NCV8502D80G

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Application Field and Working Principle of NCV8502D80G

NCV8502D80G is a voltage regulator of a PMIC (Power Management Integrated Circuit) family, designed by ON Semiconductor. It belongs to the linear voltage regulator class.

This device is specifically designed to control the power supplied to advanced next-generation microprocessors, network components, and large FPGAs. It can support core voltages as low as 0.8V with a maximum current of 80A. It is also used in low-current, low-voltage applications. Its wide input voltage range of 5V to 24V enables the device to be used in different types of applications.

Features

• Wide Input Voltage Range from 5.0V to 24V
• Output Voltage Range from 0.8V to 5.5V in 0.1V increments
• Maximum Output Current of 80A
• Compatible with 3.3V and 5V Systems
• Integrated FETs with an On-Resistance of 1 Ω
• Integrated Boot Diode
• High Power Efficiency (Typical 93%)
• Soft Start Function
• Thermal Shutdown Feature
• Diagnostic Feature for Over Current Protection (OCP) and Over Voltage Protection (OVP)

How It Works

In a linear voltage regulator, an integrated electric pass element or FET acts as a variable resistor. It converts a variable input voltage from a power supply or battery into a constant output voltage. This voltage is then supplied to the attached load. When the output voltage drops, the voltage drops across the electric pass element increases in order to make up for the difference.

In the case of NCV8502D80G, the wide input voltage range ensures that the device can be used with both 3.3V and 5V supply. Additionally, to improve power efficiency, integrated FETs with an on-resistance of 1 Ω are used. The device also offers a soft start feature, which prevents sudden large load currents from damaging the device. But this feature also has a disadvantage, as it slows down the output voltage ramp from the standby voltage levels.

The device also features a diagnostic feature for OCP and OVP. The OCP triggers when a load is connected and the voltage drops below a predetermined level. The OVP is triggered when the output voltage exceeds a specified level, which is usually set as a safety precaution.

The integrated boot diode helps in precharging the output voltage. It is also used to prevent negative transients that can occur when the supply voltage is turned off. It is also used to provide overload protection when used in combination with an over-voltage protection circuit.

The thermal shutdown feature protects the device from overheating. This feature is triggered if the internal temperature of the device exceeds a predetermined level, usually defined by the manufacturer.

Applications

NCV8502D80G can be used in many applications. Its wide input voltage range ensures that it can be used in applications that require both 3.3V and 5V supply. It can be used in networking components, FPGAs, processors, and other low-current, low-voltage applications.

Additionally, due to its high power efficiency and integrated FETs, this device can be used in applications where a high-power load must be compensated, such as in power supplies. It can also be used in automotive and industrial applications, such as in engines, motors, and other systems.

The thermal shutdown feature ensures that the device will not be damaged in case of an overload situation. This feature also helps to protect other system components and other devices connected to the device.

Conclusion

NCV8502D80G is a voltage regulator designed by ON Semiconductor. It is mainly used in applications requiring low-current, low-voltage operations, such as microprocessors, networking components, large FPGAs, etc. The wide input voltage range enables the device to be used in 3.3V and 5V systems. The integrated FETs and boot diode help to improve power efficiency and prevent negative transients. The device also features a thermal shutdown feature in case of an overload situation.

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