NCV891334中文资料步降稳压器，双模式，2 MHz 低 IQ数据手册ONSEMI规格书

描述 Description

The NCV891x34 is a Dual Mode regulator intended for Automotive, battery−connected applications that must operate with up to a 45 V input supply. Hybrid Low Power Mode allows the NCV891x34 to operate either as a PWM Buck Converter or as a Low Drop−Out Linear
Regulator, and the NCV891x34 is suitable for systems with Low Noise and Low Quiescent Current requirements often encountered in
automotive driver information systems. A reset (with fixed delay) and a fault pin (flagging low input voltage and high temperature warnings) simplify interfacing with a microcontroller.

Two pins are provided to synchronize switching to a clock, or to another NCV891x34. The NCV891x34 also provides several protection features expected in automotive power supply systems such as current limit, short circuit protection, and thermal shutdown. In addition, the high switching frequency produces low output voltage ripple even when using small inductor values and an all−ceramic output filter capacitor – forming a space−efficient switching regulator solution.

特性 Features

• 40 µA Iq in Light Load Condition
• 3.0 A Maximum Output Current in PWM Mode in NCV891334
• Internal N−channel Power Switch
• VIN Operating Range 3.7 V to 36 V, Withstands Load Dump to 45 V
• Logic Level Enable Pin can be Tied to Battery
• Fixed Output Voltage of 5.0 V or 3.3 V with ±2% Accuracy
• 2 MHz Free−running Switching Frequency
• Input and Output Synchronization Pins
• NCV Prefix for Automotive Requiring Site and Control Changes
• Wettable Flanks DFN (pin edge plating)
• These Devices are Pb−Free and are RoHS Compliant

应用 Application

• Safety Vision Systems
• Audio, Infotainment
• Instrumentation
• Telematics
• Automotive

简介

NCV891334属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由制造生产的NCV891334DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。