In recent years, with the development of science and technology and the improvement of communication level, smart phones have become an important tool in people's work and life. Smart phones are favored by consumers because they are easy to carry, easy to operate and powerful, and have greatly changed the way people communicate. Smart phones have complex functions and application environments, which pose great challenges to their performance.

In the power management chip solution introduced by Tuermicro, STI8070X series synchronous buck DCDC converter has the advantages of fast dynamic response, 5A high current, high efficiency, etc. I2C communication bus makes the output more accurate and controllable, ensuring the system is more stable and reliable, suitable for tablet, smart box, mobile phone, SOC core power supply and so on.

COT architecture enables fast dynamic response

STI8070X series chip adopts constant on-time control architecture, internal compensation loop design, simplified peripheral circuit, saving PCB area; Compared with the traditional fixed frequency control mode, it can achieve ultra-low ripple and ultra-fast dynamic response speed, which is better than similar products in the market, and is conducive to improving the stability of the entire power supply architecture.

The measured comparative data are as follows:

STI8070X compares the measured dynamic ripple of competing products

I2C communication, the output is more accurate and controllable

The STI8070X series adopts I2C communication, and the output voltage can be accurately controlled step by step, as low as 10mV/step, which can accurately match the voltage requirements of core Power. The full range of STI8070X almost covers the voltage range and adjustment amplitude of similar products in the market. The full range of STI8070 products has different I2C addresses and different specifications, and has been matched with the SOC of mainstream solutions in the market.

High current and high efficiency improve system performance

STI8070X operating voltage range 2.7-5.5V, the whole series has 5A high current continuous output capability, suitable for tablet, smart box, mobile phone SOC power supply, core power supply.

The STI8070X has two modes of operation, PFM/FPWM, which can be configured through the IIC. Operating in PFM mode can achieve light load and high efficiency, and can achieve good efficiency in the input range, which is better than similar products in the market, and can effectively reduce and control the overall temperature of the system. The measured efficiency curve is as follows:

Provides multiple protection functions to improve system security and reliability

STI8070 series also has perfect protection function, input overvoltage protection, overtemperature protection, surge current limit and soft start, overcurrent protection, short circuit protection, etc. At the same time, the high-precision programmable adjustment of the output voltage further improves the safety and reliability of the system.

STI8070X Typical application circuit

Product features:

• Input voltage: 2.7V ~ 5.5V

• Output current: 5A

• Operating frequency: 2.1MHz

• Support 0.25μH inductance

• The output voltage is programmable from 0.6V to 1.5V

• Light load efficient mode

• Package: WLCSP-20

China has the world's largest smart phone market, and the market demand is strong, smart phones are also developing in the direction of more intelligent and higher integration, which has higher standards for chip technology requirements, Tuoer Microelectronics will adhere to innovative technology, continue to invest in research and development, provide more chip solutions, give customers a better choice, help the rapid development of various industries.