LM25005中文资料7V 至 42V 宽输入电压、2.5A 电流模式非同步降压稳压器数据手册TI规格书

描述 Description

The LM25005 switching regulator features all of the functions necessary to implement an efficient, high voltage buck regulator using a minimum of external components. This easy to use regulator includes a 42V, 160mΩ, N-channel MOSFET, with an output current capability of 2.5 Amps. The regulator control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line voltage 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 50kHz to 500kHz. An oscillator synchronization pin allows multiple LM25005 regulators to self-synchronize or to be synchronized to an external clock. Additional protection features include: current limit, thermal shutdown and remote shutdown capability. The device is available in a power enhanced HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.

特性 Features

• Integrated 42V, 160mΩ N-Channel MOSFET
• Ultra-Wide Input Voltage Range from 7V to 42V
• Internal Bias Regulator
• Adjustable Output Voltage from 1.225V
• 1.5% Feedback Reference Accuracy
• Current Mode Control with Emulated Inductor Current Ramp
• Single Resistor Oscillator Frequency Setting
• Oscillator Synchronization Input
• Programmable Soft-Start
• Shutdown / Standby Input
• Wide Bandwidth Error Amplifier
• Thermal Shutdown

简介

LM25005属于集成电路（IC）的DCDC开关稳压器。由TI制造生产的LM25005稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。