Click here for production status of specific part numbers. MAX77504 WLP Evaluation Kit Evaluates: MAX77504 (MAX77504AAWE+/MAX77504BAWE+) General Description Features and Default Settings The MAX77504 evaluation kit (EV kit) provides a proven Sense Points for High-Accuracy Measurements design to evaluate the MAX77504, a 3A high-efficiency Accessible Test Points for EN, POK, FPWM, and buck converter. The IC is capable of 2.6V to 14V input OUTS and is output voltage configurable between 0.6V to 6V. Switching Frequency Configurable Between 500kHz The factory default output voltage of this EV kit is set at to 1.5MHz Through SEL 3.3V. Output voltage can be configured by changing the feedback resistor values (R3 and R4). Two GPIO pins are FPWM and Skip Mode Configurable (Skip Mode Default) available to support Force PWM and EN function. UVLO Rising = 2.6V, UVLO Falling = 2.4V Ordering Information appears at end of data sheet. SPECIFICATION TEST CONDITIONS MIN TYP MAX UNIT Input Voltage 2.6 14 V Output Voltage 0.6 6 V Default Output Voltage R3 = 49.9k, R4 = 11.1k 3.3 V Output Current 0 3 A Peak Efficiency 3.7V , 3.3V , 300mA load 97.6 % IN OUT MAX77504 Evaluation Board MAX77504 INPUT/OUTPUT SOLUTION SENSE PINS MAX77504 SOLUTION SILKSCREEN INPUT SUPPLY TERMINALS OUTPUT TERMINALS SKIP/FPWM CONFIGURATION RSEL CONFIGURATION 319-100465 Rev 0 11/19MAX77504 WLP Evaluation Kit Evaluates: MAX77504 (MAX77504AAWE+/MAX77504BAWE+) Quick Start Description of Hardware The MAX77504 EV kit demonstrates the MAX77504 buck Required Equipment converter. It regulates output from input voltage ranges MAX77504 EV kit from 2.6V to 14V. Configurable output range is from 0.6V Adjustable DC power supply with 14V and 3A to 6.0V with feedback resistors R3 and R4. The EV kit capability is suited with a general DC input. Table 1 lists jumpers and associated functions that are available on the EV kit. Digital Multimeters Procedure Design Procedure (Choosing RSEL) The EV kit is fully assembled and tested. Follow the steps The MAX77504 includes an RSEL pin to configure the below to verify board operation. Use twisted wires of switching frequency, mid-band gain, and active discharge appropriate gauge (20AWG) that are as short as possible on startup. The configuration selection resistor (RSEL) to connect the load and power sources. sets five bits of configuration options decoded in Table 2. Choose RSEL 4:0 carefully by following the procedure 1) Ensure that the EV kit has the correct jumper settings, outlined in the Design Procedure section of the IC data as shown in Table 1. sheet or refer to the Typical Application Circuits section of 2) Connect a DVM to the SUPS and GNDS sense pins the IC data sheet for a list of known good RSEL choices to measure input voltage. for common applications. Resistors with tolerance 1% 3) Connect a DVM to the OUTS and GNDS sense pins (or better) should be chosen for R7, with nominal values to measure output voltage. specified in Table 3. Ensure proper resistor configuration 4) Apply a power supply set to 0V (100mA current limit) by measuring the resistance across SEL and GND sense across the VIN and PGND terminals of the EV kit. points. Turn the supply on and increase the voltage to 12V. 5) Confirm the DVM connected to OUTS and GNDS reads the default output voltage of the EV kit (3.3V). Table 1. Default Shunt Positions and Jumper Descriptions NODE OR SHUNT JUMPER FUNCTION FUNCTION POSITION 1-2* Connects EN to V (MAX77504 is enabled by default). IN J1 EN 2-3 Connects EN to GND. 1-2 Enables FPWM function. J2 FPWM 2-3* Enables SKIP mode function. Potentiometer (R6) value configuration to set switching frequency , mid-band J3 RSEL 1-2 gain, and active discharge (Default RSEL = OPEN). Resistor (R7) value configuration to set switching frequency, mid-band gain, J4 RSEL 1-2 and active discharge (Default RSEL = OPEN). Resistor (R8) value configuration to set switching frequency, mid-band gain, J5 RSEL 1-2 and active discharge (Default RSEL = OPEN). J7 POK 1-2* Enables Power-OK indicator function. * Default position Maxim Integrated 2 www.maximintegrated.com