NCV8668ABPD50R2G

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The NCV8668ABPD50R2G is a high performance, low quiescent current, low dropout linear voltage regulator designed to meet the stringent performance requirements of automotive applications. It can supply up to 2A of continuous output current and is capable of providing up to 4A of peak current. The device is an ideal solution for powering automotive sub-systems in powertrain, body, and convenience applications. It offers excellent transient response and high power supply reject ratio (PSRR) for noise immunity and EMI performance.

The NCV8668ABPD50R2G is housed in a compact, thermally efficient TSOT23-5 package, making it suitable for cost-sensitive applications. The device features a low dropout voltage (VDROP) of typically 150mV and a safety margin of up to 3V above the nominal output voltage. This ensures that the device will operate reliably over the input supply and temperature range. The device contains advanced protection functions such as thermal shutdown, short-circuit protection, and overvoltage protection.

The NCV8668ABPD50R2G is designed to meet Automotive Electronics Council (AEC-Q100) reliability requirements, making it suitable for use in automotive electronics applications. The device also meets ECE Regulation 10 and Directive 2015/68/EU on the limitation of pollution originating from motor vehicles. The device is designed to operate over the –40°C to +125°C temperature range.

Application field of NCV8668ABPD50R2G:

• Automotive engine control units (ECUs)
• Electronic control units for body and convenience systems
• Infotainment systems
• Voltage supply for sensors
• PTC heater driver
• Battery management system power supply

Working principle of NCV8668ABPD50R2G:

The NCV8668ABPD50R2G is a low dropout (LOD) linear voltage regulator that works by actively comparing an internal reference voltage with the input voltage and varying the output voltage accordingly. The device is able to regulate the output voltage to within a very tight tolerance and has extremely low output noise characteristics. It is designed to maintain the output voltage within ±1.3% of the nominal voltage. The device contains protective circuitry to protect it from overvoltage and short circuit events, and has a thermal shutdown feature to protect it from excess temperature.

The device works by supplying a precise output voltage (Vout) in proportion to an input voltage (Vin) as long as the difference between Vin and Vout is greater than 150mV (VDROP). It achieves this by using a simple linear topology in which a PNP bipolar transistor is used to pass current from Vin to Vout when the input supply is greater than the output voltage.

The NCV8668ABPD50R2G is able to supply up to 4A of peak current, making it an ideal solution for powering automotive systems. The device can provide up to 2A of continuous output current and offers excellent transient response times, with a maximum slope of 5mV/µs. The device also offers excellent PSRR of up to 79dB, ensuring that noise generated in the power supply is kept away from the load.

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