LM385BZ-2.5/NOPB

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The LM385BZ-2.5/NOPB is a precision low-voltage reference diode. It is part of a family of low-voltage precision reference diodes and is a product of the National Semiconductor Corporation. It is widely used in power management integrated circuitry (PMIC) applications. This article explains the application field and working principle of the LM385BZ-2.5/NOPB.

1. Application Field of LM385BZ-2.5/NOPB

The LM385BZ-2.5/NOPB is ideal for use in voltage regulation, monitoring, and control systems. It is often used in PMIC circuits such as portable electronics, notebooks, and digital cameras. It can also be used in precision circuits such as timers, op-amps, comparators, digital-to-analog converters (DACs), and voltage level detectors. Moreover, the LM385BZ-2.5/NOPB can be used in audio circuitry that require precise voltage references such as line drivers, headphone amplifiers, pre-amps, and mixing consoles. It is also suitable for use in process controller or any other application that requires precise voltage monitoring or control.

2. Working Principle of LM385BZ-2.5/NOPB

The LM385BZ-2.5/NOPB is a precision three-pin Zener diode that references an output voltage of 2.5V. It is a two-terminal device that consists of a Zener diode and a precision resistor in a voltage regulator module. When VIN is higher than the Zener voltage, a voltage drop appears across the variable resistor. This voltage drop causes a current to flow through the resistor, thus producing a constant voltage at the output pin. The exact output voltage depends on the values of R1 and R2 which are set at their rated values during the manufacturing process. The output voltage is also affected by the temperature coefficient which starts off at 25ppm and reduces with increasing temperature. The operating temperature range of the LM385BZ-2.5/NOPB is -40°C to +85°C.

The LM385BZ-2.5/NOPB contains an advanced protection circuit that helps protect the device from damage caused by reversed voltage, excessive input voltage, or over-temperature. It has a maximum quiescent current of 2mA and a maximum output voltage of 2.5V ±1%. It also has a maximum power dissipation of 500 mW and an ESD tolerance of up to 2kV. Moreover, the LM385BZ-2.5/NOPB features a voltage accuracy of 0.2%.

3.Conclusion

In summary, the LM385BZ-2.5/NOPB is an advanced voltage reference diode designed for precision regulating, monitoring and controlling circuitry in a wide range of applications. It has a high accuracy of 0.2%, an ESD tolerance of up to 2kV, and a maximum power dissipation of 500 mW.With its advanced protection circuit, it is reliable and highly durable.

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