The LTM4620IV from Linear Technology is a complete dual 13A output switching mode DC/DC power supply. Included in the package are the switching controller, power FETs, inductors, and all supporting components. Operating from an input voltage range of 4.5V to 16V, the LTM4620IV supports two outputs each with an output voltage range of 0.6V to 2.5V, set by a single external resistor. Its high efficiency design delivers up to 13A continuous current for each output. Only a few input and output capacitors are needed.

Features:

• Dual 13A output current capability
• Wide input voltage range of 4.5V to 16V
• Wide output voltage range of 0.6V to 2.5V
• High efficiency up to 95%
• Only a few input and output capacitors required
• Onboard temperature diode for device temperature monitoring
• Frequency synchronization capability
• Multi-phase operation capability
• Burst Mode operation capability
• Output voltage tracking capability for supply rail sequencing

Applications:

• Point-of-load (POL) regulation
• FPGA and ASIC power supplies
• Telecom and datacom power supplies
• Industrial power supplies
• Medical power supplies

Benefits:

• The LTM4620IV is a complete DC/DC power supply solution, saving designers time and space.
• Its high efficiency design reduces power consumption and heat dissipation.
• The LTM4620IV is versatile and can be used in a wide range of applications.

How it works:

The LTM4620IV is a synchronous buck controller. It uses two power MOSFETs to switch the input voltage to the output voltage. The switching frequency is programmed by an external resistor. The LTM4620IV uses a current mode control scheme to regulate the output voltage. This control scheme provides fast transient response and good load regulation.

Design considerations:

When designing a power supply using the LTM4620IV, there are a few things to keep in mind:

• The input and output capacitors should be sized correctly to ensure good stability and performance.
• The LTM4620IV has a thermal shutdown feature to protect the device from overheating. However, it is important to design the power supply so that the LTM4620IV does not overheat during normal operation.
• The LTM4620IV is a high-frequency switching device. Therefore, it is important to layout the circuit carefully to minimize EMI.

Conclusion:

The LTM4620IV is a complete and versatile DC/DC power supply solution. It is ideal for a wide range of applications, including POL regulation, FPGA and ASIC power supplies, telecom and datacom power supplies, industrial power supplies, and medical power supplies.