LTC1735CF#TRPBF

PMIC - Voltage Regulators - DC DC Switching Controllers

The LTC1735CF#TRPBF is a high-performance DC/DC switching controller with a wide range of applications. Its full-scale output voltage range is 0.8V to 5.5V and its switching frequency can be adjusted between 200kHz and 1MHz. In this article, we will discuss the LTC1735CF#TRPBF’s application field and working principle.

Applications

The LTC1735CF#TRPBF is suitable for operating from a single supply, or from a dual supply. It also offers a wide range of useful features that make it suitable for many applications. This ranges from something as simple as powering an LED display to more advanced use cases such as powering a RAM memory module or a digital logic subsystem.

In terms of power management, the LTC1735CF#TRPBF is specifically designed to provide extremely efficient and reliable power management solutions. For example, its current mode feedback network enables tight duty-cycle control with loop compensation, as well as peak current and duty cycle limiting. As such, it is ideal for applications where peak current management and dynamic load stepping are important.

Other applications include space constrained systems that require multiple regulators, as the LTC1735CF#TRPBF is equipped with a multi-phase architecture which helps to minimize the parts count and circuit board space while providing high efficiency and a low output ripple.

Working Principle

The LTC1735CF#TRPBF takes input power from a single/dual supply, and converts and regulates it to the desired output voltage. It works on the same principle as other DC/DC switching regulators, but with added features and improved performance.

The controller consists of an internal modulated oscillator, output control logic, high-side and low-side drivers, and a current-mode feedback divider with voltage error amplifier. The modulated oscillator drives the external high-side and low-side power MOSFETs to regulate the output. The output of the error amplifier is then used to adjust the oscillator frequency in order to maintain an accurate output voltage.

The feedback loop also contains an external resistor divider and comparator which are used to monitor the output voltage, shut down the regulator, and limit the output voltage against overvoltage. Additionally, the LTC1735CF#TRPBF includes power limiting and minimum on-time protection, which ensures safe operation in case of an overload condition and undervoltage circumstances.

Conclusion

The LTC1735CF#TRPBF is a high-performance DC/DC switching controller with a wide range of applications. It is designed to provide extremely efficient and reliable power management solutions with tight duty-cycle control, peak current and duty cycle limiting, multi-phase architecture, power limiting and minimum on-time protection, and more. As such, it is an ideal choice for a variety of applications where peak current management and dynamic load stepping are important.