DC1261A Analog Devices

DEMO MANUAL DC1261A LTM8022 36V, 1A Step-Down Module Regulator DESCRIPTION Demonstration circuit 1261A features the LTM 8022 step- The LTM8022 data sheet must be read in conjunction with down Module regulator delivering a 3.3V output from a demo manual prior to working on or modifying demo 4.5V to 36V input supply. As a step-down converter, the circuit DC1261A. LTM8022 requires a minimum amount of headroom to keep Design files for this circuit board are available at the output in regulation. The device may be synchronized DEMO MANUAL DC1261A QUICK START PROCEDURE Demonstration circuit 1261A is an easy way to evaluate 3. Turn on the input power supply. the performance of the LTM8022. Refer to Figure 1 for Note: Make sure that the input voltage does not exceed proper measurement equipment setup and follow the the maximum input voltage. procedure below: 4. Check for the proper output voltage. Note: When measuring the input or output voltage ripple, Note: If there is no output, temporarily disconnect the care must be taken to avoid a long ground lead on the load to make sure that the load is not set too high. oscilloscope probe. Measure the input or output voltage ripple by touching the probe tip directly across the VIN or 5. Once the proper output voltage are established, adjust VOUT and GND terminals. See Figure 2 for proper scope the load within the operating range and observe the probe technique. output voltage regulation, ripple voltage, efficiency and other parameters. 1. Place JP1 on the ON position. 2. With power off, preset the input supply within the op- erating range of the LTM8022 then connect the input power supply to VIN and GND. dc1261af 2