LP3985IBL-3.3/NOPB

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The LP3985IBL-3.3/NOPB is a low dropout (LDO) linear voltage regulator in Texas Instruments’ family of Power Management Integrated Circuits (PMICs). It offers a fixed output of 3.3V and can supply up to 100mA of current. The device features a current-mode control architecture, which means it can adjust its output voltage in response to changing loads and input voltages. This makes it ideal for applications requiring high efficiency and dynamic current delivery in a small package.

Features of LP3985IBL-3.3/NOPB

• Wide input operating voltage range from 1.8 V to 5.5 V
• Low dropout voltage of 0.5 V at 100 mA
• Integrated current-mode control for improved dynamic performance and efficiency
• Reverse battery protection
• Thermal shutdown protection
• Small 8-pin LLP package

Application of LP3985IBL-3.3/NOPB

The LP3985IBL-3.3/NOPB is designed to provide a regulated 3.3V output voltage over a wide range of input voltages. Due to its low dropout voltage, small size, and high efficiency, it is suitable for many power management applications. These include powering DSPs and microcontrollers, supplying bias to high-side driver FETs, driving LEDs, and conditioning power for battery-powered systems.

Working Principle of LP3985IBL-3.3/NOPB

The LP3985IBL-3.3/NOPB features a current-mode control architecture. In this design, the output voltage is continuously monitored and adjusted by a pair of feedback pins. The error signal between the output voltage and reference voltage is fed into a comparator, which then drives a control circuit to adjust the output voltage. This architecture improves the efficiency and dynamic performance of the regulator.

The LP3985IBL-3.3/NOPB also includes over-temperature and reverse-battery protections to ensure that the regulated output is always within a safe range. The device is available in an 8-pin LLP package, which provides a small form factor for an LDO linear regulator.

Conclusion

The LP3985IBL-3.3/NOPB is a low dropout linear voltage regulator from Texas Instruments’ PMIC family. It is capable of providing a regulated output voltage of 3.3V over a wide input voltage range and is suitable for a variety of power management applications. The device features a current-mode control architecture, which provides improved efficiency and dynamic performance. It also includes other protection features such as over-temperature and reverse-battery protections. The LP3985IBL-3.3/NOPB is offered in an 8-pin LLP package.

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