Click here for production status of specific part numbers. Evaluates: MAXM15063 5V MAXM15063 5V Output Output-Voltage Application Evaluation Kit General Description Quick Start The MAXM15063 5V output evaluation kit (EV kit) pro- Recommended Equipment vides a proven design to evaluate the MAXM15063 One 4.5V to 60V DC, 300mA power supply high-voltage, high-efficiency, synchronous step-down 1.5W resistive load with 300mA sink capacity DC-DC module. The EV kit is programmed to deliver 5V output for loads up to 300mA. The EV kit features an Four digital multimeters (DMM) adjustable input undervoltage lockout, selectable mode, MAXM15063EVKIT and open-drain RESET signal. The MAXM15063 data sheet provides a complete description of the module Equipment Setup and Test Procedure that should be read in conjunction with this EV kit data The EV kit is fully assembled and tested. Follow the steps sheet prior to modifying the demo circuit. For full module below to verify the board operation. features, benefits and parameters, refer to the MAXM15063 Caution: Do not turn on power supply until all data sheet. connections are completed. 1) Set the power supply at a voltage between 4.5V and Features 60V. Then, disable the power supply. Highly Integrated Solution 2) Connect the positive terminal of the power supply to Wide 12V to 60V Input Range the VIN PCB pad and the negative terminal to the Fixed 5V Output, Delivers Up To 300mA nearest GND PCB pad. Connect the positive termi- Output Current nal of the 300mA load to the VOUT PCB pad and the High 81.72% Efficiency negative terminal to the nearest GND PCB pad. (V = 24V, V = 5V at 220mA) IN OUT 3) Connect the DVM (DMM in voltage-measurement 500kHz Switching Frequency mode) across the VOUT PCB pad and the nearest GND PCB pad. ENABLE/UVLO Input, Resistor-Programmable UVLO Threshold 4) Verify that shunt is not installed on jumper J1 (see Table 1 for details). PFM Feature for Better Light-Load Efficiency 5) Turn on the DC power supply. Fixed Internal 4.1ms Soft-Start Time 6) Enable the load. RESET Output, with Pullup Resistor to V CC 7) Verify that the DVM displays 5V. Overcurrent and Overtemperature Protection (OCP and OTP) Low-Profile, Surface-Mount Components Proven PCB Layout Ordering Information appears at end of data sheet. Fully Assembled and Tested Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions 319-100324 Rev 0 3/19Evaluates: MAXM15063 5V MAXM15063 5V Output Evaluation Kit Output-Voltage Application Electromagnetic Interference (EMI) Detailed Description Compliance to conducted emissions (CE) standards The MAXM15063 EV kit is designed to demonstrate requires an EMI filter at the input of a switching power salient features of MAXM15063 power module. The EV kit converter. The EMI filter attenuates high-frequency includes an EN/UVLO PCB pad, and jumper J1, to enable currents drawn by the switching power converter, and the output at a desired input voltage. Jumper J2 allows limits the noise injected back into the input power source. selection of either PWM or PFM mode of operation based on light-load performance requirements. An additional Use EMI filter components as shown in Figure 1 in RESET pad is available for monitoring if the converter conjunction with the schematic results in lower con- output voltage is in regulation. ducted emissions below CISPR22 Class B limits. The MAXM15063 EV kit PCB layout is also designed to limit Output Capacitor Selection radiated emissions from switching nodes of the power X7R ceramic output capacitors are preferred due to their converter, resulting in radiated emissions below CISPR22 stability over temperature in industrial applications. The Class B limits. required output capacitor (C5) for 5V output is selected from Table 1 of the MAXM15063 data sheet as 10F/6.3V. Table 1. UVLO Enable/Disable Fixed Output Voltage The MAXM15063 is a fixed 5V output module. Connect Configuration (J1) FB of MAXM15063 directly to VOUT for feedback control. MAXM15063 POSITION EN/UVLO PIN Enable/Undervoltage-Lockout (EN/UVLO) OUTPUT Programming Connected to the Programmed to startup The MAXM15063 offers an adjustable input undervoltage- Not center node of at desired input-voltage lockout feature. In this EV kit, for normal operation, leave Installed* resistor-divider R1 level. jumper J1 open. When J1 is left open, the MAXM15063 and R2. is enabled when the input voltage rises above 12V. To Enabled if V is greater IN disable MAXM15063, install a jumper across pins 2-3 on 1-2 Connected to V IN than V IN(MIN). J1. See Table 1 for J1 settings. A potential divider formed 2-3 Connected to GND Disabled by R1 and R2 sets the input voltage (V ) at which the INU module is enabled. The value of resistor R1 is chosen *Default position to be 2.2M, and R2 is calculated using the following equation: R 1.215 1 R = 2 VIN EMI VIN ( V 1.215 ) INU L 1 VIN EMI where R1 and R2 are in k, 82H For MAXM15063 to turn on at 12V input, the Resistor R2 C C 9 C 8 7 is calculated to be 249k. 0.68F 1F 0.1F Input Capacitor Selection The input capacitor serves to reduce the current peaks drawn from the input power supply and reduces switching frequency ripple at the input. The input capacitance must Figure 1. EMI Filter Components be greater than or equal to the value given in Table 1 of MAXM15063 data sheet. Input capacitor C3 is chosen to be 1F/100V. Maxim Integrated 2 www.maximintegrated.com