LTM4650-1

演示电路 2268A-H 是紧凑型 1.5 英寸 × 1.2 英寸 PCB 占板面积的高效率、高密度、双路 25A 开关模式降压型电源。该演示电路采用了 LTM4650-1 µModule® 稳压器。输入电压范围为 4.5V 至 15V。输出电压可编程范围为 0.6V 至 1.8V。DC2268A-H 每个通道可提供高达 25A 的最大电流。如数据手册中所述，对于某些 V_IN、V_OUT和热状况，必须进行输出电流降额处理。在重负载条件下，该演示板以连续导通模式运行。为了在低负载电流下实现高效率，电阻器跳线 (R1/R2) 选择脉冲跳跃模式 (对于噪声敏感型应用)或突发模式 Burst Mode^® 操作(对于噪声敏感度较低的应用)。使用任选的跳线电阻器可将两个输出并联连接，以实现单路 50A 输出解决方案。该演示板使用户可通过TRACK/SS 引脚设置其输出的斜坡上升和斜坡下降方式。远端输出电压采样可用于改善负载点上的输出电压调节性能。在对噪声敏感的应用中，任选的输入电感器 L1 可降低 EMI 噪声。DC2268A 可容易地插入边缘连接器以进行测试和调试。由于拥有这些特性并可提供紧凑型 16mm × 16mm × 5.01mm BGA 封装，因而使得 LTM4650-1 非常适用于许多高密度负载点调节应用。在处理或修改 DC2268A-H 时，必须结合本演示手册阅读 LTM4650-1 数据手册。

演示电路2479A-B内置具有外部补偿功能的高效率、高密度、双通道25A、单通道50A开关模式降压电源模块稳压器LTM4650EY-1。输入电压范围为4.5V至15V。输出电压的可编程范围为0.6V至1.8V。DC2479A-B配置为双相、单路输出，可提供高达50A的最大电流。该电路板使用较少的元件即可设计以演示此高效率、高密度μModule。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。LTM4650EY-1采用16mm × 16mm × 5.01mm BGA封装以及许多特性和可用性，使其适合许多高密度负载点应用。在处理或修改演示电路DC2479A-B之前，必须结合本演示手册阅读LTM4650-1数据手册。

Demonstration Circuit 2455A-C features PolyPhase^® design using four LTM4650EY-1 (B-grade) high efficiency, high density, dual 25A, switch mode step-down power module regulators. The input voltage is from 4.5V to 15V. The output voltage is jumper selectable from 0.9V to 1.8V. DC2455A-C can deliver nominal 200A output current. As explained in the data sheet, output current de-rating is necessary for certain V_IN, V_OUT, and thermal conditions.

DC2455A-C always operates in continuous conduction mode. The switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. The board allows the user to program how its output voltage ramps up and down through the TRACK pin. The output voltage is tightly regulated between test points “V_O+ ” and “V_O– ” through remote output voltage sensing, which improves output voltage regulation at heavy loads. These features and the availability of the LTM4650EY-1 in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2455A-C.

Demonstration Circuit 2455A-A features PolyPhase^® operation using two LTM4650EY-1 (B-grade), high efficiency, high density, dual 25A/single 50A, switchmode step-down µModule regulators in parallel. The DC2455 input voltage is from 4.5V to 15V, and the output voltage is jumper-selectable from 0.9V to 1.8V. The output voltage is tightly regulated between pins “Vo+” and “Vo–” using remote output voltage sensing, which improves output voltage regulation at heavy loads. DC2455A-A delivers a nominal 100A output current.

As explained in the data sheet, output current derating is necessary for certain VIN, VOUT and thermal conditions. DC2455A-A is configured for continuous conduction mode. The nominal 1MHz switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. The board allows the user to program output voltage ramp up and ramp down via the TRACK pin.  These features and the availability of the LTM4650EY-1 in a compact 16mm × 16mm × 5.01mm BGA package make the LTM4650-1 ideal for use in many high-density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2455A-A.

 

Demonstration Circuit 2455A-B features PolyPhase^® design using three LTM4650EY-1 (B-grade high efficiency, high density, dual 25A, switch mode step-down power module regulators. The input voltage is from 4.5V to 15V. The output voltage is jumper selectable from 0.9V to 1.8V. DC2455A-B can deliver nominal 150A output current. As explained in the data sheet, output current de-rating is necessary for certain V_IN , V_OUT , and thermal conditions. DC2455A-B always operates in continuous conduction mode.

The switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. The board allows the user to program how its output voltage ramps up and down through the TRACK pin. The output voltage is tightly regulated between test points “V_O+ ” and “V_O– ” through remote output voltage sensing, which improves output voltage regulation at heavy loads. These features and the availability of the LTM4650EY-1 in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2455A-B.

Demonstration circuit DC2378A-B features the LTM4650EY-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 15V. The output voltage is programmable from 0.6V to 1.8V. DC2378A-B can deliver 25A maximum current from 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 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 LTM4650EY-1 in a compact 15mm × 15mm × 5.01mm BGA package make it ideal for use in many high density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2378A-B.