LP2989ILDX-3.0

Current - Output:	500mA
Base Part Number:	LP2989
Supplier Device Package:	8-WSON (4x4)
Package / Case:	8-WDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	60dB (1kHz)
Current - Supply (Max):	9mA
Current - Quiescent (Iq):	175µA
Series:	--
Voltage Dropout (Max):	0.65V @ 500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LP2989ILDX-3.0 Application Field and Working PrincipleLinear voltage regulator Integrated Circuit (IC) is a type of multi-function power management integrated circuit typically used in power supplies such as AC/DC adaptors, battery-backed systems and automotive applications. The LP2989ILDX-3.0 is a low power, low noise, and feature-rich linear voltage regulator IC is designed for use in a range of applications covering smart phones, tablets, industrial and automotive systems.The LP2989ILDX-3.0 allows for up to six separate regulators and provides significant board space savings compared to a conventional discrete linear regulator and voltage dropping capacitor combination. This provides a wide application range in reduced package size. Offering improved efficiency and better thermal performance, the device can be cascaded with other ICs to provide a multi-output system.The device features architecture that optimises electrical characteristics of system-level components within a single IC, so it can handle multiple power supply systems where a small physical package size and high stability are required. The device has a maximum switching frequency of 2MHz, which helps reduce external component size and cost, and it has an over temperature protection (OTP) to automatically shut down if the thermal limit is exceeded.When it comes to working principle, the LP2989ILDX-3.0 operates in a four terminal topology, with an input supply voltage, a reference voltage, an output voltage and a ground connection. The IC acts as an electronic switch with an adjustable reference voltage allowing the output voltage to be regulated. This ensures that the steady-state accuracy of the output voltage remains independent of changes in supply voltage. The device includes an error amplifier that compares the output voltage to the reference voltage, and then controls the MOSFET switch to turn ON and OFF according to the required output voltage.The other features of the LP2989ILDX-3.0 include an open loop ramp compensation circuit that allows the device to operate with higher current and faster turn ON/OFF times, a high efficient power converter for low power applications and a step-down converter for higher power applications.The LP2989ILDX-3.0 is ideal for many different applications, including smart phones, tablets, industrial and automotive systems, where low-noise and high-stability voltage regulators with wide output voltage range and low power consumption are important. It provides a significant board-space savings compared to a conventional discrete linear regulator and voltage dropping capacitor combination. The device helps reduce system level component size and cost, and it is also effective in handling multiple power supply system requirements. Additionally, its over-temperature protection feature provides users with maximum safety and reliability.

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