LTC1929CG#TRPBF

PMIC - Voltage Regulators - DC DC Switching Controllers

The LTC1929CG#TRPBF is a DC-to-DC buck controller with a unique combination of features that make it remarkably efficient and reliable. It is capable of providing an output current of up to 25A and can be operated over a wide input voltage range. The device also features an adjustable current limit, fast transient response, and an internal oscillator. It is suitable for applications such as battery-powered systems, adjustable voltage and current power supplies, and power-supply bypass circuits.

Features of the LTC1929CG#TRPBF

• Wide input voltage range from 4.5V to 20V
• Output current of up to 25 A
• Adjustable switching frequency from 100kHz to 2MHz
• Programmable current limit
• Output voltage control with external sensed resistor programmable from 0.1V to 8V
• Built-in slow-start and fast transient response
• Eliminates the need for an external MOSFET gate driver
• Internal clock oscillator
• Thermal-shutdown protection

Applications

The LTC1929CG#TRPBF can be used in a variety of applications, including:

• Battery-powered systems
• Adjustable voltage and current power supplies
• High-efficiency buck converter applications
• Power-supply bypass circuits
• Voltage tracking applications
• Soft-start circuits

Working Principle

The LTC1929CG#TRPBF operates as a DC-to-DC buck controller by controlling a power MOSFET on and off to regulate an output voltage or current. The MOSFET is switched on and off using an internal oscillator circuit with a duty cycle between 0 and 100%. By adjusting the duty cycle, the output voltage or current can be regulated. The duty cycle is also adjustable with an external sense resistor so that the output voltage or current can be accurately regulated.

The device also features an adjustable current limit and fast transient response. This ensures that the device does not exceed its maximum current or voltage rating. It also ensures that the output voltage or current remains regulated regardless of the load or input voltage. Finally, the device features an internal slow-start circuit which helps to reduce inrush current on start-up.