LM431AIBPX

The LM431AI-BPX is a voltage reference from Linear Technology Corporation, categorized under PMIC – Voltage Reference. It belongs to a family of voltage references called Adjustable Precision Shunt Regulation. Theadjustable shunt regulators provide a precisely regulated output voltage from a simple, low-cost circuit.

The LM431AI-BPX integrated circuit voltage reference is part of a family of voltage references. The device incorporates an NPN pass transistor to provide precision current regulation. It provides an output voltage that is adjustable between -2.5V and 36V with an accuracy of ±1.5%. The device is also capable of adjusting its output voltage to compensate for temperature variations.

The LM431AI-BPX comes in a standard TO-252 package and is available in the following power ratings: 1W. It has a typical operating temperature range of -40ºC to +85ºC.

The design and operation of the LM431AI-BPX is based on a concept called NPN pass transistor current regulation. This circuit configuration provides a regulated output voltage regardless of load current or power fluctuations. The output voltage is also adjustable and is fixed at a specified level regardless of changes in input voltage.

The LM431AI-BPX consists of a monolithic four-terminal NPN bi-polar connected transistor. The output voltage is set by adjusting the current through the reference terminal. The reference terminal is usually connected to the supply voltage. The regulated output voltage is regulated at a level relative to the input voltage, typically 1/3 of the DC supply voltage.

The LM431AI-BPX also includes an adjustable temperature coefficient. The temperature coefficient is adjusted internally by an adjustable temperature compensation pin. The temperature coefficient can be set to values ranging from 0.2 mV/ºC to 0.6 mV/ºC. This ensures that the output voltage remains stable over an extended range of temperatures.

The LM431AI-BPX is ideal for applications where an adjustable voltage reference is required. These include voltage regulators, audio amplifier systems, test instrumentation, system/power monitoring, and precision data conversion systems.