L6911D

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The L6911D is a single-channel current-mode non-synchronous Buck controller used for regulating the output voltage of Direct Current (DC) to Direct Current (DC) power supply systems. It is suitable for use in a wide variety of consumer, automotive and industrial applications, such as test and measurement, telecommunications and data storage. The L6911D is a member of STMicroelectronics\' ICs for Power Management, with integrated overvoltage protection, load linestep control and uncommitted high-side and low-side switches.

The L6911D is based on a current-mode control architecture with internal slope compensation, allowing stable operation over a wide range of output loading and switching frequencies. This reduces design time, minimizes external component count and increases power supply efficiency. The Device is designed to sense the output inductor current, providing excellent line and load transient characteristics without the need for additional components.

The device features both an accurate voltage reference and an uncommitted reference input stage, allowing the use of higher precision external references. It also offers programmable soft-start, overcurrent protection and additional protections including overtemperature and overvoltage protection.

The L6911D features an input supply range from 4V to 40V and an output current rating of up to 5A. It supports a standard PWM frequency range from 500kHz to 2MHz, depending on the specific application.

The L6911D has a 1.25% accuracy across temperature, and it is protected with a variety of fault monitoring and reporting functionality. It can be used with a wide range of current mode control methods, including pulse width modulation (PWM), pulse speed modulation (PSM) and near instantaneous current mode (NICM).

The L6911D is a versatile and reliable DC-DC converter and voltage regulator solution. It is available in 16-pin SO and 4mmX5mm TQFP packages. It is designed to reduce board space and system cost and improve overall system efficiency.

Its main application fields include power supplies, high-performance DC motors, car electronics, and telecommunication equipments. It is suitable for use in a wide variety of high power, low noise, low supply current and low external parts count designs. Additionally, its switching frequency can be programmed digitally, allowing flexibility and user selectable features.

The working principle of the L6911D is based on the current-mode control with internal slope compensation. This enables stable operation over a wide range of output loadings and switching frequencies. It uses an accurate voltage reference to detect the output inductor current, which provides excellent line and load transient characteristics. The device supports a variety of current mode control methods, including PWM, PSM, and NICM.

The L6911D also uses an uncommitted reference input stage, allowing the use of higher precision external references. It also offers programmable soft start, overcurrent protection and protections, overtemperature and overvoltage protection.

The L6911D is specifically designed to meet the needs of high performance, low noise and low system cost. This makes it an ideal solution for embedded power applications. In conclusion, the L6911D is one of the most reliable DC-DC converter and voltage regulator solutions available on the market.

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