LT8495IUF#PBF

The LT8495IUFPBF is a synchronous two-phase buck regulator controller that delivers up to 15A of continuous output current. It includes dual-voltage input ports that can be configured for separated voltage rails, allowing the device to track input voltage drops as low as VIN(LO), delivering up to 93% efficiency. The heavy duty dual-comparator architecture handles severe load transients and accommodates dynamic power system design with its fast line-open loop response.

The LT8495IUFPBF is a DC-to-DC switching voltage regulator IC, designed as a current mode, synchronous two-phase buck converter with two 5V SYNCSYNC supply ports. It has a wide operating range from 4.5V to 40 V and can deliver up to 15A output current with excellent accuracy over a wide range of temperature and input voltages. The device is housed in a 8-lead MSOP package with 0.5mm maximum package height, which is the perfect choice for space-constrained applications with high power requirements.

Application Field

The LT8495IUFPBF is specifically developed for power-hungry applications, including communications, automotive systems, and more. Because of its wide 4.5 - 40V range and its fast line-open loop response, it is an ideal choice for designs where supply voltage can vary significantly. Additionally, the LT8495IUFPBF can be used to create dual-rail power sources in automotive systems to ensure precision power delivery, without the need for a contactor.

Working Principle

The LT8495IUFPBF features two differential high-gain amplifier and a gate driver, which provides high switching efficiency and fast circuit response. The device has a real-time gain-scheduled compensation loop with low-gain, providing excellent stability and transient response for a wide range of loads and operating conditions. The device operates in current mode, and so will have a fixed frequency over the 4.5 - 40V operating range.

The synchronization mode allows multiple converters to be synced with the same CLK frequency. The CLK utilization could be up to 400KHz. The SYN/SYN sequence timing delay is also adjustable for multi-phase optimization. When the IC works under non-synchronization mode, the CLK frequency could be changed from 250KHz to 400KHz.

The LT8495IUFPBF features on-board temperature sensing and thermal protection function to prevent the device from overheating and ensure reliable operation. The device has internal UVLO (Under Voltage Lockout) and OCP (Over Current Protection) features to protect itself from damage.

The LT8495IUFPBF also includes an enable pin, allowing it to be disabled until an enable signal is asserted. This allows designers to save power when the regulator is not in use, extending battery life in portable applications.

Conclusion

The LT8495IUFPBF is a high-performance DC-to-DC buck converter controller IC with two 5V SYNCSYNC ports. It features a wide 4.5 - 40V input voltage range and up to 15A output current, making it perfect for designs with varying supply voltages and high power requirements. The device also features adjustable gain, temperature sensing, and thermal protection, making it a reliable and robust solution for automotive, communications, and other power-hungry applications.