NCV8856A中文资料Synchronous Buck Controller with adjustable output voltage. Drives dual N-channel MOSFETs. Input Supply Range 4.5 V to 38 V.数据手册ONSEMI规格书

描述 Description

The NCV8856A is an adjustable output, synchronous buck controller, which drives dual N−channel MOSFETs - ideal for highpower applications. Average current mode control is employed for very fast transient response and tight regulation over wide input voltage and output load ranges. An internal fixed 6.0 V low−dropout linear regulator (LDO) supplies charge to the switch mode power supply’s (SMPS) top and bottom gate drivers, limiting the power lost to excess gate drive. The IC is designed for operation over an input voltage range of 4.5 V to 38 V and is capable of 10 to 1 voltage conversion at 500 kHz.

特性 Features

• Average Current Mode
• Fast Transient Response and Tight Regulation.
• 0.8 V Reference Voltage
• Output adjustable down to 0.8 V.
• +/-2% Output Voltage Accuracy over temperature
• Consistent operation over temperature
• 4.5 V to 38 V Input Range
• Serves a wide range of applications. Operates through Load Dump.
• Input Undervoltage Lockout
• Reliably off when input voltage is too low for safe operation.
• Low Quiescent Current in Sleep Mode
• Extremely Low battery drain when not active.
• Internally controlled soft-start
• Reduced input surge current at startup. No output overshoot at startup.
• Programmable Switching Frequency up to 500kHz
• Increased design flexibility.
• Switching Frequency can be Synchronized up to 600kHz
• Flexibility for optimized Electromagnetic Compatibility.
• Average Output Current Limiting
• Output overload protection is independent of input and output voltage.
• Peak Output Current Limiting
• Prevents inductor saturation during overload.
• 6.0 V Low-dropout Linear Regulator Auxiliary Output
• Regulated voltage available as a low current reference voltage.
• -40 °C to 150 °C Operating Junction Temperature
• Useful for a wide variety of applications.
• Thermal Shutdown Protection
• Shuts off the converter at unsafe temperatures.

应用 Application

• Automotive Systems Requiring a High Current Power Supply.
• Pre-regulated Supply for Low-voltage SMPSs and LDOs.
• Radio and Infotainment
• Instrumentation and Clusters
• Telematics
• Body Electronics
• Navigation
• Automotive

简介

NCV8856A属于集成电路（IC）的线性稳压器控制器。由制造生产的NCV8856A稳压器 - 线性 + 开关此产品族中的产品用于构建执行 DC-DC 转换或电压调节功能的电路，采用的是开关模式和线性稳压器功能的组合。虽然具体的拓扑各不相同，但此类产品的主要目的是将开关模式技术的效率优势与线性稳压技术的低噪声特性结合在一起。