MC33SB0400ES Datasheet/PDFThe MC33SB0400ES is a specialized power management IC from Freescale. It is designed to provide power management solutions for applications in the automotive and industrial markets. The IC incorporates various features to ensure safety and reliability for a wide range of applications in these markets.
Key Features
- 2-channel DC/DC buck converter with a 3MHz switching frequency
- Integrated high-voltage PMOSFETs with 0.6mΩ Rds(on)
- Shutdown supply current reduces to 3.3µA
- Programmable current-limit setting up to 3A
- Built-in overvoltage protection
- 0.5% reference precision
Applications
The MC33SB0400ES is suited for a wide range of applications including automotive subsystems and consumer electronics. Typical applications include:
- Power conversion for 12V and 5V supplies in automotive applications
- Automotive battery chargers
- Power supplies for consumer electronics and telecommunication systems
- Portable consumer electronics
Working Principle
The MC33SB0400ES is a switching regulator IC. It is based on the buck topology and can be used to regulate Step-down voltage. It works by switching a PMOSFET on and off at a predetermined frequency, resulting in a DC output voltage at the output pins. The output voltage level can be adjusted via external resistors or sensing the output voltage and feeding it back to the IC.
The IC features an internal frequency compensation network to ensure stable operation over a wide supply voltage and temperature range. The PMOSFETs included in the IC have an Rds(on) of 0.6mΩ, which helps to improve efficiency. The current limit is adjustable up to 3A and it also has a built-in overvoltage protection for additional safety.
Conclusion
The MC33SB0400ES is a specialized power management IC from Freescale. It is designed to provide power management solutions for applications in the automotive and industrial markets. It features 2-channel DC/DC buck converter with a 3MHz switching frequency, integrated high-voltage PMOSFETs with 0.6mΩ Rds(on), adjustable current-limit and built-in overvoltage protection. It is suited for a wide range of applications including automotive subsystems and consumer electronics.