LM2734YQMK/NOPB

Introduction

The LM2734YQMK/NOPB is a programmable buck regulator can deliver up to 5A output current from an input voltage of 5V to 36V and has the flexibility to operate in either forced PWM or current mode control topology. It can be used internally to implement a pulse-width modulation (PWM) control that can operate in either Continuous Conduction Mode (CCM) or Discontinuous Conduction Mode (DCM). The LM2734YQMK/NOPB is a DC/DC switching regulator with a programmable fixed operating frequency up to 1.5MHz. The external components are optimized for the short form factor and good thermal characteristics.

Application field

The LM2734YQMK/NOPB can be used in wide range of applications, such as on-board/off-board PC motherboards, notebook adapters, automotive electronics, portable equipment, server and telecom power supplies, etc. It also has the ability to convert up to 5A continuous output current and have the light load efficiency of greater than 93% while keeping its high efficiency over the full input voltage range.

Working principle

In general, the LM2734YQMK/NOPB works on the principle of converting an AC input into a regulated DC output. The output of the controller is PWM (pulse width modulated) signal, which determines the switching of devices connected to it. The LM2734YQMK/NOPB uses the internal DMOS transistors to switch the current between input and output and creates the regulated DC output. The working process follows a certain sequence in order to maintain a stable output voltage.

In the first step, the controller measures the output voltage and compares it to the regulated voltage. Depending on the difference between the two values, the controller adjusts the pulse width of the PWM signal. This signal is used to switch the connected devices and determine their operation.

The controller also employs some protection features to prevent damage during operation. This includes voltage and current overstressing, dual-mode current limiting, and over temperature shutoff.

Moreover, the controller is designed to minimize the number of external components required for the design. This helps to lower the total cost of ownership, while at the same time providing excellent efficiency and output regulation.

Conclusion

The LM2734YQMK/NOPB is a programmable buck regulator that can be used in various types of applications, such as on-board/off-board PC motherboards, notebook adapters, automotive electronics, etc. It can be used to convert up to 5A of continuous output current and provides a light load efficiency of higher than 93%. It also has protection features to protect the connected components from any damage during operation. All in all, the LM2734YQMK/NOPB is an excellent choice for DC/DC switching regulator applications.