LM5161

Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design LM5161 SNVSAE3B – MARCH 2016 – REVISED NOVEMBER 2017 LM5161 Wide Input 100-V, 1-A Synchronous Buck/Fly-Buck™ Converter 1 Features 1 Wide 4.5-V to 100-V Input Voltage Range Integrated High-Side and Low-Side Switches – No Schottky Diode Required 1-A Maximum Load Current Constant ON-Time Control – No External Loop Compensation – Fast Transient Response Selectable DCM Buck Operation at Light Load CCM Option Supports Multi-Output Fly-Buck™ No External Ripple circuit needed (at FPWM = 0) Nearly Constant Switching Frequency Frequency Adjustable Up to 1 MHz Programmable Soft-Start Time Prebias Start-Up Peak Current Limiting Protection Adjustable Input UVLO and Hysteresis ±1% Feedback Voltage Reference Thermal Shutdown Protection Create a Custom Design Using the LM5161 With the WEBENCH® Power Designer 2 Applications Industrial Programmable Logic Controller IGBT Gate Drive Bias Supply Telecom DC-DC Primary and Secondary Side Bias E-Meter Power Line Communication Low-Power (<12W), Isolated DC-DC (Fly-Buck) 3 Description The LM5161 is a 100-V, 1-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire op...