LT1790ACS6-3#TRPBF

Power management integrated circuits (PMICs) are essential components in electronic systems, heavily relied upon to efficiently regulate power and voltage levels across different devices. PMICs are broadly classified into categories such as battery charging, voltage regulation, and signal conditioning. The LT1790ACS6-3#TRPBF is part of the voltage reference family of PMICs, used to stabilize the voltage levels of various electrical components. This article examines the application field and working principles of this voltage reference PMIC.

What is the LT1790ACS6-3#TRPBF?

The LT1790ACS6-3#TRPBF is a precision, monolithic, low-dropout (LDO) voltage reference manufactured by Linear Technology. It offers outstanding accuracy, stability, low noise and excellent gain and temperature coefficients. The IC operates from a fixed input voltage that can range from 2.7V to 6.5V, and has an adjustable output voltage range of between 0.5V and 5.0V. It also features adjustable current limit protection, line transient response and thermal stability.

Applications of the LT1790ACS6-3#TRPBF

The LT1790ACS6-3#TRPBF has a wide range of applications in voltage reference solutions. It can be used in various systems, ranging from small to large custom battery-powered designs, in order to maintain precision voltage levels in order to improve overall system performance. It is also used in DC-DC converters, audio systems, analog-to-digital converters and low-noise medical equipment, including infusion systems and portable blood glucose monitoring equipment.

The device is also suitable for a range of general-purpose power supply applications, including automotive, industrial, communications, instrumentation and test & measurement systems. Additionally, the IC can be used in portable amplifiers, D/A and A/D converters as well as motor drivers, for both high-power and low-power applications.

Working Principle

The LT1790ACS6-3#TRPBF relies on linear technology’s proprietary constant gain bandwidth (CGB) architecture to provide a fixed output voltage. This architecture features a low-noise amplifier, an active voltage reference, an output amplifier and a power control loop. The device works by regulating the output voltage, depending on the feedback voltage. When the output falls below the set point, the output amplifier increases its current to force the reference voltage to increase. Similarly, if the feedback voltage goes above the set point, the output amplifier reduces its current to reduce the reference voltage.

Conclusion

The LT1790ACS6-3#TRPBF is a low-dropout voltage reference PMIC from Linear Technology. It is used in applications that require precision voltage levels, including medical equipment, audio systems and D/A, A/D converters, DC-DC converters, motor drivers, instrumentation and test & measurement, automotive and communications systems. The device relies on a constant gain bandwidth architecture to provide a fixed output voltage.