LT1303IS8#TRPBF

Voltage - Output (Min/Fixed):	1.24V
Base Part Number:	LT1303
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	155kHz
Current - Output:	750mA (Switch)
Voltage - Output (Max):	25V (Switch)
Series:	--
Voltage - Input (Max):	10V
Voltage - Input (Min):	1.8V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LT1303IS8#TRPBF DC DC Switching Regulators

DC-DC switching regulators are widely used in many engineering and commercial applications due to their strong power densities and reliable performance. The LT1303IS8#TRPBF is a three-terminal switching regulator with an internal high-frequency switching circuitry. It is specifically designed for applications that require up to 0.5A current draw and can deliver a constant output voltage with fast transient response.

Application Field

The LT1303IS8#TRPBF can be used in a wide variety of applications from cell phones, to personal digital assistants (PDAs) to embedded satellite communication products. A combination of features in the LT1303IS8#TRPBF provides high efficiency at any load current and its small footprint makes it suitable for designs that have limited board space. Its wide input voltage range allows it to meet the needs of challenging power management applications.

Features

The LT1303IS8#TRPBF DC-DC regulator series offers a number of features to meet the needs of most power management applications. They include: high efficiency and 100% duty cycle operation; low quiescent current; wide input voltage range (2.6V to 16V); output current up to 0.5A; and full protection from overvoltage and overtemperature. The regulator also includes a proprietary Instant ON-time (IOT) technology that reduces current consumption during the start-up phase, thereby increasing the overall efficiency of the system. In addition, the LT1303IS8#TRPBF comes with a temperature range of -40°C to +125°C, allowing it to be used in harsh operating environments, such as those found in automotive and industrial applications.

Working Principle

The LT1303IS8#TRPBF is a step-down regulator composed of an integrated circuit (IC) and a switching transistor. The IC and the switching transistor are connected in series, forming a buck regulator. The buck regulator is a type of power converter that converts a higher input voltage to a lower output voltage.When a voltage input is applied to the IC, it is internally rectified and regulated to a certain voltage. This voltage is then used as the control reference for the IC’s internal control circuitry. The output voltage of the IC is then connected to the gate of the switching transistor. The switching transistor works as the main switching device, and by turning its collector terminal on and off, it switches the load current to the load. As the load current increases, the transistor’s collector voltage decreases, and the current through the transistor decreases. This causes the IC’s output voltage to drop, and thus, the output voltage of the step-down regulator is also reduced. The LT1303IS8#TRPBF also uses a minimum on-time (MOT) and a maximum off-time (MOT) to limit the switching frequency of the regulator and prevent it from operating outside its safe operating range.

Conclusion

The LT1303IS8#TRPBF is a high-efficiency, three-terminal switching regulator specifically designed for applications requiring up to 0.5A current draw and can deliver a constant output voltage with fast transient response. Its wide input voltage range, low quiescent current, small footprint and high reliability make it an ideal choice for a variety of power management applications where small size and high efficiency are key factors. It also offers protection from overvoltage and overtemperature, and is designed for operation in operating environments ranging from -40°C to +125°C. By combining these features with IOT technology, the LT1303IS8#TRPBF can serve as a great solution for any power management project where efficiency and size is a factor.

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