NCV2931CDR2

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PMIC - Voltage Regulators - Linear

NCV2931CDR2 application field and working principle

The NCV2931CDR2 is an advanced, low power, single-channel low dropout (LDO) linear voltage regulator which is able to supply currents up to 150mA and is available in a 3-pin SOT-23 package.

This device provides adjustable output voltages (ranging from 0.8V to 5.5V), and a rated output current up to 150mA with typically low drop-out voltage levels. It can also operate with a wide supply voltage range, ranging from 0.8V to 6.5V. Low quiescent current (typically 11μA) makes it well-suited for battery-powered systems.

Applications

• Portable and mobile appliances
• Cellular phone
• Digital still cameras
• Palmtop computers
• Personal digital assistant (PDAs)
• Cordless telephones
• Wireless local area networks (WLANs)
• Battery-powered instrumentation

Working Principle

The NCV2931CDR2 is a linear regulator, so it works by a principle called "linear regulation". This type of regulator means that the output voltage is equal to a constant reference voltage minus a voltage drop proportional to the current passing through the regulator. This makes linear regulators useful for applications which require low output voltages, since they can keep the output voltage level stable with very low power losses.

This device is made up of a p-channel MOSFET connected in series between the input and output terminals, with the gate terminal connected to an internal reference voltage source. A current source controls the gate voltage so that the voltage drop across the MOSFET is proportional to the output current. This prevents sudden drops in output voltage as the load current passes through the MOSFET.

The NCV2931CDR2 also features an overcurrent protection circuit that limits the output current to safe levels. This helps to protect the device from damage caused by excessive current in the event of a short circuit or overloading. In addition, the device also includes thermal shutdown protection to limit thermal stress from overheating.

Conclusion

In conclusion, the NCV2931CDR2 is an advanced, low power, single-channel low dropout (LDO) linear voltage regulator which is suitable for a wide range of applications and can provide adjustable output voltages ranging from 0.8V to 5.5V with up to150mA of output current.

It offers advantages such as low drop-out voltage levels, low quiescent current and adjustable output voltage, along with a wide supply voltage range and overcurrent protection. The NCV2931CDR2 is a great choice for applications such as cellular phones, digital still cameras, portable and mobile appliances, and cordless phones.

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