Introduction

Power management chips are essential components in everyday devices, from smartphones and computers to smart home appliances and new energy vehicles. As the demand for these chips continues to grow year by year, competition in the market has become increasingly intense. In this highly competitive landscape, TOLLSEMI has emerged as a leading player, leveraging its strong R&D capabilities and extensive market reach to build a comprehensive product portfolio.

With over a decade of R&D and market expansion, TOLLSEMI has established branches and R&D centers in Hangzhou, Shenzhen, Xiamen, Guangzhou, Chengdu, and Taiwan. The company offers a diverse range of products, including power management chips, motor drivers, lithium battery management chips, signal chain components, and airflow sensor ASICs. As a testament to its innovation and technical expertise, TOLLSEMI has been recognized as a national-level "Little Giant" enterprise by the Ministry of Industry and Information Technology (MIIT) and designated as a "Shaanxi Province Intellectual Property Advantage Enterprise" by the Shaanxi Intellectual Property Bureau. Additionally, the company has been named one of the Top 100 National Hard Tech Enterprises, one of the Top 30 Xi'an Hard Tech Enterprises, and an Outstanding Advanced Manufacturing Enterprise in Xi'an High-tech Zone.

TOLLSEMI’s 2024 Application Cases

ChargerLAB recently compiled a list of teardown cases for 2024, revealing that four TOLLSEMI power management chips—TMI2282L, TMI3351, TMI3455, and TMI5700—are featured in the supply chains of renowned brands such as Anker and Nubia.

products tailored for different power requirements, including synchronous buck/boost converters, switching regulators, LDO regulators, and load switches. These solutions cater to multiple industries, including consumer electronics and security, addressing the diverse needs of manufacturers.

Synchronous Buck Converters

TOLLSEMI TMI2282L

The TOLLSEMI TMI2282L integrates a switching transistor and supports a 30V input voltage with a 2.75A output current. It features an adjustable switching frequency, built-in soft start, thermal shutdown, and 100% duty cycle operation.

Application Case:

Teardown of Neentone 27W Tesla Center Console USB Docking Station (H05D)

TOLLSEMI TMI3351

The TOLLSEMI TMI3351 is a synchronous buck converter that supports a 4-32V input voltage range and an adjustable 0.8-30V output voltage. It integrates a switching transistor and adopts peak current mode control. The chip offers adjustable cycle-by-cycle current limiting, a switching frequency range of 100KHz-1MHz, built-in soft start, line loss compensation, and comprehensive protection features.

Application Case:

Teardown of Mcdodo 70W 6-in-1 GaN Fast Charging Power Strip

TOLLSEMI TMI3455

The TOLLSEMI TMI3455 comes in a QFN3*3-20 package and is designed for applications requiring a highly adaptable buck regulator. Utilizing a current-mode control method, it ensures optimal transient performance. The output voltage can be programmed via the FB pin or adjusted through an I2C interface. It also features soft start, undervoltage lockout, cycle-by-cycle current limiting, average output current limiting, overvoltage protection (OVP), and thermal shutdown.

Application Case:

Teardown of nubia DAO 100W GaN charger

Synchronous Buck-Boost Converters

TOLLSEMI TMI5700

The TOLLSEMI TMI5700 is a synchronous buck-boost controller supporting up to 34V input voltage, delivering an output voltage range of 0.6-34V with currents exceeding 10A. It adopts a peak current control mode and supports three voltage regulation methods: PWM, FB, and I2C interface voltage adjustment. The chip includes input undervoltage and overvoltage protection, cycle-by-cycle peak current protection, output overload protection, output overvoltage protection, and thermal shutdown. Additionally, it supports input and output average current limit protection, enhancing safety in automotive applications.

Application Case:

Teardown of Anker 67W Car Charger

Summary of ChargerLAB

With over a decade of R&D and market expansion, TOLLSEMI has made significant advancements in power management chips. As seen in ChargerLAB’s 2024 application cases, TOLLSEMI’s chips—including synchronous buck converters, synchronous buck-boost converters, switching regulators, LDO regulators, and load switches—boast high efficiency and superior performance. These chips integrate multiple functions, reducing the need for external components, minimizing PCB footprint, simplifying development, and ultimately lowering manufacturing costs. This accelerates product launches and enhances the competitiveness of manufacturers.

Looking ahead, TOLLSEMI will further expand into the new energy vehicle, smart home, and wearable device markets, providing robust support for these industries. As an MIIT-certified "Little Giant" enterprise, TOLLSEMI will continue driving innovation to advance the power management chip industry.