LT1111IS8#TRPBF Integrated Circuits (ICs)

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LT1111IS8#TRPBF DCDC Switching Regulator Application Field and Working Principle

The LT1111IS8#TRPBF DCDC switching regulator is a voltage regulator specifically designed for electronic circuit applications, especially for portable electronic device applications. This type of regulator operates with an input voltage range of 4.5 to 33.0 volts and provides an adjustable output voltage. The output voltage is adjustable between 1.25 and 30 volts. It is an efficient and compact power solution.

The LT1111IS8#TRPBF DCDC switching regulator is an ideal choice for a variety of design applications, including computer motherboards, gaming consoles, home appliances and much more. Its tiny size, flexibility and features make this regulator an ideal solution for use in space-constrained or cost-sensitive applications. The integrated input filters, high frequency switching capability and low voltage dropout further enhance its usability, making it ideal for low power designs.

Features:

• Efficiency up to 90%
• Dual PWM/PSM mode control
• Input voltage range 4.5–33V
• Adjustable output voltage from 1.25–30V
• Overvoltage and short circuit protection
• Built-in over voltage, over current and thermal protection shut down outputs
• Wide temperature range: -40-85°C

Working Principle:

The LT1111IS8#TRPBF DCDC switching regulator works on a technique called pulse width modulation (PWM). When the AC voltage is applied, the rectifying bridge rectifies it and DC voltage (Input voltage) is available at the output of the rectifier. The voltage at the input is compared with the required voltage at the output (Output voltage set or adjusted at nominal point). This is done by a comparison circuit, which senses the voltage difference of the input and output. If the output voltage is lower than the required output voltage, then the controller can increase the width of the pulses to the switch, thus increasing the output voltage. The process is done inversely when the output voltage is greater than the required one.

The duration and the width of the pulses to the switch depend on the difference between the required output voltage and the actual output voltage, which is sensed by the regulator circuit. The LT1111IS8#TRPBF DCDC switching regulator is designed with a Dual PWM/PSM(Pulse Frequency Modulation) mode control, an intelligent feature that allows the regulator to keep the output voltage stable, ensuring low noise operation.

Applications:

• High power battery charger
• Computer and gaming consoles
• Portable hand-held devices
• Audio systems
• LED Lighting
• Motherboards
• Automobile electronics
• Industrial electronics

In conclusion, the LT1111IS8#TRPBF DCDC switching regulator is a highly reliable and advanced product for electronic circuit applications. It offers a high efficiency, wide input voltage range, excellent load response and protection features. All these features make it an ideal solution for space-constrained and cost-sensitive applications.

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