LP2985IBL-3.3

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The Texas Instruments LP2985IBL-3.3 is a cost-effective, low dropout (LDO) linear regulator that is capable of sourcing up to 100mA of output current and can support a numerous range of input voltages. This regulator produces a fixed output voltage of 3.3V, making it ideal for applications needing a stable 3.3V supply. The LP2985IBL-3.3 is designed to offer high output current with superior precision over temperature and line conditions.

Application Field

The TXI LP2985IBL-3.3 has an extensive list of applications, making it a versatile component. It can be used in a variety of different projects and applications, including powering microcontrollers, FPGAs and LCDs, motor control circuits, 10/100 Ethernets, LEDs, photodiodes, and telecom systems. This component also provides stability and reliability when used in applications that require linear regulation and low noise, like sensitive communication and telecommunication systems.

The LP2985IBL-3.3 can also be used for single cell lithium-ion batteries and in automotive applications. It is capable of providing a stable 3.3V output even when the input voltage varies from very low (1.8V) to higher fluctuating voltages. This component is also capable of meeting the strict requirements of automotive grade performance, making it suitable for automotive applications as well.

Working Principle

The LP2985IBL-3.3 employs an innovative architecture that combines a low dropout (LDO) regulator and an error amplifier. This architecture allows the component to offer superior output accuracy over temperature and load variations, while maintaining low noise and power dissipation. Additionally, the component is designed to offer fast transient response, minimal output voltage ringing, and low overshoot/undershoot.

The component utilizes an advanced wide-bandwidth internal error amplifier, which is capable of driving the output voltage to its target. The error amplifier operates with a high-gain and provides excellent stability, which helps to reduce noise and output voltage ringing. Additionally, the error amplifier does not require an external compensation network, simplifying the design process.

When power is supplied to the component, it first undergoes a soft-start process, which prevents large inrush currents from flowing through the device. Then, the output voltage is adjusted until it reaches the desired output voltage level. The entire output regulation is controlled by the error amplifier and feedback loop. As the output voltage changes, the feedback loop carefully adjusts the error amplifier’s gain to maintain the output voltage in the specified range.

The LP2985IBL-3.3 has built-in overcurrent and over-temperature protection features that help to protect the component and applications in which it is used. In events of an over-temperature or overcurrent situation, the component will automatically shut down and reset itself. This helps to prevent damage to the component and the device in which it is used.

Conclusion

The LP2985IBL-3.3 is a low dropout (LDO) linear voltage regulator designed to offer superior performance and reliability in a wide range of applications. It is capable of producing a fixed output voltage of 3.3V and can source up to 100mA of current. Additionally, the component is designed to offer high output current, low noise, and exceptional accuracy over temperature and line conditions. Furthermore, the component offers overcurrent and over-temperature protection for enhanced component and system durability. The component’s combination of features makes it well-suited for a variety of applications, including use in microcontrollers, FPGAs, LEDs, 10/100 Ethernets, and telecom systems.

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