DEMO MANUAL DC2106B-B LTM4676AEY 130A Step-Down Module Regulator with PMBus Power System Management Description 2 Demonstration circuit 2106B-B is a high efficiency, high LTCs I C/SMBus/PMBus dongle DC1613A to connect to density, Module regulator with 4.5V to 16V input range. the board. LTpowerPlay allows the user to reconfigure the The output voltage is adjustable from 0.5V to 1.8V, and it part on the fly and store the configuration in EEPROM, can supply 130A maximum load current. The demo board and view telemetry of voltage, current, temperature and has 1 LTM 4676A and 3 LTM4630 Module regulators. fault status. The LTM4676A is a dual 13A or single 26A step-down GUI Download regulator with PMBus power system management, and the LTM4630 is a dual 18A or single 36A step-down regulator. The software can be downloaded from: Please see LTM4676A and LTM4630 data sheets for more DEMO MANUAL DC2106B-B p s Specifications are at T = 25C A PARAMETER CONDITION VALUE Input Voltage Range 4.5V to 16V Output Voltage, V V = 4.5V to 16V, I = 0A to 130A 0.5V to 1.8V, Default: 1V OUT0 IN OUT0 Maximum Output Current, I V = 4.5V to 16V, V = 0.5V to 1.8V 130A OUT0 IN OUT Typical Efficiency V = 12V, V = 1V, I = 130A 82.9% IN OUT OUT Default Switching Frequency 350kHz Quick s p D Demonstration circuit 2106B-B is easy to set up to evaluate 6. Connect the dongle and control the output voltages the performance of the LTM4676AEY. Refer to Figure 2 from the GUI. See LTpowerPlay GUI for the LTM4676A for the proper measurement equipment setup and follow Quick Start Guide for details. the procedure below. Note: When measuring the output or input voltage ripple, 1. With power off, connect the input power supply to V do not use the long ground lead on the oscilloscope probe. IN (4.5V to 16V) and GND (input return). See Figure 3 for the proper scope probe technique. Short, stiff leads need to be soldered to the (+) and () terminals 2. Connect the output load between V and GND (Initial OUT0 of an output capacitor. The probes ground ring needs to load: no load). touch the () lead and the probe tip needs to touch the 3. Connect the DVMs to the input and outputs. Set default (+) lead. switch position: SW1: ON SW2: ON. Connecting a PC to DC2106B-B 4. Turn on the input power supply and check for the proper output voltages. V should be 1V 1%. You can use a PC to reconfigure the power management OUT0 features of the LTM4676A such as: nominal V , margin OUT 5. Once the proper output voltages are established, ad- set points, OV/UV limits, temperature fault limits, sequenc- just the loads within the operating range and observe ing parameters, the fault log, fault responses, GPIOs and the output voltage regulation, ripple voltage and other other functionality. The DC1613A dongle may be plugged parameters. when V is present. IN Table 1. LTM4676/LTM4676A Demo Cards for Up to 130A Point-of-Load Regulation NUMBER OF LTM4676/LTM4676A MODULE MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUT VOLTAGES REGULATORS ON THE BOARD DEMO BOARD NUMBER 13A, 13A 2 1x LTM4676 DC1811A/DC1811B-A 13A, 13A 2 1x LTM4676A DC1811B-B 26A 1 1x LTM4676 DC2087A 50A 1 2x LTM4676 DC1989A-A 75A 1 3x LTM4676 DC1989A-B 100A 1 4x LTM4676 DC1989A-C 100A 1 1x LTM4676 (+ 3x LTM4620A) DC2106A-A 130A 1 1x LTM4676 (+ 3x LTM4630) DC2106A-B 100A 1 1x LTM4676A (+ 3x LTM4620A) DC2106B-A 130A 1 1x LTM4676A (+ 3x LTM4630) DC2106B-B dc2106bbf 2 ure roce tart ummary erformance