MAX15062B Evaluation Kit Evaluates: MAX15062B General Description The MAX15062B evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX15062B 60V, 300mA ultra-small, high-efficiency, synchronous step-down converter. The EV kit operates over a wide 6.5V to 60V input voltage range, and provides up to 300mA at the preset 5V output. The device features undervoltage lockout, overcurrent protection, and thermal shutdown. The EV kit switches at a fixed frequency of 500kHz, and delivers a peak efficiency of 92% with the supplied components. The EV kit comes installed with the MAX15062BATA+ in an 8-pin (2mm x 2mm) lead(Pb)-free/RoHS-compliant TDFN package. Features 6.5V to 60V Input Voltage Range 5V Output, 300mA Continuous Current Internal Compensation EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout 92% Peak Efficiency 500kHz Fixed-Frequency PWM Operation PFM or Forced-PWM Mode of Operation Hiccup Mode Overcurrent Protection Open-Drain RESET Output Thermal Shutdown Proven PCB Layout Fully Assembled and Tested Ordering Information appears at end of data sheet. Component List DESIGNATION QTY DESCRIPTION C1 1 22F, 100V electrolytic capacitor (8mm x 10.2mm) Panasonic EEEHA2A220UP C2 1 1F 10%, 100V X7R ceramic capacitor (1206) Murata GRM31CR72A105KA C3 1 1F 10%, 6.3V X7R ceramic capacitor (0603) Murata GRM188R70J105K C4 1 10F 10%, 6.3V X7R ceramic capacitor (1206) Murata GRM31CR70J106K JU1-JU3 3 DESIGNATION QTY L1 1 47H, 560mA inductor Coilcraft, Inc. LPS4018-473ML R1 1 3.32M 1% resistor (0402) R2 1 768k 1% resistor (0402) R3 1 100k 1% resistor (0402) U1 1 60V, 300mA, ultra-small, highefficiency, synchronous stepdown DC-DC converter (8 TDFN) Maxim MAX15062BATA+ -- 3 Shunts 1 PCB: MAX15062B EVALUATION KIT -- 2-pin headers DESCRIPTION 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 MAX15062B when contacting these component suppliers. 19-6638; Rev 0; 4/13 MAX15062B Evaluation Kit Evaluates: MAX15062B Quick Start Detailed Description Recommended Equipment MAX15062B EV kit 60V adjustable, 0.5A DC power supply Electronic load up to 300mA Voltmeter Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Verify that shunts are installed on jumpers JU1 and JU2 (EN/UVLO). 2) Verify that jumper JU3 (MODE PFM operation) is open. 3) Set the electronic load to constant-current mode, 300mA, and disable the electronic load. 4) Connect the electronic load's positive terminal to the VOUT PCB pad. Connect the negative terminal to the GND PCB pad. 5) Connect the voltmeter across the VOUT and GND PCB pads. 6) Set the power-supply output to 24V. Disable the power supply. 7) Connect the 24V power-supply output to the VIN PCB pad. Connect the supply ground to the GND PCB pad. 8) Turn on the power supply and verify that VOUT is at 5V with respect to GND. 9) Enable the electronic load and verify that VOUT is at 5V with respect to GND. The MAX15062B evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX15062B 60V, 300mA ultra-small, high-efficiency, synchronous step-down converter. The EV kit operates over a wide 6.5V to 60V input voltage range, and provides up to 300mA at the preset 5V output. The device features undervoltage lockout, overcurrent protection, and thermal shutdown. The EV kit switches at a fixed frequency of 500kHz, and delivers a peak efficiency of 92% with the supplied components. The EV kit includes an EN/UVLO PCB pad and jumpers JU1 and JU2 to enable control of the converter output. The MODE PCB pad and jumper JU3 are provided for selecting the mode of operation of the converter. The VCC PCB pad helps measure the internal LDO voltage. An additional RESET PCB pad is available for monitoring the open-drain logic output. Enable Control (JU1, JU2) The EN/UVLO pin of the device serves as an on/off control while also allowing the user to program the input undervoltage lockout (UVLO) threshold. Jumpers JU1 and JU2 configure the EV kit's output for turn-on/turn-off control. Install a shunt across pins 1-2 on jumper JU2 to disable VOUT. See Table 1 for proper jumper settings. Additionally, resistors R1 and R2 are included to set the UVLO to a desired turn-on voltage. Refer to the Enable Input (EN/UVLO), Soft-Start section in the MAX15062A/ MAX15062B IC data sheet for additional information on setting the UVLO threshold voltage. Table 1. Enable Control (EN/UVLO) SHUNT POSITION EN/UVLO PIN VOUT OUTPUT Connected to VIN Enabled 1-2 Connected to GND Disabled 1-2 Connected to midpoint of the R1, R2 resistor-divider Enabled at VIN 6.5V JU1 JU2 1-2 Open Open 1-2* *Default position. www.maximintegrated.com Maxim Integrated 2 MAX15062B Evaluation Kit Evaluates: MAX15062B Active-Low Open-Drain Reset Output (RESET) operation. Keep JU3 open to enable the light-load PFM operation. See Table 2 for proper JU3 configuration. The EV kit provides a PCB pad to monitor the status of the RESET output. RESET goes high when VOUT rises above 95% (typ) of its nominal regulated output voltage. When VOUT falls below 92% (typ) of its nominal regulated voltage, RESET is pulled low. Table 2. Mode Control (JU3) PFM or Forced-PWM Mode (MODE) SHUNT POSITION MODE PIN MODE OF OPERATION 1-2 Connected to GND Forced PWM Open* Unconnected PFM The EV kit includes a jumper (JU3) to program the mode of operation of the converter. Install a shunt across JU3 before powering up the EV kit to enable the forced-PWM *Default position. EV Kit Performance Report 80 70 VIN = 36V 60 50 VIN = 48V 60 VIN = 36V 50 40 VIN = 48V 30 10 PWM MODE 0 100 0 LOAD CURRENT (mA) VIN = 24V 5.06 5.04 VIN = 12V, 36V, 48V 5.02 100 150 200 250 300 4.98 PFM MODE 0 50 LOAD CURRENT (mA) 100 150 200 250 300 LOAD CURRENT (mA) LOAD TRANSIENT RESPONSE-- PFM MODE (LOAD CURRENT STEPPED FROM 5mA TO 150mA) MAX15062B EV toc04 MAX15062B EV toc05 5.002 OUTPUT VOLTAGE (V) 50 OUTPUT VOLTAGE vs. LOAD CURRENT 5.003 5.08 5.00 10 PFM MODE 1 70 VIN = 12V 20 40 30 VIN = 24V OUTPUT VOLTAGE vs. LOAD CURRENT MAX15062B EV toc03 80 90 5.10 OUTPUT VOLTAGE (V) VIN = 24V EFFICIENCY (%) EFFICIENCY (%) MAX15062B EV toc01 VIN = 12V 90 EFFICIENCY vs. LOAD CURRENT 100 MAX15062B EV toc02 EFFICIENCY vs. LOAD CURRENT 100 VOUT (AC) 100mV/div 5.001 VIN = 48V 5.000 4.999 VIN = 36V VIN = 24V 4.998 4.997 VIN = 12V PWM MODE 0 50 100 150 200 250 300 IOUT 100mA/div 100s/div LOAD CURRENT (mA) www.maximintegrated.com Maxim Integrated 3 MAX15062B Evaluation Kit Evaluates: MAX15062B EV Kit Performance Report (continued) LOAD TRANSIENT RESPONSE-- PFM OR PWM MODE (LOAD CURRENT STEPPED FROM 150mA TO 300mA) LOAD TRANSIENT RESPONSE-- PWM MODE (LOAD CURRENT STEPPED FROM NO LOAD TO 150mA) MAX15062B EV toc07 MAX15062B EV toc06 VOUT (AC) 100mV/div VOUT (AC) 100mV/div IOUT 100mA/div IOUT 100mA/div 20s/div 20s/div BODE PLOT MAX15062B EV toc08 50 EN/UVLO 5V/div 40 GAIN (dB) 72 10 36 0 0 -10 -36 -20 IOUT 100mA/div RESET 5V/div -50 -72 fCR = 47kHz, PHASE MARGIN = 60 -40 1ms/div 108 PHASE 20 -30 180 144 GAIN 30 VOUT 1V/div MAX15062B EV toc09 2 1 4 6 81 2 PHASE () SOFT-START -108 4 6 81 10 100 2 -144 -180 FREQUENCY (kHz) www.maximintegrated.com Maxim Integrated 4 MAX15062B Evaluation Kit VIN 6.5V TO 60V GND Evaluates: MAX15062B 1 C1 22F 100V C2 1F 100V R1 3.32M 1% 1 JU1 2 EN/UVLO VIN LX U1 MAX15062B 2 EN/UVLO GND 8 7 L1 47H 5V, 300mA C4 10F 6.3V VOUT GND VOUT 4 1 JU2 2 VCC R2 768k 1% VCC MODE R3 100k VCC 1% C3 1F 3 V CC RESET 6 RESET MODE 5 1 JU3 2 Figure 1. MAX15062B EV Kit Schematic www.maximintegrated.com Maxim Integrated 5 MAX15062B Evaluation Kit Evaluates: MAX15062B 1.0" Figure 2. MAX15062B EV Kit Component Placement Guide-- Component Side 1.0" Figure 3. MAX15062B EV Kit PCB Layout--Component Side 1.0" Figure 4. MAX15062B EV Kit PCB Layout--Solder Side www.maximintegrated.com Maxim Integrated 6 MAX15062B Evaluation Kit Evaluates: MAX15062B Ordering Information PART TYPE MAX15062BEVKIT# EVKIT #Denotes RoHS compliant. www.maximintegrated.com Maxim Integrated 7 MAX15062B Evaluation Kit Evaluates: MAX15062B Revision History REVISION NUMBER REVISION DATE 0 4/13 DESCRIPTION Initial release PAGES CHANGED -- For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. 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