LM5119PSQE/NOPB

The LM5119PSQE/NOPB is a dual synchronous Buck Controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current-mode control utilizing an emulated current ramp. current-mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 to 750kHz. The LM5119 drives external high-side and low-side NMOS power switches with adaptive dead-time control. User-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency.

• Easily configurable for dual outputs or interleaved single output
• Robust 3.3A Peak gate drive
• Programmable output from 0.8V
• Precision 1.5% Voltage reference
• Programmable current limit
• Hiccup mode overload protection
• Programmable soft-start
• Programmable line under-voltage lockout
• Automatic switch-over to external bias supply
• Channel2 enable logic input
• Thermal shutdown
• Green product and no Sb/Br

警告

该设备内置静电防护措施有限, 存放时引线应短接在一起, 或将设备放置在导电泡沫中, 以防止静电对MOS门造成损坏.