How about the boost converter TPS61299?

With the advancement of technology, the types and integrated functions of wearable personal electronic products are becoming increasingly rich, such as smart watches, smart bracelets, AR glasses, etc. More and more people choose to buy and use such products. In order to further improve the user experience, extending the battery life of wearable devices has become an important challenge for developers. TI's newly launched boost converter TPS61299 has an ultra-low quiescent current, which can effectively meet the wearable device's requirement for extended standby time.

The quiescent current of TPS61299 is as low as 95nA, which is at the advanced level in the industry. At the same time, the energy conversion efficiency of TPS61299 is very high. For example, under the conditions of input 2V and output 3.3V/200mA, the efficiency is as high as 94%. These characteristics can effectively extend the standby time and service life of the battery in the system, meet the design requirements of wearable personal electronic products, and thus bring a better user experience.

The input current range of TPS61299 is 0.7V to 5.5V, which meets the battery voltage range of most wearable electronic products, and the output voltage range is 1.8V to 5.5V. To meet the needs of different application scenarios, the TPS61299 series has different input current limit versions, including 5mA, 25mA, 50mA, 100mA and 1.2A. The specific material number corresponds to the input current limit value, which is subject to the datasheet description.

In addition, the new generation TPS61299 optimizes the performance of the device in terms of response speed and has a true shutdown feature. Developers can choose forced PWM mode or automatic PFM mode according to system requirements. We provide two types of packages for this boost converter, namely SOT package with a size of 1.2mm x 1.6mm and WCSP package with a size of 1.2mm x 0.8mm, which can meet the diverse needs of customers.

At present, the most common wearable products are smart watches or smart bracelets. In order to measure the wearer's blood oxygen, heart rate and other biological signals, smart watches usually have optical sensor modules for biological signal detection. The boost converter TPS61299 can be used to power such modules. Generally speaking, the biological signal detection module does not work continuously, but collects the signal once at intervals. This requires the front-end boost converter to have a lower quiescent current to reduce energy loss, and also requires a high-speed dynamic response to ensure accurate signal acquisition. TPS61299 optimizes these performances based on TPS61099, so that the new generation of products can better meet customer system design requirements.