LM5111-3MY

• Peak current mode simulation
• Wide operating voltage range up to 100V
• 关闭_低 I Q（
• Drive standard or logic-level MOSFETs
• Lebaix 3.5A peak gate driver
• Run freely or synchronously up to 1MHz
• Optional diode emulation mode
• Programmable output from 1.215V to 80V
• 1.5% precision voltage reference
• Programmable current limit
• Programmable soft start
• Programmable line undervoltage lockout
• Automatically switch to an external bias power supply
• TSSOP - 20EP Exposed Pad is used
• Thermal shutdown

illustrate

The LM5116 is a synchronous buck controller for a wide range of different applications from high voltage buck regulators or input power supplies. The control method is based on the current pattern, using a simulated current ramp control. Current mode control provides circuit-specific feedforward, cycle current limiting, and simplified loop compensation. The sensitivity of the pulse-width modulation circuit to reduce noise using an emulation control ramp allows for very small duty cycles necessary for reliable control in high input voltage applications. Programmable operating frequency from 50kHz to 1MHz. The LM5116 driver adaptive dead time control for high-side and low-side external NMOS power switches. User-selectable diode emulation mode allows for intermittent mode operation under light load conditions for increased efficiency. Low quiescent current shutdown disables the controller and total input current consumption is less than 10μA. Other features include a high-voltage bias regulator that automatically switches external bias for improved efficiency, thermal shutdown, frequency synchronization, cyclic current limiting, and adjustable line undervoltage lockout. The enhanced TSSOP-20 package is available in power devices with an exposed chip bonding pad to help dissipate heat.