Click here for production status of specific part numbers. Evaluates: MAXM17532 MAXM17532 Evaluation Kit 5V Output-Voltage Application General Description Quick Start The MAXM17532 evaluation kit (EV kit) is a demonstra- Recommended Equipment tion circuit of the MAXM17532 42V,100mA ultra-small, MAXM17532EVKIT , MAXM17532 evaluation kit high efficiency, current mode, synchronous step-down 42V DC power supply DC-DC switching power module. The EV kit operates over a wide input-voltage of 10V to 42V and provides up Dummy load capable of sinking 100mA to 100mA load current with a 5V output voltage. The EV Digital voltmeter (DVM) kit is programmed to switch at a frequency of 600kHz. 100MHz dual-trace oscilloscope The module is simple to use and easily configurable with minimal external components. It features cycle-by- Procedure cycle peak current-limit protection, undervoltage lockout The MAXM17532 EV kit is fully assembled and tested. (EN/UVLO), and thermal shutdown. Please follow the steps below to verify the board opera- The EV kit comes with the compact 10-pin 2.6mm x tion. Caution: Do not turn on the power supply until all 3mm x 1.5mm uSLIC package MAXM17532 module connections are completed. installed, and is rated to operate over the full industrial/ 1) Set the power supply at a voltage between 10V and automotive -40C to +125C temperature range. 42V. Disable the power supply. 2) Connect the positive and negative terminals of the Features power supply to VIN and GND PCB pads, respectively. Wide 10V to 42V Input 3) Connect the positive and negative terminals of the 1.75% Feedback Voltage Accuracy 100mA load to VOUT and GND PCB pads respec- Output: 5V,100mA tively, and the set the load to 0A. Internally Compensated 4) Connect the DVM across the VOUT PCB pad and the All Ceramic Capacitors and Ultra-Compact Solution GND PCB pad closest to VOUT PCB pad. PFM or Forced-PWM Mode of Operation 5) Enable the input power supply. Shutdown Current as Low as 1.2A (typ) 6) Verify the DVM across output display 5V. Programmable Soft-Start and Prebias Startup 7) Increase the load up to 100mA to verify the output voltage is 5V using DVM. Open-Drain Power Good Output (RESET pin) Programmable EN/UVLO Threshold Hiccup Overcurrent Protection (OCP) Overtemperature Protection (OTP) Complies with CISPR22 (EN55022) Class B Ordering Information appears at end of data sheet. Conducted and Radiated Emissions Passes Drop, Shock, and Vibration Standards JESD22-B103, B104, B111 uSLIC is a trademark of Maxim Integrated Products, Inc. -40C to +125C Industrial/Automotive Temperature Range 319-100067 Rev 1 8/18Evaluates: MAXM17532 MAXM17532 Evaluation Kit 5V Output-Voltage Application operates in a constant-frequency forced-PWM mode at Detailed Description of Hardware all loads. The mode of operation cannot be changed on- The MAXM17532 EV kit is a proven circuit to demonstrate the-fly during normal operation of the device. Refer to the the high-voltage, high-efficiency, and compact solution MAXM17532 module data sheet for more information on size of the MAXM17532 synchronous step-down DC-DC the PWM and PFM modes of operation. Table 1 shows the power module. The output voltage is preset to 5V to EV kit jumper settings that can be used to configure the operate from 10V to 42V input and provides up to 100mA desired mode of operation. load current. The optimal frequency is set at 600kHz to maximize efficiency and minimize component size. The External Synchronization (RT/SYNC) EV kit includes two test points, TP1 for monitoring the LX The RT/SYNC pin can be used to synchronize modules and TP2 for measuring the RESET voltage. internal oscillator to an external system clock. Refer to the External Synchronization section in the MAXM17532 Soft-Start Input (SS) data sheet for additional information on configuring the The module offers a fixed 5.1ms internal soft-start when external clock synchronization. the SS pin is left unconnected. When adjustable soft-start time is required, connect a capacitor from SS to GND to Reset Output (RESET) program the soft-start time. The minimum soft-start time is The module includes an open-drain RESET output to related to the output capacitance (C ) and the output OUT monitor output voltage. RESET should be pulled up with voltage (V ) by the following equation: OUT an external resistor to the desired external power supply t > 0.05 x C x V less than or equal to 5.5V. RESET goes high-impedance SS OUT OUT 2ms after the output rises above 95% of its nominal set where t is in milliseconds and C is in F. SS OUT value and pulls low when the output voltage falls below Soft-start time (t ) is related to the capacitor connected SS 92% of the set nominal output voltage. RESET asserts low at SS (C ) by the following equation: 3 during the hiccup timeout period. In this EV kit, R7 resistor C = 6.25 x t 3 SS can be used to pull up the RESET to the output voltage. where t is in ms and C is in nF. SS 3 Table 1. MODE Configuration (J1) Mode Selection (MODE) POSITION MODE PIN MAXM17532 OPERATION The device features a MODE pin for selecting either forced-PWM or PFM mode of operation. If the MODE pin 1-2 Connected to GND PWM mode is left unconnected, the device operates in PFM mode Not Installed Open PFM mode at light loads. If the MODE pin is grounded, the device Maxim Integrated 2 www.maximintegrated.com