LM2678SX-3.3 Integrated Circuits (ICs)

The LM2678SX-3.3 is a monolithic stepped voltage regulator which provides a highly regulated output for a wide variety of applications. It is a high performance, low dropout, synchronous buck regulator that produces an output of 3.3V over a wide range of input voltages. The LM2678SX-3.3 is an improved version of the popular LM2678 voltage regulator.

The LM2678SX-3.3 belongs to the category of PMIC (Power Management ICs) voltage regulators that use DC-DC switching regulators. DC-DC switching regulators are efficient and accurate voltage converters. They convert a higher DC voltage to a lower DC voltage, while at the same time maintaining a high efficiency in the process. The LM2678SX-3.3 uses a synchronous buck topology which converts an input voltage over a wide range from 4.5V to 30V to an output voltage of 3.3V. The output voltage accuracy of the LM2678SX-3.3 is ±2.5% over line and load

One of the key features of the LM2678SX-3.3 is its wide range of output current: it can provide up to 3A of load current. This makes it well suited for a variety of applications that require a stable and reliable output voltage. Additionally, the LM2678SX-3.3 features a programmable output voltage, which can be set by a single external resistor. It also features a wide range of operating modes, including pulse width modulation (PWM) and pulse frequency modulation (PFM), allowing for efficient operation over a wide range of input voltages and output current.

The LM2678SX-3.3 offers excellent transient response due to its fast transient tracking. In addition, it has an excellent thermal performance and lower profile package, making it well suited for use in high density applications. Additionally, the LM2678SX-3.3 offers a unique 0.471Ω internal switch on-resistance for minimal efficiency losses under high loads.

The LM2678SX-3.3 also offers several safety features, such as an undervoltage lockout (UVLO) to prevent damage caused by a low input voltage, an overcurrent protection (OCP) to shut off excessive current, and a short circuit protection (SCP) to prevent damage caused by short circuiting. The LM2678SX-3.3 also has a thermal shutdown protection (TSD) which will turn off the device if it gets too hot.