LTC3114IFE-1#TRPBF

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The LTC3114IFE-1#TRPBF voltage regulator is a high-efficiency, low-noise, DC-DC step-down switching regulator that delivers up to 3A/4A of selectable regulated current for a variety of input and output voltages. Specifically, it is ideal for fast charging applications, supplying power to high-side transistors from a range of voltages, and handling high-frequency operation in compact, space-saving packages. As a PMIC (Power Management Integrated Circuit) voltage regulator, the LTC3114IFE-1#TRPBF belongs to the DC DC switch regulator category and has great potential applications.

Applications

The LTC3114IFE-1#TRPBF can be used in a wide variety of applications such as battery charging, wireless power and portables, set-top boxes, automotive/industrial, and portable medical devices. Other potential applications include data center power supplies, communication infrastructure, consumer electronics, LED lighting, solar/fuel cell systems, automotive, and medical/healthcare equipment.

Battery Charging Applications: Lithium-ion battery packs require a constant current/constant voltage (CC/CV) charging scheme to protect cells from overcharging and over-discharging. The LTC3114IFE-1#TRPBF provides a CC/CV charging scheme with a wide range of input voltages, which allows the user to select a charging current. The device can also be used with rechargeable NiMH, NiCd, and lead acid batteries, in addition to lithium-ion batteries.

Wireless Power and Portables: The LTC3114IFE-1#TRPBF is ideal for wireless power applications such as charging laptop PCs, tablets, and wearables. Its wide input range and low output ripple make it suitable for low-noise, efficient power supplies. The device is also small and light, making it easy to integrate in wireless power designs, and it can operate at high frequencies for improved performance in portable electronics.

Automotive/Industrial Applications: The LTC3114IFE-1#TRPBF is rated for automotive applications, with a wide input range of 8V to 36V. It is ideal for automotive and industrial systems that require a tightly regulated output voltage, such as body electronics and HVAC systems. Its fast switching frequency and low noise also make it suitable for automotive applications.

Portable Medical Devices: The LTC3114IFE-1#TRPBF is rated to meet IEC-60601 medical safety standards, making it suitable for medical applications such as medical handhelds, point-of-care testing, and vital signs monitoring. Its low-power operation and small size are ideal for battery-powered medical devices, and its low output ripple makes it suitable for sensitive medical electronics.

Working Principle

The LTC3114IFE-1#TRPBF DC-DC step-down switching regulator is based on a buck topology with synchronous rectification and a wide supply voltage range. It features an internal MOSFET switch and can operate from an input voltage of 8V to 36V. The converter provides two selectable regulated currents of 3A or 4A, depending on the selected configuration. The switching frequency for the converter is adjustable from 200kHz to 1.3MHz, allowing for a compact form factor and efficient operation.

The device features internal soft start, which reduces in-rush current, and a frequency-hopping spread spectrum feature for EMI reduction. The output voltage of the converter is set with an external resistor divider and can be adjusted between 1V and 20V. The converter also includes a power-good output, which indicates when the output voltage is within 0.3V of the programmed value.

In addition, the LTC3114IFE-1#TRPBF has an adjustable current limit, which allows the user to determine the maximum current that can be drawn from the output. The current limit is set with an external resistor and can be set up to 4A. The device also includes overvoltage, overload, and thermal overload protections to ensure safe operation.

Conclusion

The LTC3114IFE-1#TRPBF DC-DC step-down switching regulator is a high-efficiency, low-noise device with a wide range of input and output voltages. It is suitable for battery charging, wireless power, portables, set-top boxes, automotive/industrial, and portable medical device applications. Its small size, high switching frequency, low output ripple, and adjustable output voltage and current limit make it an ideal choice for these applications.

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