LT6656BCS6-3#TRMPBF

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The LT6656BCS6-3#TRMPBF is commonly used in power management integrated circuits (PMICs) to provide reference voltages. Also known as voltage references, these circuits introduce stability and accuracy to voltage output, and are invaluable for applications where small differences in voltage can generate large changes. Here we look at the application and working principle of the LT6656BCS6-3#TRMPBF.

Applications

The LT6656BCS6-3#TRMPBF can be used in a variety of applications, including:

• Various field-programmable gate array (FPGA) circuits
• Sensors requiring high accuracy of low-level measurements
• High-speed logic, signal, and data processing
• Analog-to-digital signal integration
• Power supply reference circuits

In addition to its versatile application, the LT6656BCS6-3#TRMPBF is also conveniently small, making it easier to integrate into a design.

Working Principle

As a voltage reference, the LT6656BCS6-3#TRMPBF employs a band-gap voltage reference. This type of circuit produces a highly stable voltage that is independent of the temperature, power supply range, or circuit degradation. Its working principle is to measure a small temperature coefficient in the bandgap of a semiconductor material, and use this value to provide a stable voltage reference.

At its core, a band-gap voltage reference circuit consists of two transistors connected in series, forming a differential pair called a sliding-bandgap circuit. This pair is biased to operate in an active region, and one transistor is designed to have a slightly different temperature coefficient than the other.

In other words, its base-emitter voltage changes at different temperatures. The output voltage remains constant, while the voltage between the base and emitter of the other transistor moves in the opposite direction. This change is used to calculate the temperature coefficient of the circuit. The output voltage is adjusted such that the difference between the two matched transistors is zero.

In the LT6656BCS6-3#TRMPBF, the bandgap voltage reference produces a highly stable output voltage with a typical temperature coefficient of ±15 ppm/°C. This allows applications to make accurate and reliable measurements over a wide range of temperatures, ensuring long term reliability.

Conclusion

The LT6656BCS6-3#TRMPBF is a highly efficient voltage reference for PMIC applications. Its bandgap voltage reference circuit produces a highly stable voltage output with a minimum of ±15 ppm/°C temperature coefficient. This enables applications such as FPGA circuits, sensors, high-speed logic, signal, and data processing, and analog-to-digital signal integration, to make reliable voltage measurements without drift over a wide range of temperatures. Furthermore, its small size allows it to be easily integrated into a design.

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