Analog Devices LTM4636 | Demoboard DC2448A-B

Description

Demonstration circuit 2448A-B features a PolyPhase® design using the LTM®4636EY, a 40A high efficiency, switch mode step-down power μModule® regulator. The input voltage range is from 4.7V to 15V. When VIN < 5.5V, short PVCC to VIN with R1 = 0Ω, and set R3 = 0Ω and remove R2. The output voltage range is 0.6V to 3.3V. The DC2448A-B can deliver a nominal 120A output current. As explained in the data sheet, output current derating is necessary for certain VIN, VOUT, and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode BOARD PHOTO for noise sensitive applications or Burst Mode® operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM4636 to synchronize to an external clock signal. The phases of the three LTM4636s are 0 degrees, 120 degrees and 240 degrees. DC2448A-B has the option of choosing both internal and external compensation circuit for LTM4636. The LTM4636 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2448A-B.

Features

• Stacked Inductor Acts as Heat Sink
• Wide Input Voltage Range: 4.7V to 15V
• 0.6V to 3.3V Output Voltage Range
• ±1.3% Total DC Output Voltage Error Over Line,Load and Temperature (–40°C to 125°C)
• Differential Remote Sense Amplifier for PrecisionRegulation
• Current Mode Control/Fast Transient Response
• Frequency Synchronization
• Parallel Current Sharing (Up to 240A)
• Internal or External Compensation
• 88% Efficiency (12VIN, 1VOUT) at 40A
• Overcurrent Foldback Protection
• 16mm × 16mm × 7.07mm BGA Package

Typical applications

• Telecom Servers and Networking Equipment
• Industrial Equipment
• Medical Systems

More information

• Datasheet
• IC product information