LD39020ADTPU33R Integrated Circuits (ICs)

LD39020ADTPU33R application field and working principle

The LD39020ADTPU33R is an adjustable linear voltage regulator designed for voltage regulation in general applications. The device benefit from some advantageous features, as low quiescent current and minimal droop in output voltage, making it ideal for applications in battery powered devices that require low power operations.

The LD39020ADTPU33R is a low power DC-DC linear regulator that can deliver up to 6.5A of output current. It is an adjustable voltage regulator, meaning its output voltage is adjustable with an external resistor divider connected to the adjustment pin.

LD39020ADTPU33R has a wide input voltage range of 3.5V to 18V and adjustable output voltage from 1.2V to VIN. The ratio of the resistors connected to the adjustment pin determines the output voltage. In addition, the regulator has a fast response time, allowing it to support load transients that can happen in applications typically powered by a battery source.

The device has two operating modes, one in which the quiescent current is typically 0.8 mA, for a 5V output voltage and the other in which the quiescent current is 40 mA with the maximum output current of 6.5A. This device is available in a surface-mount SO-8 package and it is rated at a junction temperature of up to +125°C.

Working Principle:

The working principle of the LD39020ADTPU33R is relatively simple. In this device, an external voltage reference is connected to the adjustment pin, allowing the output voltage to be controlled by the resistive divider. The output voltage is derived from the input voltage, minus a dropout voltage, through the pass element that is electrically dependent from the output voltage. The output voltage is set by the ratio of the resistors connected to the adjustment pin. When the output voltage rises, so will the voltage across the pass element, reducing the current running through it and causing the voltage drop to increase. This will lower the output voltage to its desired value, regulating it.

The LD39020ADTPU33R is a very useful device because of its adjustable output voltage and fast response time. This device can be used in many applications, ranging from automotive applications to portable devices.

In automotive applications, the LD39020ADTPU33R can be used to regulate voltage in systems such as car audio and video systems, vehicle-to-vehicle communication systems and even in car navigation systems. It can also be used to power lights, sensors, gauges and displays in cars. Its low quiescent current and fast response time makes it ideal for these types of applications, specially when the car is powered by a low voltage, battery powered source.

In portable devices, the LD39020ADTPU33R can be used to power cell phones, portable radios, digital cameras, and other small battery-powered electronics. In this case, its small size and low quiescent current, make it ideal for use in portable electronic devices, since power consumption is crucial in these kind of applications.

No matter the application, the LD39020ADTPU33R will be able to provide a regulated voltage, making it a very useful device in many applications.