LDK130M18R

The LDK130M18R is a two-terminal low-dropout (LDO) linear regulator designed for a wide array of consumer, consumer-influenced, and industrial applications. Using advanced LDO technology, the LDK130M18R is able to deliver up to 18A of continuous load current at a fixed operating output voltage with an operating temperature range of -40°C to +125°C. The LDK130M18R is available in an SOT-5 package for maximum board space savings and minimum height.

The LDK130M18R is ideal for power supply applications that require a wide load range voltage regulation over a wide temperature range. It works with both positive and negative input sources and provides tight line/load regulation and low dropout/current ratio. The device also maintains high efficiency and low standby current at light load conditions, making it suitable for a wide range of applications such as battery-powered designs, automotive, consumer electronics, and telecommunications.

Working Principle

The LDK130M18R is a linear regulator that uses an internal voltage reference. The regulator achieves a stable output voltage across a wide load range and temperature range by boosting the input voltage to a higher voltage level and using a series of transistors and resistors to establish a low-impedance source of regulated voltage. The regulated voltage is then adjusted to the desired value by varying the amount of current flowing through a PWM control loop.

The LDK130M18R operates with a regulated output voltage of 4.5V-24V, with a guaranteed minimum of 14VDC at full load. The output voltage is set by connecting an external reference voltage to a dedicated connection on the device. The output voltage is adjustable via a trimming pin, allowing the user to fine-tune the output voltage to a desired setting. A feedback loop is utilized to maintain the output voltage at a constant level despite external factors, such as line or load variations.

The LDK130M18R utilizes advanced PWM control to ensure that its output voltage remains stable under a variety of environmental conditions. The device also includes an on-chip current limiter, which is capable of limiting the output current in the event of an overcurrent event. This prevents potential overstressing of the device and other components in the system.

The LDK130M18R is also equipped with both thermal and overvoltage protection circuitry to ensure that the device operates safely under a variety of conditions. Thermal protection limits the power dissipation of the regulator and overvoltage protection limits the output voltage beyond a safe level. Both of these protective mechanisms help the regulator protect itself and the system.

Conclusion

The LDK130M18R is an efficient, low-cost linear regulator designed for a wide range of applications. Its advanced LDO technology and wide input voltage range make it an ideal choice for battery-powered designs. The device also features an adjustable output voltage, PWM control, and protection circuitry to ensure stability and safety under a variety of environmental conditions. The LDK130M18R is an excellent choice for a variety of power supply designs and applications.