LM5116WG - 100V 宽输入电压同步降压控制器

LM5116WG是TI德州仪器公司的一款控制器（外部开关）产品，LM5116WG是100V 宽输入电压同步降压控制器，本站介绍了LM5116WG的封装应用图解、特点和优点、功能等，并给出了与LM5116WG相关的TI元器件型号供参考。

LM5116WG - 100V 宽输入电压同步降压控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM5116WG 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. The operating frequency is programmable from 50 kHz to 1 MHz. The LM5116WG drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current. Additional features include a high voltage bias regulator, automatic switch-over to external bias for improved efficiency, frequency synchronization, cycle by cycle current limit and adjustable line under-voltage lockout. The device is available in a CPGA-20 high temperature ceramic package with the thermal shutdown feature disabled.

产品特性

Hermetic Package for Harsh Operating Environments
Emulated Peak Current Mode
Wide Operating Range up to 100V
Low IQ Shutdown (< 10 µA)
Drives Standard or Logic Level MOSFETs
Robust 3.5A Peak Gate Drive
Free-Run or Synchronous Operation to 1 MHz
Optional Diode Emulation Mode
Programmable Output from 1.215V to 80V
Precision 1.5% Voltage Reference
Programmable Current Limit
Programmable Soft-Start
Programmable Line Under-Voltage Lockout
Automatic Switch to External Bias Supply
CPGA-20 with No Thermal Shutdown

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