L99DZ81EP

Power management integrated circuit (PMIC) is the most important electronic component in any digital application, as it is responsible for maintaining long-term system stability and performance. The L99DZ81EP is a PMIC targeting low-power applications that provide a highly integrated, power-efficient solution with advanced features. This paper will discuss the application field and working principle of the L99DZ81EP.

The L99DZ81EP is an ultra-low-power PMIC designed to provide highly-integrated, power-efficient, and reliable power management and supply solutions in many low-power applications. The L99DZ81EP provides up to 5 watts of regulated output, with up to 10 programmable DC/DC converters, up to 8 general-purpose regulators, and up to 8 low-power output (LPO) regulators. The L99DZ81EP is suitable for multiple apps such as wearables and Internet of Things (IoT) in the consumer, industrial and embedded markets. It is capable of providing power from primary and secondary batteries, USB, 5V, or dedicated power sources.

The main functions of the L99DZ81EP include: thermal protection, over-current, over-voltage and under-voltage protection. The PMIC is capable of providing power with very low power consumption. Its integrated circuit design provides a compact solution with a wide range of external programming options, making it suitable for many portable applications.

The L99DZ81EP PMIC consists of a temperature sensor, voltage control loop, frequency control circuit, power monitoring and control block, system control block and current sense amplifiers. The temperature sensor monitors the temperature in the system and uses this data to adjust the voltage, frequency and current levels, so that the power supply remains stable. The voltage control loop maintains the voltage output of each DC/DC converter within a predetermined range. The frequency control circuit adjusts the frequency of the power supply for optimal power conversion efficiency. The power monitoring and control block monitors the output power and can be configured to provide system protection based on over-current, over-voltage and under-voltage conditions.

The system control block provides system management functions such as controlling the power up sequence, providing user interface functions, and providing system-level diagnostics. The current sense amplifiers allow the system to monitor the current output of each DC/DC converter, enabling the system to make adjustments and corrections to the output as needed. The PMIC also contains several system fault detection circuits that can detect and protect the system from over-temperature, under-voltage and over-current conditions.

The L99DZ81EP PMIC is a highly integrated and reliable low-power PMIC solution. Its wide array of features and external programming capabilities make it suitable for many low-power applications. It has a low voltage threshold of 0.5V, allowing it to work effectively in portable battery-powered applications, and its temperature sensing and protection capabilities ensure reliable operation. The integrated circuit is capable of providing power with very low power consumption and provides robust system protection from over-current, over-voltage, under-voltage and thermal conditions.

In summary, the L99DZ81EP PMIC is a low-power PMIC designed to provide an ultra-low power and highly integrated power supply solution for many low-power applications. It has a wide range of external programming options and its integrated circuit design allows for a compact solution. The PMIC offers several protection mechanisms such as over-current, over-voltage, under-voltage and over-temperature protection, making it highly reliable and suitable for many portable applications.