LTC3260EDE#PBF

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The LTC3260EDE#PBF is a 600V, 3A, 3MHz step-down DC-DC switching regulator that employs a current-mode control loop architecture. It integrates an external high-side FET and synchronous rectification to deliver a wide range of power solutions with high efficiency and low bill-of-materials cost in a very small package. It offers excellent power efficiency, a wide input voltage range, and adjustable output voltage or current limit. The device is ideal for applications such as home appliance, personal electronics, white goods, renewable energy, automotive, industrial, and many other applications.

Features

• Wide input voltage range (4.4V to 42V)
• Integrated high-side FET and synchronous rectifier
• Adjustable peak-current-mode control
• Fixed 3MHz operating frequency
• Constant topology voltage mode operation
• Ultrafast transient response
• Current limit to 400mA using the external resistor
• Soft start feature to reduce inrush current
• Programmable output voltage up to 5.5V
• Shutdown sequence controlled by SYNC pin
• Thermal protection with hysteretic behavior

Applications

• White Goods
• Home and Personal Electronics
• Major and Small Appliances
• Medical
• Renewable Energy
• Automotive/Industrial
• Battery-powered Systems

Working Principle

The LTC3260EDE#PBF has a peak-current-mode control loop with an internal reference voltage and an internal error amplifier and a Schottky diode. This architecture results in an accurate and fast response to load transients and load current changes. The integrated high-side MOSFET and synchronous rectifier, which delivers improved efficiency as compared to a discrete solution, are also ideal for applications operating in battery backup mode. In normal mode, the regulated output voltage is proportional to the internal reference voltage and the two external resistors connected to the error amplifier (RA and RB). When the SYNC pin is active, the output voltage of the device will be the voltage at that connection divided by the ratio of the resistor values.

The device implements a number of features and protections. The current limit is automatically activated when the inductor current reaches a certain threshold. Furthermore, the device provides a soft start feature to reduce the current consumption at start up. Additionally, the device provides an under voltage lockout protection and a thermal protection to protect the components against excessive junction temperature.

Conclusion

The LTC3260EDE#PBF DC-DC switching regulator is a compact and efficient solution to provide regulated outputs from a wide range of input voltages in a variety of applications. It offers excellent power efficiency, a wide input voltage range, and adjustable output voltage or current limit. The current-mode control architecture ensures accurate, fast response to load transients and load current changes, as well as protection features for under-voltage and over-temperature conditions. The integrated high-side MOSFET and synchronous rectifier facilitate increased power delivery and lower power losses, making the LTC3260EDE#PBF an ideal choice for applications requiring a low-cost and reliable DC-DC switching regulator.

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