DC1623A Analog Devices

DEMO MANUAL DC1623A LTM8033: 36V , 3A Low EMI Step-Down IN Module Regulator DESCRIPTION Demonstration circuit DC1623A features the LTM 8033, a at light loads. The LTM8033 data sheet must be read in low-EMI EN55022 Class B certified step-down Module conjunction with this quick start guide prior to working regulator, pre-configured for a 3.3V output from a 5.5V on or modifying demo circuit DC1623A. to 36V input. The circuit supports other features of the Design files for this circuit board are available at LTM8033 including synchronization to an external clock, DEMO MANUAL DC1623A QUICK START PROCEDURE Demonstration circuit DC1623A is an easy way to evalu- 3. Turn on the power at the input. ate the performance of the LTM8033. Refer to Figure 1 4. Check for the proper output voltage. for proper measurement equipment setup and follow the NOTE: If there is no output, temporarily disconnect the load procedure below: to make sure that the load is not set too high or is shorted. NOTE: When measuring the input or output voltage ripple, 5. Once the proper output voltage is established, adjust care must be taken to avoid a long ground lead on the the loads within the operating range and observe the oscilloscope probe. Measure the input or output voltage output voltage regulation, ripple voltage, efficiency and ripple by touching the probe tip directly across the terminals other parameters. of the input or output capacitors. See Figure 2 for proper scope probe technique. 6. An external clock can be added to the SYNC pin when SYNC function is used. See the Synchronization section 1. Place JP1 in the ON position. in the data sheet for details. 2. With power off, preset the input power supply within the operating input voltage range and connect to V IN and GND. dc1623af 2