NCV8503PW25G

Current - Output:	400mA
Base Part Number:	NCV8503
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C
Protection Features:	Over Temperature, Reverse Polarity, Short Circuit
Control Features:	Enable, Reset
PSRR:	--
Current - Supply (Max):	45mA
Current - Quiescent (Iq):	350µA
Series:	Automotive, AEC-Q100
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	45V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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NCV8503PW25G Application Field and Working Principle

Introduction

NCV8503PW25G is a low input voltage, low quiescent current linear voltage regulator with negative output. It is designed for high power applications in single cell Li-ion and Li-polymer batteries. It is designed to meet the stringent requirements of mobile applications and integrated into a single package the voltage regulation function, high accuracy, low noise, current limit, thermal protection and reverse current protection. The NCV8503PW25G provides an adjustable output voltage from -2.5V to -3.3V with a maximum load current of 2A. The operational input voltage range is 2.5V to 5.5V and the input to output differential is 4V. The output voltage is accurate to within ±1.5% over the entire temperature range and is internally compensated for stable operation.

PMIC – Voltage Regulators – Linear

A linear voltage regulator is a type of voltage regulator that regulates voltage by employing an electronic circuit with a set of resistors and capacitors to provide a constant output voltage independent of the input voltage and load. Unlike switching regulators that use high frequency to convert input voltages to the desired output voltage, linear voltage regulators tend to be more efficient, small in size and provide a stable output voltage for a wide range of input and output voltages. The NCV8503PW25G is a monolithic integrated circuit is designed to provide a very low output dropout voltage and high output current capability. The device can provide up to 2A continuous output current and is available in 8-pin SOT-223 and miniature SO-8 packages. The device features a low quiescent current of only 10uA while operating which helps to extend battery life and reduce power loss during standby.

Application field of NCV8503PW25G

The NCV8503PW25G is ideal for a wide range of applications, including cell phones, digital cameras, PDAs, MP3 players, portable electronics, and other battery-powered applications. It is particularly well suited for applications requiring a large output current and low dropout voltage, such as over-discharge protection circuits, battery backup applications, and battery charging applications. The device is also suitable for step-down applications, providing a lower output voltage for a fixed input voltage. It is also ideal for power supply applications requiring an extended runtime from a single cell battery. The device can also be used for toggle control in both step-down and boost modes.

Working principle of NCV8503PW25G

The NCV8503PW25G consists of a reference voltage, an error amplifier, and a series pass element. The device employs a closed-loop architecture, wherein the differential voltage between the reference and the feedback is amplified and compared to an internal reference. If the differential voltage is negative, the pass element is turned on and current flows through the output and resistor to maintain the desired output voltage. In order to maintain a stable and accurate output voltage, the device features a low-bias current error amplifier, a low output impedance, and a 1% accurate reference. The output of the device is internally compensated for stability in an adjustable output voltage range. The device also features an internally set current limit that protects the device from short-circuit, thermal shutdown for protection from excessive temperature, as well as reverse current protection.

Conclusion

The NCV8503PW25G linear voltage regulator from ON Semiconductor is a great solution for applications requiring a low dropout voltage, low quiescent current, and high output current capability. The device features a low output voltage drop, an adjustable output voltage range, low quiescent current, and current limit protection. In addition, the device is internally compensated for stability and offers short-circuit, thermal, and reverse current protection. The device is suitable for a wide range of mobile applications including cell phones, PDAs, digital cameras, MP3 players, and battery-powered applications.

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