LT8705IUHF#PBF

LT8705IUHF#PBF: Application Field and Working Principle

LT8705IUHF#PBF is a highly efficient, synchronous, step-down DC-DC switching controller designed specifically for use in a wide range of applications, including automotive, consumer electronics, and communications. The device integrates a low RDSON MOSFET gate driver and supports both synchronous rectification and current-mode buck operation. It is suitable for both synchronous and isolated DC-DC converters.

Features

• Wide switching frequency up to 2.2MHz
• Flexible PWM frequency selection
• Integrated low RDSon gate driver
• Supports both synchronous and isolated converters
• Integrated voltage feed-forward user-programmable ramp slope
• Under Voltage Lockout (UVLO)

Application Field

LT8705IUHF#PBF is ideal for wide range of applications due to its wide switching frequency range, flexible PWM frequency selection and synchronous rectification support. The integrated low RDSon MOSFET gate driver allows the device to drive large MOSFETs making it suitable for both synchronous and isolated DC-DC converters. It is perfect for powering applications such as NetBooks, Notebooks, Tablets, LCD Automotive Displays, Network Routers and Computer Peripherals.

Working Principle

LT8705IUHF#PBF is based on a buck topology and works on a current-mode control method, which gives it greater precision and stability in wide VIN/VOUT combinations. The device’s PWM frequency and synchronous rectification support offers low EMI and allows implementation of higher switching frequencies to achieve a smaller solution size. The device supports both current-mode buck and synchronous rectification converters and features a thermal overload protection circuitry to limit die junction temperature during overload conditions.

Conclusion

LT8705IUHF#PBF is an efficient synchronous step-down DC-DC switching controller with wide application field for powering End Applications such as NetBooks, Notebooks, Tablets, LCD Automotive Displays, Network Routers and Computer Peripherals. The device is based on a buck topology and works on a current-mode control method giving it greater precision and stability in wide VIN/VOUT combinations. It features a thermal overload protection circuitry to limit die junction temperature during overload conditions.