LTM4650A-1

Demonstration circuit 2268A-I is a high efficiency, high density, dual 8A, switch mode step-down power supply on a compact 1.5' × 1.2' PCB. It features the LTM4650A-1 μModule^® regulator. The input voltage is from 4.5V to 16V. The output voltage is programmable from 0.6V to 5.3V. DC2268A-I can deliver up to 25A maximum in each channel. As explained in the data sheet, output current derating is necessary for certain V_IN, V_OUT, and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the resistor jumper (R1/R2) selects pulse-skipping mode for noise sensitive applications or Burst-Mode® in less noise sensitive applications. Two outputs can be connected in parallel for a single 50A output solution with optional jumper resistors. The board allows the user to program how its output ramps up and down through the TRACK/SS pin. Remote output voltage sensing is available for improved output voltage regulation at the load point. An optional input inductor L1 reduces the EMI noise for noise sensitive applications. DC2268A can be easily inserted to an edge connector for testing and debugging. These features and the availability of the LTM4650A-1 in a compact 16mm × 16mm × 4.41mm LGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4650A-1 data sheet must be read in conjunction with this demo manual for working on or modifying the DC2268A-I.

Demonstration circuit 2603A-B features the LTM4650AEY-1, the high efficiency, high density, dual 25A, single 50A switch mode step-down power module regulator. The input voltage is from 4.5V to 16V. The output voltage is programmable from 0.6V to 5.5V. DC2603A-B can deliver 25A maximum current from each channel. The board designs with minimum components to demonstrate this high efficiency, high density μModule^®. As explained in the data sheet, output current derating is necessary for certain V_IN, V_OUT, and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE jumper (JP1) selects pulse-skipping mode for noise sensitive applications or Burst Mode^® operation in less noise sensitive applications. Two outputs can be connected in parallel for a single 50A output solution with optional jumper resistors. The board allows the user to program how its output ramps up and down through the TRACK/SS pin. The output can be set up to either coincidentally or ratiometrically track with another supply’s output. Remote output voltage sensing is available for improved output voltage regulation at the load point. These features and the availability of the LTM4650AEY-1 in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load applications. The LTM4650A-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2603A-B.

演示电路3064A采用PolyPhase^®设计，内置高效率、高密度、双路25A开关模式降压μModule^®稳压器LTM4650AEY-1。输入电压范围为4.5V至16V。输出电压可通过跳线在1.0V至5.1V范围内选择。DC3064A可提供200A的标称输出电流。如数据手册中所述，某些V_IN、V_OUT和热条件需要输出电流降额。DC3064A上的LTM4650A-1始终以连续导通模式运行。开关频率可通过电阻器编程，也可与外部时钟信号同步。该板允许用户通过TRACK引脚编程其输出电压如何斜升和斜降。通过远程输出电压检测，将输出电压严格控制在“VO+”和“VO–”之间，以改善重载条件下的输出电压调节。LTM4650AEY-1采用紧凑的16mm×16mm×5.01mm BGA封装，这些特性以及可用性使其非常适合许多高密度、负载点调整应用。在处理或修改演示电路DC3064A之前，必须结合本演示手册阅读LTM4650A-1数据手册。