The LTC4311 is a low power I2C or SMBus bus accelerator that can achieve higher data rate and lower power consumption. Its main features include: strong pull-up current, which allows users to choose larger bus pull-up resistor values to reduce VOL, DC bus power consumption and fall times, while still meeting rise time and switching frequency requirements. The controlled slew rate regulates the rise rate of the bus to 50V/µs-100V/µs, independent of bus capacitance. With very light loads, as occurs when some or all cards are removed, no reflections occur on the bus due to the controlled slew rate.
The Linear Technology LTC4311 is a Low Power Bus Accelerator designed to increase data rates and reduce power consumption in I2C or SMBus systems. It addresses issues such as slow rise times caused by high bus capacitance and increased DC power consumption from low pull-up resistor values.
The device features slew rate controlled pull-up currents that allow for smooth, controlled transitions during rising edges. This capability enables the system to achieve switching frequencies up to 400kHz even with bus capacitances in excess of 1nF. The LTC4311 operates over a wide power supply range of 1.6V to 5.5V and is available in a tiny 2mm x 2mm DFN or SC70 package.
| Operating Power Supply Range | 1.6V to 5.5V |
|---|---|
| Package Dimensions | 2mm x 2mm x 0.75mm |
| Maximum Switching Frequency | 400kHz |
| ESD Ruggedness | +8kV HBM |
The LTC4311 bus accelerator addresses slow rise times and increased DC power consumption in I2C or SMBus systems by providing strong slew rate controlled pull-up currents.
When both bus voltages are within 400mV of the supply, the LTC4311 enters standby mode and consumes only 26uA.