Analog Devices LTM4646 | Demoboard DC2527A-B

Description

Demonstration circuit 2527A-B features the LTM®4646EY, a dual 10A or single 20A high efficiency, switch mode step-down power μModule regulator. The input voltage range is from 4.5V to 20V. With CPWR bias, input voltage can be as low as 2.375V. The output voltage range is 0.6V to 5.5V. De-rating is necessary for certain VIN, VOUT, frequency and thermal conditions. The DC2527A-B offers the TRACK/SS pin allowing the user to program output tracking or soft-start period. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper can select discontinuous conduction mode. The MODE_PLLIN A pin also allows the LTM4646 to synchronize to an external clock signal (between 300kHz and 1.3MHz). DC2527A-B has the option of choosing both internal and external compensation circuit for LTM4646. Tying the PHASMD pin to different pins generates certain phases of CLKOUT and Channel2. The LTM4646 data sheet must be read in conjunction with this demo manual prior to working onor modifying demo circuit DC2527A-B.

Features

• Dual 10A or Single 20A Output
• Wide Input Voltage Range: 4.5V to 20V
• 2.375VMIN with CPWR Bias
• Output Voltage Range: 0.6V to 5.5V
• ±1.5% Maximum Total DC Output Error
• Multiphase Current Sharing
• Differential Remote Sense Amplifier, Each Channel
• Current Mode Control/Fast Transient Response
• Up to 96% Efficiency
• Adjustable Switching Frequency (250kHz to 1.3MHz)
• Frequency Synchronization
• Overcurrent Foldback Protection
• Output Overvoltage Protection
• Internal or External Compensation
• Built-In Temperature Monitoring Diode
• SnPb or RoHS Compliant Finish
• 11.25mm × 15mm × 5.01mm BGA Package

Typical applications

• Telecom and Networking Equipment
• Point-of-Load Power Supplies
• Industrial Equipment
• Medical Equipment

More information

• Datasheet
• IC product information