DC2081A-A Analog Devices

DEMO MANUAL DC2081A-A LTM4630EV High Efficiency Dual 18A or Single 36A Module Regulator DESCRIPTION Demonstration circuit 2081A-A features the LTM 4630EV, These features and the availability of the LTM4630EV the high efficiency, high density, dual 18A, switch mode in a compact 16mm 16mm 4.41mm LGA package step-down Module regulator. The input voltage is from make it ideal for use in many high-density point-of-load 4.5V to 15V. The output voltage is programmable from applications. The LTM4630 data sheet must be read in 0.6V to 1.8V. DC2081A-A is configured as dual-phase, conjunction with this demo manual for working on or single-output, which can deliver up to 36A maximum. modifying the demo circuit DC2081A-A. The board designs with minimum components to dem- Design files for this circuit board are available at onstrate this high efficiency, high density Module. As DEMO MANUAL DC2081A-A DC2081A-A BOARD PHOTO QUICK START PROCEDURE Demonstration circuit DC2081A-A is easy to set up to 3. Once the proper output voltage is established, adjust the evaluate the performance of the LTM4630EV. Please refer load within the operating range and observe the output to Figure 1 for proper measurement setup and follow the voltage regulation, output voltage ripple, efficiency and procedure below: other parameters. Output ripple can be measured at J6 with BNC cables. 1. With power off, connect the input power supply, load and meters as shown in Figure 1. Preset the load to 0A 4. (Optional) For optional load transient test, apply an ad- and V supply to 12V. justable pulse signal between IOSTEP CLK and GND IN test point. Pulse amplitude (3V ~ 3.5V) sets the load 2. Turn on the power supply at the input. The output volt- step current amplitude. The output transient current can age should be 1.0V 1.5% (0.985V ~ 1.015V). be monitored at the BNC connector J5 (15mV/A). The pulse signal should have very small duty cycle (<10%) to limit the thermal stress on the transient load circuit. dc2081a-af 2