LT8309ES5#TRMPBF Integrated Circuits (ICs)

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It is necessary to understand the application field and working principle of power supply controllers and monitors in order to effectively use them. The LT8309ES5#TRMPBF is one of the most commonly used power supply controllers. This article provides an overview of the application field and working principle of the LT8309ES5#TRMPBF.

The LT8309ES5#TRMPBF is a synchronous buck switching regulator in the PMIC (Power Management Integrated Circuit) family. Its main purpose is to provide clean, efficient, and low noise power supply for mobile, IOT, wearables, and other battery-powered devices. It integrates a step-down converter and control circuitry in a single part and has the following features:

• Internal synchronous rectifier
• 2.25MHz current mode operation
• 3A peak output current
• Input voltage range from 2.5V to 5.5V
• Output voltage range from 0.6V to 3.3V
• Output noise free and allows transient response time to 0.2μs max

The LT8309ES5#TRMPBF is capable of delivering up to 3A current to the load. The output voltage is adjustable with a voltage divider connected across its output. Its operating temperature range is -40°C to +85°C. Its typical efficiency is up to 94%. It is available in a thermally enhanced 8-lead MSOP package.

The LT8309ES5#TRMPBF is mainly used in applications requiring seamless transition between battery and external power. Additionally, it can be used in applications such as portable devices, tablets, laptops, and servers. It is an ideal solution for applications with high peak current demands, as well as applications requiring efficient operation and low noise.

The operating principle of the LT8309ES5#TRMPBF is based on the principle of pulse width modulation (PWM). PWM is a technique for producing a rectangular signal with an adjustable duty cycle. The duty cycle is the ratio of the time the signal is high (on-time) divided by the total time of the signal. To achieve the desired output voltage, the LT8309ES5#TRMPBF modulates the duty-cycle of the pulse-width signal applied to the switch. The on-time of the pulses is adjusted to control the output voltage.

The LT8309ES5#TRMPBF includes a single, high-gain error amplifier, and it also features an internal synchronous rectifier that provides excellent efficiency and reduced EMI. The internal synchronous rectifier also eliminates the need for external Schottky diodes, thus reducing the overall system costs. Additionally, the LT8309ES5#TRMPBF provides excellent transient response to a wide range of load conditions. This allows for shorter conversion cycles and better system performance.

In conclusion, the LT8309ES5#TRMPBF is a synchronous buck switching regulator which is primarily used for providing clean, efficient, low noise power supply for mobile, IOT and wearables. It has excellent efficiency, transient response, and on-time control. It is an ideal solution for applications requiring seamless transition between battery and external power and for applications with high peak current demands.

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