LTC4215CUFD-1 Hot Swap Voltage Controller Monitor 1 Channel General Purpose 24-QFN (4x5)

LTC4215CUFD-1 Hot Swap Controller Monitor 1 Channel General Purpose 24-QFN (4x5)

Description

The LTCP4215-1/LTC4215-3 Hot SwapTM controllers allow
a board to be safely inserted and removed from a live
backplane. Using an external N-channel pass transistor,
board supply voltage and inrush current are ramped up at
an adjustable rate. An l2Cinterface and onboardADC alow
for monitoring of load current, voltage and fault status.
The device features adjustable foldback current limit and
a soft-start pin that sets the dl/dt of the inrush current.
An 12C interface may configure the part to latch off or
automatically restart after the LTC4215-1/LTC4215-3
detect a current limit fault.
The contrller has additional features to interrupt the host
when a fault has occurred, provide three general purpose
outputs, notify when output power is good, detectinsertion
of a load card, and power-up either automatically upon
insertion or wait for an I2C command to turn on.
The LTC4215-1 has a 20μs circuit breaker filter for applica-
tions thatrequire afast fault response time. The LTC4215-3
has an extended 420μs circuit breaker flter for applications
where supply transients may exceed 20μs.

FEATURES
■Allows Safe Insertion into Live Backplane
■”8-Bit ADC Monitors Current and Voltage
■I2C/SMBus Interface
■Wide Operating Voltage Range: 2.9V to 15V
■ dl/dt Controlled Soft-Start
■Circuit Breaker Timeout: 20μs (LTC4215-1) or
420μs (LTC4215-3)
■Three General Purpose Outputs
■High Side Drive for External N-channel MOSFET
■No External Gate Capacitor Required
■ Input Overvoltage/Undervoltage Protection
■Optional Latchoff or Auto-Retry After Faults
■Alerts Host After Faults
■Inrush Current Limit with Foldback
■Available in 24-Pin (4mm x 5mm) QFN
 

APPLICATIONS
■Live Board Insertion
■ Electronic Circuit Breakers
■Computers, Servers
■Platform Management

1. Hot Swap Controller: The LTC4215CUFD-1 facilitates the safe insertion and removal of circuit boards or modules

into a live system by controlling the inrush current and ensuring that the voltage levels ramp up gradually.

1. Current and Voltage Monitoring: The IC provides current and voltage monitoring capabilities, allowing for real-time

monitoring of the load current and supply voltage.

1. Overcurrent Protection: The LTC4215CUFD-1 includes overcurrent protection features, which can detect excessive

load currents and activate fault protection mechanisms to prevent damage to the system.

1. Undervoltage Protection: The IC also incorporates undervoltage protection, monitoring the input voltage and initiating

protective measures if the voltage falls below a certain threshold.

1. Fault Detection and Reporting: The LTC4215CUFD-1 can detect various fault conditions, such as overcurrent,

undervoltage, and overtemperature, and report these conditions to the system for appropriate actions.

1. I2C Interface: The IC is equipped with an I2C interface, allowing for easy communication and configuration with a

microcontroller or other I2C-compatible devices.

1. Package: The LTC4215CUFD-1 is available in a 24-lead QFN (Quad Flat No-Lead) package with dimensions

of 4mm x 5mm.