The high power consumption of mobile device processors is expected to improve by improving the performance of DC-DC power converters. The DC-DC power conversion chip with lower transient response, because the output voltage is not easy to fluctuate, helps the mobile device processor to operate at a stable low voltage, thereby achieving power saving. Therefore, in order to ensure the performance of the processor, DC-to-DC power converters usually need to operate under higher voltage conditions, instead of operating at the lowest possible voltage as is ideal. In view of this, in the development of the processor, the design that takes a lot of manpower to extend the precious battery life may be wasted because the drive processor is a substandard DC-to-DC power converter. The transient performance and accuracy of the power converter may have deficiencies. Through the description of this article, we can see how a DC-to-DC power converter with good built-in transient performance can achieve better power saving effect for the power management IC (PMIC). Ensure that the processor is operating normally and the voltage output power must be stable. Processor manufacturers spend a lot of time on the processor's power circuitry just to ensure that power consumption is minimized while maximizing performance. In some cases, the processor adjusts the performance to match the lowest possible power, or even uses a dynamic mechanism to adjust the core voltage based on processor power. The processor needs to have the lowest voltage to maintain the correct performance. However, under normal operating conditions, the output voltage of the DC-to-DC power converter may be affected by many factors, such as component variability, DC-to-DC power converter operation mode, and transient load. factor. This means that the output voltage of the DC-to-DC power converter usually needs to be marked with a positive/negative tolerance level to ensure proper operation of the processor, while the output voltage water criterion of the DC-to-DC power converter must be as low as possible plus the tolerance range. Internal operation. Therefore, if the processor can only maintain a specific performance under a certain voltage, then the DC-to-DC power converter must operate at a higher voltage, so that it can cope with voltage drop, lack of accuracy, and usually Influencing factors such as transient reactions that are forgotten or ignored. Therefore, if the output performance of the DC-to-DC power converter under transient load can be optimized, the processor powered by it can achieve maximum performance at the lowest power consumption. By examining the transient performance of DC-to-DC power converters built into the more advanced PMIC products, these optimized performances can save many battery life in several different modes of operation. As shown in Figure 1, an integrated power management subsystem provides a cost-effective and flexible single-chip power management solution. It is specifically designed for the needs of a range of low-power portable consumer products, but is equally applicable to any application with a multimedia processor. Existing vendors have introduced PMICs that support the operation of ARMM processors, but they also support most applications and core mobile processors for low-power multimedia applications. Figure 1 High integration PMIC system circuit diagram Integrated PMIC helps achieve low power processors The DC-to-DC power converter BuckWise technology delivers 2.5 amps (A) of output current with a programmable InstantConfig EEPROM bootloader configuration, a secure real-time clock (RTC), and an auxiliary analog-to-digital converter (ADC). The advantages of low-power 32kHz RTC crystal oscillators, I2C and DVS interfaces, in addition to being fully customizable, can result in highly efficient and scalable solutions. On the other hand, the efficiency of DC-to-DC power converters will vary depending on operating conditions. Therefore, for an effective comparison, first assume that the system power efficiency of the three test categories is 80%. The actual system efficiency will also be considered in later analysis to show how the benefits of changing the DC-to-DC power converter mode will affect the battery life of the system. As shown in Figure 2, under certain conditions, the transient response is ±6 millivolts. So theoretically, the voltage level applied to the processor will only be 6 millivolts above the required voltage. Moreover, under similar conditions, other PMICs may have a chance of exceeding ±30 millivolts. Figure 2 Transient response of DC-DC power converters 1 and 2 with high integration PMIC under specific conditions Since the power consumption of the processor is proportional to the square of the voltage, the increased power consumption can be easily estimated. This means that when using a DC-to-DC power converter with better transient performance, the battery life will increase significantly. Designers who choose to use PMICs with multiple modes of operation can optimize for different systems. Table 1 shows the transient energy measurements of DC-to-DC power converters under different operating conditions under the same conditions above. This article shows how the DC-to-DC power converter transient performance and traditional PMIC solutions are different in terms of saving power and increasing battery life. There are several DC-to-DC power converters built into one PMIC. If you look at a DC-to-DC power converter, there are advanced technologies in the market that can extend the PMIC of a traditional 30-mV transient performance. 7.5% battery life. In addition, this power savings does not require redesigning the line or adding any components, as long as the DC-to-DC power converter output voltage is minimized.
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