Evaluates: MAX44298 MAX44298 Evaluation Kit General Description Quick Start The MAX44298 evaluation kit (EV kit) provides a proven Required Equipment design to evaluate the MAX44298 current, voltage, and Before beginning, the following equipment is needed: power monitor. The device offers a precision power monitor MAX44298 EV kit with very low offset for low-side monitoring. This EV kit demonstrates the MAX44298 in an ultra-small, 2.4mm x +3V to +5.5V, 100mA DC power supply 2.4mm, 16-bump wafer-level package (WLP) with 0.5mm +0.4V to +1.005V DC power supply bump spacing. Precision DC voltage source The EV kit PCB is preconfigured with the CSA full-scale Five digital multimeters (DMMs) input voltage range (V ) of 10mV and 100A of SENSE output current ranges, but can be reconfigured to Procedure 10mV/5mV of FS V or 50A of output current by SENSE The EV kit is fully assembled and tested. Follow the steps changing a few jumpers. below to verify board operation. Caution: Do not turn on The EV kit comes with a MAX44298EWE+ and a voltage power supply until all connections are made. divider to provide a forced full-scale V of 10mV SENSE 1) Set the +3V to +5.5V supply to +3.3V and turn it off. range at the CSA inputs installed. Connect the positive terminal of the supply to the VDD test point and the negative terminal of the Features supply to the nearest GND test point. Precision Real-Time, Low-Side Current /Voltage/ 2) Set the +0.4V to +1.005V supply to +1V and turn it Power Monitoring off. Connect the positive terminal of the supply to +3V to +5.5V Single-Supply Voltage Range the VIN test point and the negative terminal of the Proven PCB Layout supply to the nearest GND test point. Fully Assembled and Tested 3) Set the precision DC voltage source to 5mV and turn it off. Apply this voltage source across the V SENSE Ordering Information appears at end of data sheet. inputs as a forced voltage V (i.e., connect the SENSE positive terminal of the DC voltage source to the RS+ test point and connect its negative terminal to the RS- test point). 4) Connect one DMM across RS+ and RS- to monitor the V input. Connect each DMM to each output of SENSE the device (IOUT, VOUT, POUT, and REF) to monitor the output voltages. 5) Enable all supplies. 6) Observe the output voltage from all four digital voltmeter displays. Verify that V = 1.2V, IOUT V = 2.4V, V = 1.2V and V = 2.4V. VOUT POUT REF 19-7855 Rev 0 11/15Evaluates: MAX44298 MAX44298 Evaluation Kit Table 1. Jumper Description SHUNT JUMPER DESCRIPTION POSITION 1-2 Sets the full-scale output current to 50A. JU1 1-3 Reserved (ISET) 1-4* Sets the full-scale output current to 100A. Enters calibration mode, sets the output current to 10A (for IOUT, VOUT, and POUT) and 1-2 full-scale output current set by JU1 (for the REF). JU2 (CAL) 1-3 Reserved 1-4* Sets the device in normal operation mode and the output current full scale is set by JU1. 1-2 Connects G0 to logic 1 to set the full-scale sensing voltage range (VFS). See Table 2. JU3 1-3 Reserved (G0) 1-4* Connects G0 to logic 0 to set the full-scale sensing voltage range (VFS). See Table 2. 1-2* Connect G1 to logic1 to set the full-scale sensing voltage range (VFS). See Table 2. JU4 2-3 Reserved (G1) 1-4 Connect G1 to logic 0 to set the full-scale sensing voltage range (VFS). See Table 2. *Default configuration Table 2. Full-Scale V Range Selection SENSE G1 G0 FS V R = 1m R = 2m R = 10m SENSE SENSE SENSE SENSE (JU4) (JU3) 0 1 5mV 5A 2.5A 0.5A 1* 0* 10mV* 10A 5A 1A 1 1 20mV 20A 10A 2A 0 0 Device enters power-down mode *Default configuration Output-Scaling Resistors: Detailed Description of Hardware R3, R4, R5, R6, and the ISET Input The MAX44298 EV kit low-side current-sensing measures The output-scaling resistors should all be the same value the load current by using a precision CSA, allowing and be of a type with very low temperature coefficients, accurate full-scale V ranges of 5mV, 10mV, and SENSE with metal film types being recommended. Metal foil is 20mV, providing scaled output current at IOUT. The floating more effective, though significantly more expensive. The source voltage is measured through a user-selectable chosen values of these resistors will depend on the ISET resistive-divider (dividing the source input voltage down setting. JU1 determines the full-scale output current range. to a full-scale VIN of 1.00V) and provides scaled output When ISET is connected to ground (JU1: 1-2), the full- current at VOUT. The device monitors the instantaneous scale output current from all four outputs will be 100A. input power by internally multiplying the scaled load When ISET is connected to VDD (JU1: 1-4), the full-scale current by a scaled fraction of the load voltage, providing current will be 50A. This can be a simple and convenient scaled output current at POUT. The device also provides way to change all four scaling resistors simultaneously. The a reference output current at the REF output. All four EV kit is shipped with all four 24k scaling resistors. output currents are converted to voltages by using scaled resistors (R3R6). Maxim Integrated 2 www.maximintegrated.com