CS5231-3GDPR5

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CS5231-3GDPR5 Application Field and Working Principle

CS5231-3GDPR5 is an ultra-low-cost 5 A, 8.2 V linear voltage regulator that operates with a very low temperature coefficient. It is able to achieve a high accuracy range of 4.2 volts to 4.7 volts, with less than +/- 0.1 % of variation. It has a built-in output capacitor, eliminating the need for an external one, and also features ultra-low-noise operation and low-temperature stability. With a low shutdown current of 1 μA, CS5231-3GDPR5 solutions provide improved system performance and power savings in battery-operated systems.

Application Field

CS5231-3GDPR5 is especially suitable for direct voltage regulation in LED lighting systems, portable instruments, consumer electronics, and other high-end applications requiring ultra-low-noise operation and low-temperature stability. This device is warranted to provide the precise amount of output current and the high level of temperature stability in demanding applications. Specifically, its application field includes, but is not limited to:

• Mobile devices and accessories requiring precise regulation and ultra-low noise performance.
• Charging circuits for high-capacity mobile devices.
• Battery-powered or ultra-low-power applications.
• High-end portable medical electronics.
• High-precision portable Instruments.

Working Principle

The CS5231-3GDPR5 is a linear regulator that requires only two external resistors to operate. The external components form a voltage divider network that supports precision output voltage regulation. The adjustable output voltage is as low as 4.2 V and can be as high as 4.7 V when powered with a 5 V power source. The two resistors and a capacitor at the output point form the upper and lower tolerances on the output voltage. The capacitor connected at the output point is also useful in reducing the output noise level.

The device features an on-chip output MOSFET switch that is configured as a single pole, single throw (SPST) switch. At the start-up, the switch is turned off. When the voltage across the resistor divider reaches the internally-set reference voltage, the switch is turned on, thus providing bias to the gate of the MOSFET. This allows the MOSFET to turn on and off, as needed, in order to regulate the output voltage and current at the predetermined level.

The output regulation of the CS5231-3GDPR5 is done with great accuracy. With a voltage tolerance of less than 0.1 %, there is virtually no ripple left at the output. The temperature coefficient of the device is extremely low and ensures excellent thermal performance even under extreme temperatures. The CS5231-3GDPR5 also has a low shutdown current of 1 μA that further improves the system performance in battery-operated systems.

Conclusion

The CS5231-3GDPR5 is a low-cost, low-temperature, low-noise linear voltage regulator that provides precise voltage regulation for many types of applications. It is an ideal choice for portable instruments, consumer electronics, and other high-end devices requiring ultra-low-noise operation and low-temperature stability. The internal output MOSFET switch provides excellent voltage regulation, with a voltage tolerance of less than 0.1 %. Its low shutdown current and thermal performance is ideal for battery-operated systems.

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