LM5116MHX

LM5116宽范围同步降压控制器 LM5116 Wide Range Synchronous Buck Controller

Description

The LM5116 is a 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.

Features

• Emulated Peak Current Mode

• Wide Operating Range Up to 100 V

• Low IQ Shutdown < 10 µA

• Drives Standard or Logic Level MOSFETs

• Robust 3.5-A Peak Gate Drive

• Free-run or Synchronous Operation to 1 MHz

• Optional Diode Emulation Mode

• Programmable Output from 1.215 V to 80 V

• Precision 1.5% Voltage Reference

• Programmable Current Limit

• Programmable Soft-Start

• Programmable Line Undervoltage Lockout

• Automatic Switch to External Bias Supply

• HTSSOP-20 Exposed Pad

• Thermal Shutdown

• Create a Custom Design Using the LM5116 with the WEBENCH Power Designer

Applications

• Automotive Infotainment

• Industrial DC-DC Motor Drivers

• Automotive USB Adapters

• Telecom Servers