Click here for production status of specific part numbers. Evaluates: MAXM17712/MAXM17720/ MAXM17712/MAXM17720/ MAXM17724 Modules Application MAXM17724 Evaluation Kit General Description Features The MAXM17712/MAXM17720/MAXM17724 evaluation Wide 5.5V to 60V Input Range kits (EV kit) provide a proven design to evaluate the MAXM17712 Offers High 82%Efficiency performance of MAXM17712/MAXM17720/MAXM17724 (V = 24V, V = 3.3V, I = 75mA) IN OUTB OUTB modules. Each of these modules operates over a wide MAXM17720 Offers High 85% Efficiency input range from 5.5V to 60V, and features an integrated (V = 24V, V = 5V, I = 75mA) IN OUTB OUTB 150mA step-down converter and 50mA linear regulator. The modules are configured to demonstrate optimum MAXM17724 Offers High 85% Efficiency (V = 24V, V = 5V, I = 75mA) performance and component sizes in this EV kit. IN OUTB OUTB Enable/UVLO Input, Resistor-Programmable MAXM17712 delivers up to 150mA from the 3.3V fixed output step-down converter, and up to 50mA from the UVLO Threshold 1.8V fixed output linear regulator. The step-down convert - Selectable PWM and PFM Modes of Operation er is configured to operate at 375kHz switching frequency, Provision to Synchronize the Step-Down Converters over a 5.5V to 60V input range. to External-Clock Source MAXM17720 delivers up to 150mA from the 5V fixed out - Low-Profile, Surface-Mount Components put step-down converter, and up to 50mA from the 3.3V Proven PCB Layout fixed output linear regulator. The step-down converter is configured to operate at 570kHz switching frequency, Fully Assembled and Tested over an 8.4V to 60V input range. RESET Outputs, with Pullup Resistor to Respective MAXM17724 is configured to deliver up to 150mA from Output Voltages the adjustable output step-down converter programmed Complies with CISPR22(EN55022) Class B to 5V, and up to 50mA from the 2.5V fixed output linear Conducted and Radiated Emissions regulator. The step-down converter is configured to oper - ate at 570kHz switching frequency, over an 8.4V to 60V Ordering Information appears at end of data sheet. input range. The EV kits feature provisions for selecting mode of operation (PWM or PFM), synchronization to an external clock source, enable/disable, and UVLO settings. The MAXM17710MAXM17726 module family data sheet provides a complete description of the parts and should be read in conjunction with this data sheet prior to operat- ing the EV kits. 319-100403 Rev 0 7/19Evaluates: MAXM17712/MAXM17720/ MAXM17712/MAXM17720/ MAXM17724 Evaluation Kit MAXM17724 Modules Application Quick Start Detailed Description The MAXM17712/MAXM17720/MAXM17724 EV kits are Required Equipment designed to demonstrate the salient features of the One 60V DC power supply MAXM17712/MAXM17720/MAXM17724 power modules. Digital multimeters (DMM) The EV kits consist of typical application circuits of three different modules. Each of these circuits are electrically Load resistor for step-down converter capable of isolated from each other and hosted on the same PCB. sinking 150mA Each of the modules can be evaluated by powering them Load resistor for linear regulator capable of from their respective input pins. Individual module settings sinking 50mA can be adjusted to evaluate the performance under differ- Equipment Setup and Procedure ent operating conditions. The EV kits are fully assembled and tested. Follow the steps Setting Switching Frequency below to verify and test an individual module s operation. Selection of switching frequency must consider input volt- Caution: Do not turn on power supply until all con- age range, desired output voltage, t and t ON(MIN) OFF(MIN) nections are completed. of the step-down converters. Resistors R15, R25, and R35 1) Set the input power supply at a voltage between 5.5V on the EV kits program the desired switching frequencies and 60V (for MAXM17712), or between 8.4V and of the step-down converters. To optimize performance 60V (for MAXM17720 and MAXM17724). Disable the and component size, 375kHz switching frequency is power supply. chosen for the step-down converter in MAXM17712, and 2) Connect the positive terminal and negative terminal of 570kHz is chosen for MAXM17720 and MAXM17724 step- the power supply to the V pad and its adjacent GND down converters. Use Table 1 and Switching Frequency IN pad of the module under evaluation. section of MAXM17710-MAXM17726 data sheet to choose different values of resistors for programming the 3) Connect a maximum of 50mA resistive load across required switching frequency. OUTL pad and its adjacent GND pad of the corre- sponding module. Enable/Undervoltage Lockout 4) Connect a maximum of 150mA resistive load across (EN/UVLO) Programming OUTB pad and its adjacent GND pad of the corre- The MAXM17712/MAXM17720/MAXM17724 offer an sponding module. Note that the step-down converter adjustable input undervoltage lockout level for the step- powers the linear regulator. Ensure that the total load down converter. In the EV kits, for normal operation, leave on step-down converter does not exceed 150mA. the jumpers (JU11, JU21, JU31) open. When jumper 5) Verify that the shunts are not installed on jumpers JU11 is left open, MAXM17712 is enabled when the input (JU11, JU21, JU31) (see Table 1 for details). voltage rises above 5.5V. When jumpers JU21 and JU31 are left open, MAXM17720 and MAXM17724 modules 6) Select the shunt position on respective jumpers are enabled when the input voltage rises above 8.4V. To (JU12, JU22, JU32) according to the required mode disable the modules, install shunts across pins 1-2 on of operation (see Table 2 for details). jumpers (JU11, JU21, JU31). See Table 1 for jumpers 7) Connect digital multimeters (in voltage measurement (JU11, JU21, JU31) settings. mode) across the OUTB, OUTL and their respective A potential divider formed by the resistors R (R11, UPPER GND pads. R21, R31) and R (R12, R22, R32) sets the input LOWER 8) Turn on the input power supply. voltage (V ) at which the module is enabled. INU 9) Verify that the DMMs display expected terminal volt- Choose R (R11, R21, R31) to be 3.32M and then UPPER ages with respect to GND. calculate R (R12, R22, R32) as follows: LOWER R 1.215 UPPER R = LOWER ( V 1.215 ) INU Where R (R12, R22, R32) in M. LOWER Maxim Integrated 2 www.maximintegrated.com