NCV1117ST25T3

NCV1117ST25T3 application field and working principle

The NCV1117ST25T3 is a fixed-output low dropout voltage regulator module, providing precise constant voltage outputs with excellent line and load-regulation characteristics. It is designed for use in high-performance consumer and embedded systems to deliver precise, low-noise power-supply, point-of-load, or power-management applications. The NCV1117ST25T3 is available in a variety of fixed output-voltage configurations.

Applications

• Computer and Networking Systems
• Consumer and Industrial Electronic Products: Home Appliances, Audio/Video Equipment, Medical Systems, Test and Measurement, Battery Charging and Control, etc.
• Wireless Communications Equipment (WiFi and Bluetooth)
• Networked Point-of-Load and/or Multi-Core Systems.
• Power Distribution, Point-of-Load Requirements and UPS Applications.
• General High-Performance Power Regulation.

Working Principle

The NCV1117ST25T3 is a low drop out regulator module that utilizes a standard series pass regulator network for most applications. The module includes an input power supply, a control circuit, and a pass element, which together control the output voltage of the device. The control circuit senses a feedback voltage that is related to the output voltage via an op-amp that is connected to a voltage divider network. This feedback voltage is compared to a voltage reference and the error is amplified or reduced to control the pass element.

The control circuit also monitors the input voltage, current, and output voltage. If an overload condition is detected, the device will shut down (SCP - overtemperature). The control circuit can signal an on/off control voltage; this input is connected to an external switch, which when open will disable the module. If a fault is detected, the fault signal can be connected externally to cause the device to shut down immediately.

The NCV1117ST25T3 is constructed from a high-density power-control module, assembled with a low-resistance power-ground plane and thermal-management features. It is designed to provide a wide range of output-voltage settings and a high current output, up to 25A.

Conclusion

The NCV1117ST25T3 is a highly efficient linear voltage regulator that is designed for use in a wide range of applications. This regulator has excellent line and load regulation characteristics with low noise. It has a wide range of output-voltage settings, as well as over-temperature protection, to ensure stable and consistent operation.