LTC4261IGN#PBF

LTC4261 is a negative voltage Hot Swap™ controller. It allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped at an adjustable rate. The devices feature independently adjustable inrush current and overcurrent limits to minimize stresses on the pass transistor during start-up, input step and output short conditions. An I²C interface and onboard 10bit ADC allow monitoring of board current, voltage and fault status. A single-wire broadcast mode is available to simplify the interface by eliminating two opt isolators. It is widely used in applications such as advanced TCA systems, telecom infrastructure, -48V distributed power systems, power monitors.

• 10bit ADC monitors current and voltages
• Floating topology allows very high voltage operation
• Independently adjustable inrush and overcurrent limits
• Controlled soft-start inrush, adjustable UV/OV thresholds and hysteresis
• Sequenced power good outputs with delays, adjustable power good input timeout
• Programmable latch off or auto-retry after faults, alerts host after faults
• VIN supply current is 2mA typ at (VIN = VZ – 0.3V, IIN = 5mA, TA = 25°C)
• Integral nonlinearity is ±0.5LSB typ at (IIN = 5mA, TA = 25°C)
• Offset error is ±1.75LSB max at (IIN = 5mA, TA = 25°C)
• Operating temperature range from -40°C to 85°C, package style is 28-lead plastic SSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party