Evaluation platform for RPX-4.0 buck regulator Features module Evaluation Module Thermal design considerations included EMI class B filter Evaluation Easy evaluation of output voltage selection, Module control, and sensing functions RPX-4.0-EVM-1 Description The RPX-4.0-EVM-1 generates a constant output voltage selectable from 1.0VDC to 7VDC from a DC input in the range of 4 36VDC. It has a maximum continuous output current of 4.0A. All the functions of the RPX-4.0 such as output voltage selection, control, power good, trim, and output sense can be readily evaluated. The behavior in overload or over-temperature can be evaluated easily before the module is designed in. The evaluation board also contains the filter components to meet EMC class B levels. Alternate component positions are included to allow experimentation to optimize the EMC performance depending on operating conditions and budget. Selection Guide Part Input Voltage Output Output (1) Number Range Voltage Current max. VDC VDC A RPX-4.0-EVM-1 4 - 36 1.0, 1.8, 3.3, 5 4.0 Notes: Note1: refer to SAFE OPERATING AREA of RPX-4.0 datasheet Quick Start Guide 1. Connect P to power supply (observe correct polarity) 1 2. Connect P to the load (no load operation is allowed. For 5V , please refer to safe operating 2 OUT area in the RPX-4.0 datasheet) 3. The evaluation module is preset to 5V . OUT The output voltage can be selected for values of 1.0VDC, 1.8VDC, 3.3VDC, and 5VDC by shorting a 0W resistor to the respective places as seen in the board silkscreen. Please refer to safe operating area in the RPX-4.0 module datasheet. 4. UVLO (Undervoltage Lockout) circuitry implements internal UVLO on the V pin. The device is IN disabled when the internal voltage is under 3.55VDC(typ.). When a higher UVLO threshold is required, assemble resistor R . Refer to the RPX-4.0 module datasheet for R values. 2 2 5. CTRL The device is preset as normally on. It can be disabled by pulling the CTRL pin to GND. Short R to disable the device. 2 Caution: ESD sensitive. Always follow ESD preventative procedures when handling the product www.recom-power.com REV.: 0/2021 P-1RPX-4.0-EVM-1 Evaluation Module Specifications (measured Ta= 25C, full load and after warm-up unless otherwise stated) Component Placement Connector Description P1 P2 Pin Name Description Pin Name Description 1 VIN Positive Input Voltage (observe correct polarity ) 1 GND Common GND 2 GND Common GND 2 VOUT Positive Output Voltage Pads Direct Connection Pin Name Description 1 VIN Positive Input Voltage 2 GND Negative Input Voltage (GND) 3 CTRL CTRL Pad (leave open if not used) or UVLO setting 4 GND Negative Input Voltage (GND) 5 PGOOD Power Good Signal 6 GND Negative Input Voltage (GND) 7 TRIM TRIM Pad (leave open if not used) 8, 9 SENSE Output Voltage Sense Pin (leave open if not used) 10 VOUT Positive Output Voltage 11 GND Negative Output Voltage (GND) www.recom-power.com REV.: 0/2021 P-2