描述 Description

The NCV4269A is a 5.0 V precision micropower voltage regulator with an output current capability of 150 mA. The output voltage is accurate within ±2.0% with a maximum dropout voltage of 0.5 V at 100 mA. Low quiescent current is a feature drawing only 240 μA with a 1.0 mA load. This part is ideal for any and all battery operated microprocessor equipment. Microprocessor control logic includes an active reset output RO with delay and a SI/SO monitor which can be used to provide an early warning signal to the microprocessor of a potential impending reset signal. The use of the SI/SO monitor allows the microprocessor to finish any signal processing before the reset shuts the microprocessor down. The active Reset circuit operates correctly at an output voltage as low as 1.0 V. The Reset function is activated during the power up sequence or during normal operation if the output voltage drops outside the regulation limits. The reset threshold voltage can be decreased by the connection of an external resistor divider to the RADJ lead. The regulator is protected against reverse battery, short circuit, and thermal overload conditions. The device can withstand load dump transients making it suitable for use in automotive environments. The device has also been optimized for EMC conditions.

特性 Features

? 5.0V and 3.3V +/- 2% Output with 150mA Output Current Capability
? Tight Regulation Limits
? Active Reset Output Low Down to VQ=1.0V; Adjustable Reset Threshold
? Microprocessor power management feature, design flexibility
? Fault Protection:-40V Reverse Voltage ProtectionShort Circuit ProtectionThermal overload protection
? No external components required to enable protections required within any automotive applications.
? Early Warning through SI/SO Leads, adjustable threshold via external resistor
? Microprocessor power management feature: warns microprocessor of impending reset event or can also be used as a general purpose comparator.
? AEC Q100 Qualified
? Meets automotive quality requirements
? Very Low Dropout Voltage
? Integrated Pullup Resistor at Logic Outputs (To Use External Resistors, Select the NCV4279A)

應(yīng)用 Application

? Body and Chassis
? Powertrain
? Infotainment
? Automotive

簡介

NCV4269A屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的NCV4269A穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。