LM22678QTJE-5.0/NOPB

Introduction

LM22678QTJE-5.0/NOPB is a low dropout regulator, or LDO, of a type known as a switched-mode power supply. It includes an external power factor correction (PFC) circuit and facilitates the conversion of a wide range of input voltages into a reliable, accurate and stable output voltage. This type of DC-to-DC switching regulator is an ideal choice for cost-sensitive fixed output applications and is widely used in consumer electronics and medical equipment.

Application Field

The LM22678QTJE-5.0/NOPB regulator can operate from 3V to 23V input. Its efficiency is up to 97 percent and output oscillation is minimized. The device consumes a maximum of 830 μA quiescent current, making it suitable for energy-efficient applications. It has a wide range of features including integrated soft start, adjustable and forced PWM modes, and programmable or off-mode current levels.

LM22678QTJE-5.0/NOPB is well suited for applications where a precise and stable output voltage is required and no additional external power factor correction is needed. Examples of such applications include driving low to medium power VCOM, low current LCD panel controllers, and driving TFT and AMOLED displays. It is also used to power slow bus peripherals, brushes and stepper motors, LEDs, and portable computing and communications devices.

Working Principle

LM22678QTJE-5.0/NOPB is a DC-to-DC switching regulator with synchronous rectification that ensures high-efficiency operation and low output noise. It includes integrated MOSFETs and operates in either pulse-width modulation (PWM) mode or pulse-frequency modulation (PFM) mode. The voltage mode control loop helps achieve high system stability and fast response. This gives the device exceptional load transient performance, allowing it to better handle high-inrush currents caused by capacitive loads.

The LM22678QTJE-5.0/NOPB supports two output conditions - light load and no-load. In light load conditions, the device operates in an ultra-low-power PFM mode for higher efficiency. In no-load conditions, the device automatically enters the ripple-free off mode for reduced power consumption and increased system standby time.

Conclusion

The LM22678QTJE-5.0/NOPB is a highly efficient DC-DC switch regulator that provides precise and stable output voltage with low noise and fast response time. Its integrated MOSFETs and wide input voltage range make it an ideal choice for applications where power factor correction is not necessary. Its low quiescent current allows it to be used effectively in energy-sensitive applications such as portable computing and communications devices, low power VCOMs, and low-current LCD panel controllers.