LM2677SDX-ADJ/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LM2677SDX-ADJ/NOPB is a DC DC switching regulator that belongs to a category called PMIC (power management integrated circuits). This type of regulator is used to convert the input voltage from a higher DC voltage to a lower DC voltage and current level.

In applications, the LM2677SDX-ADJ/NOPB is typically used to produce energy-efficient and reliable power solution that meets the demands of the medium power designs. This device offers a high efficiency step-down converter with a wide input voltage range of 4V to 42V. It features an adjustable step-down converter function with 0.8V–40V adjustable output voltage and current sense operation up to 3A that makes it an ideal choice for consumer, industrial, as well as automotive applications.

LM2677SDX-ADJ/NOPB is also a synchronous rectification buck regulator that can achieve up to 95% efficiency over a wide load range. It is built with a current mode control and continues to provide full output power like burst mode operation that can achieve superior light load efficiency during sustained constant load regions.

It also provides adjustable switching frequency up to 2MHz, fixed frequency up to 3MHz, and a low quiescent current of only 6uA. Low noise is further assured through the use of its square-wave forced PWM mode which eliminates high-frequency oscillations.

The LM2677SDX-ADJ/NOPB also features an integrated enable pin (EN) that can enable or disable the regulator. It also features ultraviolet (UV) light protection (UVLO) which shuts down the output if the input voltage exceeds a certain level.

Other features include large external their hole offered to prevent thermal runaway, fixed oscillator synchronization capability, EMI filter, current limit and thermal shutdown capability that provides protection against overload conditions.

The device also includes Adjustable Temperature Sense pins and Adjustable Reset pins for resetting the output voltage level and sensing the temperature of the system. The Adjustable Soft-start pin allows the IC to be set to its desired duty cycle, while the Frequency Sync Pin allows for adjustable frequency synchronization.

In terms of usage, LM2677SDX-ADJ/NOPB is very easy and simple to use since it comes with extensive on-chip protection. It can be used for wide range of applications including DC-DC power supplies, such as mobile applications and point-of-load (POL) supplies. It can be used in automotive systems, digital video processing solutions, portable audio components, medical equipment, home entertainment systems, and many other consumer, industrial, and automotive applications. Other applications include motherboard/bus supplies, reverse power input converters, etc.

In terms of working principle, LM2677SDX-ADJ/NOPB is a synchronous rectification buck regulator based on two MOSFETs. The two MOSFETs are the high-side and low-side drivers. The output voltage is regulated by pulsed width modulation (PWM) control or constant frequency PWM control, depending on the configuration. PWM operates by switching the two MOSFETs on and off in order to regulate the output voltage.

The regulator is connected to the power source, a capacitor, and a load through its terminals. The alternating current from the power source is rectified by the diode and capacitor to provide a steady DC voltage. This voltage is fed through the high-side MOSFET and is switched on and off to control the voltage on the output pin. The PWM control is then used to adjust the on-time of the high-side MOSFET to regulate the output voltage.

In order to ensure efficient power conversion, an external inductor is used to guarantee that the output voltage is smoothly regulated. The negative feedback is used to adjust the output voltage as required.

In summary, LM2677SDX-ADJ/NOPB is a synchronous rectification buck regulator that provides superior performance over the conventional step down switching regulators. It features a wide input voltage range of 4V to 42V and outputs adjustable voltages between 0.8V and 28V with a current sense operation up to 3A. It also offers a high efficiency step-down converter, adjustable switching frequency up to 2MHz, low quiescent current, and adjustable reset and temperature sensing pins. All these features make the LM2677SDX-ADJ/NOPB ideal for consumer, industrial, and automotive applications.

The specific data is subject to PDF, and the above content is for reference