71H332K Synchronous buck converter U1 1 (16 TSSOP-EP) 4.7FF Q10%, 50V X7R ceramic Maxim MAX16952AUE/V+ C11, C13 2 capacitors (1206) Murata GRM31CR71H475K 2 Shunts PCB: MAX16952 EVALUATION 60V, 3A Schottky diode (SMB) D1 1 1 KIT Diodes Inc. B360B-13-F D2 1 Red LED (0603) For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.MAX16952 Evaluation Kit Evaluates: MAX16952 Component Suppliers SUPPLIER PHONE WEBSITE Diodes Incorporated 805-446-4800 www.diodes.com Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com IRC, Inc. 361-992-7900 www.irctt.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Panasonic Corp. 800-344-2112 www.panasonic.com Wrth Electronik GmbH & Co. KG 201-785-8800 www.we-online.com Note: Indicate that you are using the MAX16952 when contacting these component suppliers. Quick Start Detailed Description of Hardware The MAX16952 EV kit is a fully assembled and tested Required Equipment PCB that contains all the components necessary to MAX16952 EV kit evaluate the performance of the MAX16952 synchronous 12V, 1A power supply PWM step-down controller. The device is available in a An electronic load capable of sinking 1A (e.g., 16-pin TSSOP package and features an exposed pad for HP6060B) thermal dissipation. The device has a 3.5V to 36V input voltage range. The EV kit circuit is designed to operate Two digital voltmeters (DVMs) from a single 6V to 36V DC power supply. Procedure The EV kit is configured to output 5V and provides up to The EV kit is fully assembled and tested. Follow the steps 5A load current at the OUT and PGND test points. The below to verify board operation: switching frequency is set to 2.2MHz using resistor R8. 1) Verify that a shunt is installed across pins 2-3 on The peak inductor current is set to 5.3A using resistor jumper JU1. R4. The EV kit can be configured to operate in forced fixed-frequency PWM mode, low-quiescent current SKIP 2) Verify that a shunt is not installed across jumper JU2 (output enabled). mode, or external synchronization using jumper JU1. The EV kit features test points to evaluate the enable (EN) 3) Connect the load across the OUT and PGND test feature and to monitor the BIAS output voltage. A points. red LED (D2) is available to monitor the power-good 4) Connect the first DVM across the SUP and PGND test (PGOOD) output signal. points. Modes of Operation (JU1) 5) Connect the second DVM across the OUT and PGND Jumper JU1 configures the EV kit for external synchro- test points. nization, forced fixed-frequency PWM, or SKIP mode 6) Connect the power supplys positive and ground ter- operation. Install a shunt across pins 1-2 on JU1 to minals to the SUP and PGND test points, respectively. operate the EV kit in forced fixed-frequency PWM mode. Place a shunt across pins 2-3 on JU1 to operate in SKIP 7) Turn on the power supply and set to 12V with a 1A current limit. mode. Remove the shunt on JU1 when synchronizing, using an external digital clock signal at the FSYNC and 8) Enable the 1A electronic load. SGND test points. Refer to the Forced Fixed-Frequency 9) Verify that the red LED (D2) is off and the DVM at OUT PWM Mode and Light-Load Low-Quiescent Operating measures 5V. (SKIP) Mode sections in the MAX16952 IC data sheet for additional information. See Table 1 for JU1 configuration. Maxim Integrated 2