LP3907TLX-JJ11/NOPB

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LP3907TLX-JJ11/NOPB is a highly integrated power management integrated circuit (PMIC) that combines linear voltage regulator and switched-mode power supply for powering lithium-based batteries and multiple system rails. Developed by the Texas Instruments, it provides an efficient, power-saving and space-saving solution for a wide range of applications.

Applications

The LP3907TLX-JJ11/NOPB is primarily designed to power multiple system rails and lithium-based batteries. Its flexibility also makes it suitable for many other applications. A few examples are mobile phones, portable media players, digital cameras, portable media players and some industrial products.

Features

• High-accuracy voltage regulation. The device provides up to a 0.3+/-0.05% output voltage accuracy.
• Wide programmable operating range. The device supports a wide input voltage range of 2.7V to 5.5V and output voltage from 0.8V to 4.8V.
• Efficiency optimization. The device is designed to optimize system efficiency by managing the power supply in dual mode operation, switching between a linear and a switch-mode regulation depending on the load conditions.
• Achieve high current load. TheLP3907TLX-JJ11/NOPB can deliver up to 4A, making it suitable for applications requiring a high load current.
• Small design. The device has a small size of 4.0mm x 4.0mm, occupying very little board space and allowing for efficient product design.

Working Principle

The LP3907TLX-JJ11/NOPB operates in two modes: linear and switched-mode. Under light load conditions, the device will operate in linear regulator mode, providing high accuracy and low output noise. Under heavier loads, it will operate in switch-mode, allowing it to achieve higher efficiency and higher load currents.

In linear mode, the LP3907TLX-JJ11/NOPB uses an internal oscillator, voltage reference and error amp to ensure accurate regulation of the output voltage. When load conditions exceed a certain threshold, the device switches to switch-mode operation and begins to regulate the output voltage using an internal high-side power MOSFET in a buck-mode configuration. This allows the device to deliver higher efficiency and higher current load while still maintaining output voltage accuracy.

Conclusion

The LP3907TLX-JJ11/NOPB is a highly versatile PMIC designed to provide both high-accuracy regulated output voltage and high current load capability. It is suitable for a wide range of applications, from mobile phones to portable media players, and its small size and high efficiency make it an ideal choice for any power management design.

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