DEMO MANUAL DC2081A-B LTM4630EY-1 Dual 18A or Single 36A Module Regulator with 0.8% DC and 3% Transient Accuracy Description Demonstration circuit 2081A-B features the LTM 4630EY-1, necessary for certain V , V , and thermal conditions. IN OUT the high efficiency, high density, dual 18A, switch mode These features and the availability of the LTM4630EY-1 step-down Module regulator with 0.8% total DC output in a compact 16mm 16mm 5.01mm BGA package accuracy. The input voltage is from 4.5V to 15V. The output make it ideal for use in many high-density point-of-load voltage is programmable from 0.6V to 1.8V. DC2081A-B is applications. The LTM4630-1 data sheet must be read configured as dual-phase, single-output, which can deliver in conjunction with this demo manual for working on or up to 36A maximum. With the help of external compensa- modifying the demo circuit DC2081A-B. tion, 3% transient accuracy can be achieved with 25% Design files for this circuit board are available at load step. The board designs with minimum components DEMO MANUAL DC2081A-B Dc 2081a -B Boar D p Quick s p D Demonstration circuit DC2081A-B is easy to set up to 3. Once the proper output voltage is established, adjust the evaluate the performance of the LTM4630-1. 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 0.8% (0.992V ~ 1.008V). 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-bfa 2 ure roce tart hoto