LTC3130IMSE#PBF

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LTC3130IMSE#PBF, classified as a PMIC - Voltage Regulator - DC DC Switching Regulator, is a high-efficiency current-mode synchronous step-down switching regulator for portable applications. It employs a constant-on-time control architecture, enabling it to automatically adjust during transition through light- to heavy-load conditions for maximum efficiency. Its wide input operating range from 2.6V to 18V and its adjustable output voltage from 0.6V to 5.5V make it suitable for low-voltage power conversion tasks.

Topology of LTC3130IMSE#PBF

The LTC3130IMSE#PBF uses a synchronous buck topology. It uses two MOSFETs in a synchronous buck configuration. One MOSFET operates at a relatively high frequency in the switching mode, while the second MOSFET is used to reduce losses and provide a smoother output current. The synchronous buck converter can achieve high efficiency with the benefit of low switching devices\' losses.

Input Considerations

The LTC3130IMSE#PBF features a wide input operating range from 2.6V to 18V, supporting a variety of input sources, such as USB, AC adapter, or battery. Its wide input range makes it suitable for applications that are powered by a wide variety of sources. The LTC3130IMSE#PBF contains a low-dropout current-mode synchronous step-down switching regulator with a wide input operating range, which enables output current cancellation for improved input ripple rejection and efficient current transfer for high-ripple input sources.

Output Considerations

The LTC3130IMSE#PBF has adjustable output voltage from 0.6V to 5.5V and offers excellent line and load regulation over a wide load range and temperature range. The output voltage range is set with external resistors, making it suitable for various voltage requirements. ESD, overvoltage protection and current-limiting are included in this device, providing the user with safer, better system power regulation performance.

Parameters of the LTC3130IMSE#PBF

The LTC3130IMSE#PBF is offered in a 1.4 mm × 1.4 mm leadless quad flat no-lead (LQFN) package which offers a high-density mounting area. The device\'s parameters include output current 1.5 A, operating temperature range of -40°C to +125°C, and switching frequency 0.8 MHz - 3.2 MHz, very suitable for most applications. Other features of the device include adjustable switching frequency, current-mode control for fast transient response, precise output voltage regulation, and soft-start with adjustable time delay. The LTC3130IMSE#PBF also provides output disconnect during shutdown and energy-saving in shutdown mode.

Applications of the LTC3130IMSE#PBF

The LTC3130IMSE#PBF is designed to meet the requirements of modern portable applications. It is applicable to a wide range of applications such as battery-powered equipment, PCs, notebooks, peripherals, 3D TVs, medical equipment, and consumer electronics. It can also be used in automotive, industrial, and communications applications.

Working Principle of the LTC3130IMSE#PBF

The working principle of the LTC3130IMSE#PBF involves a constant-on-time current-mode control architecture. The converter is driven by a fixed- frequency current-mode control loop with synchronous rectification. This topology allows for fast transient response, precise output voltage regulation, and improved efficiency over a wide operating range. It dissipates minimal power in its external components resulting in a more efficient solution.

The LTC3130IMSE#PBF incorporates cycle-by-cycle current limiting, which reduces the peak inductor current to a safe level when an overload condition occurs. This feature prevents destructive current spikes, enabling the power system to continue operation even when overloading occurs. The device also has low-quiescent current and low-noise operation, making it suitable for battery-powered applications as well.

In summary, the LTC3130IMSE#PBF is an efficient current-mode synchronous buck converter that employs a constant-on-time control architecture, making it suitable for applications from 2.6V input to 5.5V output. The device is protected against overvoltage, overtemperature, and overcurrent, making it ideal for portable applications. It is suitable for use in battery-powered equipment, PCs, notebooks, peripherals, 3D TVs, medical equipment, and consumer electronics.

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