LM22677QTJE-5.0/NOPB

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LM22677QTJE-5.0/NOPB is a high efficiency, step-down switching voltage regulator providing a maximum output of 5.0V DC from a wide input voltage range of 4.38V to 22V. The power medical IC (PMIC) is designed to be used as a general-purpose regulator for low current load applications. The device provides high efficiency and ultra-low quiescent current, while delivering excellent load regulation and low noise operation.

LM22677QTJE-5.0/NOPB operates in one of the two switching modes, pulse-width modulation (PWM) or pulse frequency modulation (PFM). In PWM mode, the device holds two separate internal loops; one for voltage regulation and the other for current limit protection. The PFM mode maintains a constant frequency as the output current increases, while diverting from pulse modulation to pulse-skipping mode under light load conditions. This brings along low quiescent current, excellent line and load regulation, along with improved efficiency.

While most switching regulators with higher frequency are prone to EMI, the switching regulator LM22677QTJE-5.0/NOPB incorporates built-in circuits that help in combating this problem. The features that make this power IC ideal for low current loads are the wide input voltage range of 4.38V to 22V, the adjustable constant current limit range of 0.1A to 2.2A, high efficiency of up to 92%, high power density, and ultra low quiescent current of 1uA.

This high-performance product has been designed for use in a wide array of applications. Its features make it suitable for powering motor drivers and RF power amplifiers. Its excellent line and load regulation make the PMIC compatible with applications such as automotive electronics, industrial process-control systems and wireless systems. The wide input voltage range of 4.38V to 22V is beneficial for use in applications requiring a single 5V supply.

LM22677QTJE-5.0/NOPB is powered up by a single power supply through a logic-level control input. The device can also be powered up by the pulse width modulation (PWM) control, which allows the DC-DC converter to operate in an asynchronous mode. With this control input, the output voltage of the regulator can be adjusted with external resistance or by a voltage control input.

The LM22677QTJE-5.0/NOPB regulator also has an integrated compensation network that provides stability, which removes the need of having an external compensation network. There is internal regulated current supplies provided by the PMIC in order to implement the operation of the internal circuitry with very low quiescent current. The device also features a thermal shut-down circuit designed to protect the components in the event of high operating temperatures.

This highly efficient switching regulator is equipped with several safety features, such as over current limit protection, short circuit protection, and over temperature protection. The circuit can also use the output voltage as a soft-start voltage that provides a gradual rise in output from the PMIC. This prevents large current and voltage surges upon start-up, protecting the components from damage.

Overall, the LM22677QTJE-5.0/NOPB is a general-purpose step-down, switching voltage regulator that provides high efficiency, ultra-low quiescent current, excellent line and load regulation, and low noise operation. It is suitable for use in low current load applications, such as motor drivers, RF power amplifiers, automotive electronics, industrial process-control systems and wireless systems. With its high efficiency, adjustable constant current limit range, small size and wide input voltage range, the LM22677QTJE-5.0/NOPB is an ideal choice for a variety of applications.

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