LM5116WG
- 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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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.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM5116WG Wide Range Synchronous Buck Controller 数据表 (Rev. D) | 2013-3-17 | |||
| 应用手册 | Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) | 2019-3-12 | ||||
| 应用手册 | Minimizing FET Losses For a High Input Rail Buck Converter (Rev. A) | 2013-4-23 |
设计与开发
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LM5116-5116WG-25116DESIGN-CALC — LM(2)5116/WG 快速入门组件计算器
欢迎使用 LM5116、LM5116WG 和 LM25116 快速入门设计工具。此独立工具可帮助电源工程师设计基于该产品系列中同步降压控制器的直流/直流降压稳压器。这样，用户可以快速实现优化的设计，从而满足应用要求。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| CFP (NAR) | 20 | Ultra Librarian |