LTC1643ALCGN#TRPBF

The LTC1643ALCGN#TRPBF is a Hot Swap controller IC from Analog Devices, enabling safe insertion and removal of boards from live PCI-Bus slots. It controls 3.3V, 5V, and ±12V supplies, with external N-channel MOSFETs handling the 3.3V and 5V, while on-chip switches manage the ±12V. This controller features a programmable foldback current limit with an electronic circuit breaker to protect against overcurrent faults. It also includes user-programmable supply voltage power-up rates and provides Fault and Power-Good outputs.

Designed for applications such as PCI-based servers and CompactPCI compliant boards, the LTC1643ALCGN#TRPBF operates within a temperature range of 0°C to 70°C. It is available in a 16-lead SSOP package, suitable for surface mounting. The device offers features like latched fault, thermal limit, and undervoltage lockout (UVLO), with programmable current limit, fault timeout, and slew rate.

Key electrical specifications include support for 4 channels, with current capabilities of 200mA and 500mA. The controller provides a circuit breaker trip filter time of 14.6 µs and various undervoltage lockout thresholds for different supply rails. The foldback current limit voltage is typically specified at 7.5 mV or 53 mV depending on the supply and sense conditions.