LT1074CT7#PBF

LT1074CT7#PBF Application Field and Working Principle

The LT1074CT7#PBF (LT1074) is a low-noise, high voltage, switching regulator control IC from Linear Technology\'s DC/DC Switching Regulators platform of products. The LT1074 is available in a 7-pin, plastic DIP and it is designed to improve the performance of low noise, high voltage switching regulators. It includes multiple safety and protection features and circuit operating parameters can be optimized via external components. The LT1074 is a CMOS type switching regulator IC, rated for operation with input voltages from 4V to 26V and output voltages from 1V to 24V and peak output currents of up to 5A.

LT1074CT7#PBF Application Field

The LT1074 is a versatile, efficient, and easy-to-use linear regulator IC, which is a perfect choice for a variety of applications. It can be used in telecommunications, industrial and medical equipment, power supplies, instrumentation, and automotive systems.

• Those needing negative logic switching regulators
• Those needing high voltage, switching regulators
• Those needing memory backlighting solutions
• Those needing high-efficiency LED drivers
• Those needing high-efficiency, low noise, DC/DC converters

LT1074CT7#PBF Working Principle

The LT1074 is a high power, current-mode switching regulator whose duty cycle is controlled by an internally oscillator operating frequency. The oscillator starts with an internally ramp generating a triangle wave. During the ramp, the output voltage is regulated, and when the ramp reaches a set point, the output is then turned off. During the off-time of the oscillator, the drivers are losing control of the output. This action is then repeated during the next cycle, at a frequency as determined by the frequency pins of the IC.

The IC also has two reference outputs, the LDO and the LBI. The LDO is used to source a reference voltage to the primary side circuits and the LBI is used to source a reference voltage to the secondary-side circuits. The voltages are adjustable by the external components connected to the LDO and the LBI pins. The output voltage of the LT1074 is proportional to the reference voltage supplied to the PFM pin.

The LT1074 also has all necessary protection features, including over-current protection, under-voltage protection, short circuit protection and over-temperature protection. It also includes an enable pin which can be used to enable and disable the external power supply.

Conclusion

The LT1074CT7#PBF is a low noise and high voltage switching regulator control IC from the DC/DC Switching Regulators family of products. It has a wide range of applications, including telecommunications, industrial and medical equipment, power supplies, instrumentation, and automotive systems. The IC is designed to improve the performance of low noise, high voltage switching regulators and has several protection and safety features such as over-current protection, under-voltage protection, short circuit protection, and over-temperature protection.