Click here for production status of specific part numbers. Evaluate: MAX20075/MAX20075D/ MAX20075/MAX20076 MAX20076/MAX20076D/MAX20076E/ Evaluation Kits MAX25276/MAX25276D Procedure General Description The EV kit is fully assembled and tested, follow the steps The MAX20075 and MAX20076 evaluation kits (EV kit) below to activate the board. Caution: Do not turn on the provide a proven design to evaluate the MAX20075/ power supply until all connections are completed. MAX20076/MAX25276 2.1MHz high-voltage mini-buck converters in a 12-pin TDFN package. All components are 1) Verify that all jumpers are in their default positions, as rated for the automotive temperature range. Various test shown in Table 1. points and jumpers are included for evaluation. 2) Connect the positive and negative terminals of the power supply to the SUP and GND test pads, The EV kit comes with a MAX2007 DATCA/V+ installed, respectively. but can also be used to evaluate all other MAX20075/ 3) Connect the positive terminal of the voltmeter to OUT, MAX20076/MAX25276 variants with minimal U1 compo- and the negative terminal to GND2. nent changes. 4) Set the power supply to 14V and 2A current limit. Turn on the power supply. Benefits and Features 5) With the PU and LED jumpers shorted, the green 3.5V to 36V Input Supply Range LED should light up. The voltmeter should display 5V or 3.3V Fixed Output Voltage, or Adjustable an output voltage of 5V. Between 1V and 10V Additional Evaluation Delivers Up to 0.6A/1.2A Output Current 6) Connect the positive and negative terminals of an Frequency-Synchronization Input electronic load to OUT and GND, respectively. Enable Input 7) Set the electronic load to 100mA or use an equivalent Voltage-Monitoring PGOOD Output resistive load. The resistive load is calculated based on 5V output and should be approximately 50. If Proven PCB Layout using a resistor load, make sure it can handle 0.5W. Fully Assembled and Tested 8) Turn on the power supply and electronic load. Verify that OUT is 5V. Quick Start Required Equipment MAX20075 or MAX20076 EV kit Table 1. Default Jumper Settings 3.5V to 36V, 2A power supply SHUNT Voltmeter JUMPER FUNCTION POSITION Electronic load EN Middle-ON Buck controller enabled SPS Middle-OFF Spread spectrum disabled PGOOD pulls up to V BIAS PU, LED Installed when OUT is in regulation SYNC Middle-FPWM Forced-PWM mode Ordering Information appears at end of data sheet. 19-8754 Rev 3 2/20Evaluate: MAX20075/MAX20075D/ MAX20075/MAX20076 Evaluation Kits MAX20076/MAX20076D/MAX20076E/ MAX25276/MAX25276D Evaluating the Other Variants Detailed Description The devices are available in fixed 5V, 3.3V, and 5.147V out- The MAX20075 and MAX20076 EV kits provide a puts. The EV kits come installed with the 5V output version. proven layout for the MAX20075/MAX20075D/MAX20076/ The other parts can be swapped with the 5V part without MAX20076D/MAX20076E/MAX25276/MAX25276D changing other components. 2.1MHz synchronous buck regulator. The device accepts input voltages as high as 36V and delivers up to 0.6A and Setting the Output Voltage in 1.2A. The EV kits can handle an input-supply transient Buck Converters up to 42V. Various test points are included for evaluation. To externally adjust the output voltage (OUT) between 3V Switching Frequency/ and 10V, remove R1 and install a 0 resistor on R4. Place External Synchronization appropriate resistors in positions R5 and R6 according to the following equation: The devices can operate in two modes: forced-PWM or skip. Skip mode has better efficiency for light-load V OUT conditions. When SYNC is pulled low, the device operates R5 R6 1 V in skip mode for light loads and in PWM mode for larger FB loads. When SYNC is pulled high, the device is forced to where V = 1V (typ). FB operate in PWM across all load conditions. Use an external resistor-divider with the MAX2007 ATCC SYNC can be used to synchronize with other supplies if a for output voltages between 1V and 3V. clock source is present. The device is forced to operate in PWM when SYNC is connected to a clock source. Buck Output Monitoring (PGOOD) Ordering Information The EV kits provide a power-good output test point PART TYPE (PGOOD) to monitor the status of the buck output (OUT). PGOOD is low impedance when the output voltage is in MAX20075EVKIT EV Kit regulation. PGOOD is high impedance when the output MAX20076EVKIT EV Kit voltage drops below 6.5% (typ) of its nominal regulated Denotes RoHS compliant. voltage. To obtain a logic signal, pull up PGOOD to V by BIAS installing shunts on jumpers PU and LED. Maxim Integrated 2 www.maximintegrated.com =