LT3980EDE#PBF

LT3980EDE#PBF Application Field and Working Principle

The LT3980EDE#PBF is an adjustable high-efficiency, 2.5A synchronous step-down DC/DC converter designed to operate from an input voltage range of 4V to 5.5V. It features a guaranteed ±1% initial accuracy, an internal compensation network and ±0.5%, 0.8V reference voltage. The device is also capable of delivering up to 1.3A for load currents of up to 10A, and it provides fast transient response, making it suitable for a wide range of applications, including energy harvesting, automotive, consumer electronics, and digital signal processing (DSP).

The converter is based on a synchronous buck topology, which requires two independent pulse-width-modulation (PWM) control loops. These two PWM loops control the two main power switches: a high-side switch, responsible for connecting the input voltage (VIN) to an inductor, and a low-side switch, responsible for connecting the output voltage (VOUT) to the inductor. The PWM-controlled high-side switch also supplies current to the low-side switch. When the output voltage (VOUT) is lower than the reference voltage (VREF), the high-side switch is turned ON first and then, after a certain delay time, the low-side switch is turned ON. This allows current to flow from the input voltage (VIN) to the output (VOUT), thereby delivering power to the load. Similarly, when the output voltage (VOUT) is higher than the reference voltage (VREF), the low-side switch is turned ON first and then, after a certain delay time, the high-side switch is turned ON. This allows current to flow from the output voltage (VOUT) to the ground, thereby delivering power to the load.

The LT3980EDE#PBF is an ideal solution for applications that require low-noise and high efficiency, such as those in energy harvesting, automotive, consumer electronics, and digital signal processing (DSP). Its features include high efficiency, low noise, adjustable output voltage, and an internal compensation network. Additionally, its fast transient response, ±0.5%, 0.8V reference voltage, and ±1% initial accuracy makes it suitable for a wide range of applications.