Click here for production status of specific part numbers. Evaluates: MAXM17537 15V Output MAXM17537 15V Output Evaluation Kit General Description Benefits and Features The Himalaya series of voltage regulator ICs and power Wide 19V to 60V Input Range modules enable cooler, smaller, and simpler power- Highly Integrated Solution with Built-In Shielded supply solutions. The MAXM17537EVKIT 15V-output Inductor evaluation kit (EV kit) is a demonstration circuit of Programmed 15V Output, Up to 3A Output Current the MAXM17537 60V, 3A high-efficiency, current-mode, synchronous step-down DC-DC switching power 700kHz Switching Frequency module. The EV kit operates over a wide input-voltage MAXM17537 Offers High 95.6% Efficiency of 19V to 60V and provides up to 3A load current with a (V = 24V, V = 15V, I = 2A) IN OUT OUT 15V-output voltage. The EV kit is programmed to switch at All Ceramic Capacitors and Ultra-Compact Solution a frequency of 700kHz. The module is simple to use and easily configurable with minimal external components. Selectable PWM, DCM, and PFM Modes It features cycle-by-cycle peak current-limit protection, Programmable 4ms Soft-Start Time and Prebias undervoltage lockout (EN/UVLO), and thermal shutdown. Startup The EV kit includes the compact, 29-pin, 15mm x 9mm x Open-Drain RESET Output Pulled Up to 5V V CC 4.32mm SiP package MAXM17537 module installed and Programmable EN/UVLO Threshold is rated to operate over the full industrial -40C to 125C Provision for External Frequency Synchronization temperature range. Hiccup Over Current Protection (OCP) The MAXM17537 module data sheet provides a complete description of the part that should be read in conjunction Overtemperature Protection (OTP) with this data sheet prior to operating the EV kit. For full -40C to +125C Industrial Temperature Range module features, benefits and parameters, refer to the Complies with CISPR22(EN55022) Class B MAXM17537 data sheet. Conducted and Radiated Emissions Ordering Information appears at end of data sheet. 319-100441 Rev 0 10/19Evaluates: MAXM17537 15V Output MAXM17537 15V Output Evaluation Kit Soft-Start Input (SS) Quick Start The MAXM17537 module implements adjustable soft- Recommended Equipment start operation to reduce inrush current. A capacitor con- MAXM17537EVKIT evaluation kit nected from the SS pin to SGND programs the soft-start 19V to 60V DC, 3A power supply time. The selected output capacitance (C ) and the SEL output voltage (V ) determine the minimum required OUT Dummy load capable of sinking 3A soft-start capacitor as follows: Digital voltmeter (DVM) -6 C 28 x 10 x C x V SS SEL OUT 100MHz dual-trace oscilloscope The soft-start time (t ) is related to the capacitor con- SS Equipment Setup and Procedure nected at SS (C ) by the following equation: SS The MAXM17537EVKIT is fully assembled and tested. t = C /5.55 SS SS Follow the steps below to verify board operation. where t is in ms and C is in nF. For example, to SS SS Caution: Do not turn on the power supply until all program a 4ms soft-start time, a 22nF capacitor should be connections are completed. connected from the SS pin to SGND. 1) Set the power supply at a voltage between 19V and Regulator Enable/Undervoltage- 60V. Disable the power supply. Lockout Level (EN/UVLO) 2) Connect the positive and negative terminals of the The EV kit offers an adjustable input undervoltage-lockout power supply to VIN and PGND PCB pads, respectively. level by resistor-dividers connecting between the IN, EN/ 3) Connect the positive and negative terminals of the 3A UVLO, and SGND pins. For normal operation, a shunt load to OUT and PGND PCB pads, respectively, and should not be installed across pins 1-2 on J1 to enable the then set the load to 0A. output through an internal pullup 3.32M resistor from the EN/UVLO pin to the IN pin. To disable the output, install 4) Connect the DVM across the OUT PCB pad and the the shunt across pins 1-2 on J1 to pull the EN/UVLO pin PGND PCB pad. to SGND. See Table 1 for J1 setting details. The EV kit 5) Verify that shunts are not installed on jumper J1. also provides an R3 resistor to program a UVLO thresh- See Table 1 for details. old voltage at which an input-voltage level device turns 6) Select the shunt position on jumper J2 according to the on. The R3 resistor can be calculated by the following intended mode of operation. See Table 2 for details. equation: R3 = 3320 x 1.215/(V 1.215) 7) Enable the input power supply. INU where V is the input voltage at which the device is 8) Verify the DVM display 15V. INU required to turn on, and R3 is in k. 9) Increase the load up to 3A to verify the output voltage is 15V using DVM. Table 1. EN/UVLO Enable/Disable Detailed Description Configuration (J1) The MAXM17537EVKIT is a proven circuit to demon- SHUNT MAXM17537 strate the high-voltage, high-efficiency, and compact-size EN/UVLO PIN POSITION OUTPUT solution of the MAXM17537 synchronous step-down DC-DC power module. The output voltage is preset to 1-2 Connected to SGND Disabled 15V to operate from 19V to 60V input and provides up to Connect to the Enabled, UVLO 3A load current. The optimal frequency is set at 700kHz Not center node of level set through the to maximize efficiency and minimize component size. The installed* resistor-divider 3.32M and EV kit includes five test points: TP1 for monitoring the 3.32M and R3 R3 resistors V , TP2 for monitoring the RESET, TP3 for measuring CC the LX voltage, TP4 for monitoring the DL voltage, and *Default position. TP5 for measuring the BST voltage. Maxim Integrated 2 www.maximintegrated.com