The LM25116 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 using an emulated current ramp. Current mode control provides inherent line feedforward, 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 LM25116 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, thermal shutdown, frequency synchronization, cycle-by-cycle current limit and adjustable line undervoltage lockout. The device is available in a power enhanced 20-pin HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.

• Emulated Peak Current Mode
• Wide Operating Range (Up to 42 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 36 V
• Precision 1.5% Voltage Reference
• Programmable Current Limit
• Programmable Soft Start
• Programmable Line Undervoltage Lockout
• Automatic Switch to External Bias Supply
• 20-Pin HTSSOP Exposed Pad
• Thermal Shutdown

• Vin (Min) (V)
• 6
• Vin (Max) (V)
• 42
• Vout (Min) (V)
• 1.215
• Vout (Max) (V)
• 36
• Iout (Max) (A)
• 20
• Iq (Typ) (uA)
• 4600
• Switching frequency (Min) (kHz)
• 50
• Switching frequency (Max) (kHz)
• 1000
• Features
• Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Synchronous Rectification
• Regulated outputs (#)
• 1
• Number of phases
• 1
• Rating
• Catalog

LM25116的完整型号有：LM25116MH/NOPB、LM25116MHX/NOPB、LM25116MH，以下是这些产品的关键参数及官网采购报价：

LM25116MH/NOPB，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：73个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM25116MH/NOPB的批量USD价格：1.975（1000+）

LM25116MHX/NOPB，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM25116MHX/NOPB的批量USD价格：1.646（1000+）

LM25116MH，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：73个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNPB，TI官网LM25116MH的批量USD价格：2.963（1000+）

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The LM25116 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM25116 controller IC. The evaluation board provides a 5V output with a 7A current capability. The wide input voltage ranges from 7V (...)

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PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

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在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)

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Welcome to the LM5116, LM5116WG and LM25116 Quickstart Design Tool. This standalone tool assists the power supply engineer with the design of a DC/DC buck regulator based on a synchronous buck controller from this product family. As such, the user can expeditiously arrive at an optimized design to (...)