LD39080DT18-R

LD39080DT18-R Application Field and Working Principle

The LD39080DT18-R, a 2-channel low dropout voltage regulator (LDO), falls into the category of PMIC, Voltage Regulators, Linear. The extremely low quiescent current LDOs enable a design to operate typically at 2.3µA, when the two-channel is taken into account. Recently, these LDOs are typically deployed for device and power management, post regulators or protection regulators, or in applications like high precision portable equipment, surveillance systems, or camera module drivers.

Overall, the LD39080DT18-R has the capacity to deliver low voltage output up to 0.8V, high accuracy output voltage, stable voltage with low quiescent current and low output variation with line and load, high ripple rejection ratio and high output-current of 500mA.

Furthermore, the LD39080DT18-R also works with no signal noise by a Noise-Less Circuit that restricts the signal noise being generated in high frequency noise band. This helps to improve the switching performance of the load circuitry, and give it a speedy response. Additionally, the EMI filters can minimize the infrared radiation noise with the low frequency noise band.

Working Principle

The LD39080DT18-R features an internal PNP power transistor and an external N-channel MOSFET for its two-channel design. This channel is also equipped with an internal voltage reference, feedback resistor, error amplifier, and discharge-control circuit. All of these components, alongside the external input/output capacitor, form the two-channel operating principle.

In turn, the input voltage is regulated from the input section by a MOSFET, while the output voltage is regulated by a PNP transistor. The voltage set by the internal voltage reference is connected to the output section. This voltage is compared to the voltage of the output capacitor in the feedback control section, and the difference between them is amplified in the error amplifier section. This output is sent to the PNP transistor as a signal that determines whether to accelerate or decrease the output voltage.

In conclusion, LD39080DT18-R is an extremely efficient product which delivering a stable, low voltage output with an extremely low quiescent current and low output variation with line and load. This makes the LD39080DT18-R well suited for device and power management, post regulators or protection regulators, and various applications like high precision portable equipment, surveillance systems, or camera module drivers.