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.

デモ回路3064AはPolyPhase^®設計を特長としており、LTM4650AEY-1（高効率、高密度のデュアル25Aスイッチ・モード降圧電力μModule^®レギュレータ）を使用します。入力電圧は4.5V～16Vです。出力電圧は1.0V～5.1Vの範囲でジャンパで設定できます。DC3064Aは公称200Aの出力電流を供給します。データシートに説明されているように、特定のV_IN、V_OUTおよび熱条件では出力電流のディレーティングが必要です。DC3064A上のLTM4650A-1は、常に連続導通モードで動作します。スイッチング周波数は、抵抗でプログラミング（設定）することや、外部クロック信号に同期することができます。このボードでは、TRACKピンを使用して出力電圧の上昇/下降をプログラミングできます。出力電圧は、リモート出力電圧検出機能を使用して「VO+」と「VO–」の間で厳格にレギュレーションされます。これによって、重負荷時の出力電圧レギュレーションが向上します。コンパクトな16mm × 16mm × 5.01mmのBGAパッケージに収められ、これらの機能と利便性を備えたLTM4650AEY-1は、高密度ポイント・オブ・ロード・レギュレーションの様々な用途に適しています。デモ回路DC3064Aを使用または変更する場合は、このデモ・マニュアルと併せてLTM4650A-1データシートを参照してください。