LTC4286 Series

High Power Positive Hot-Swap Controller with Power Monitor via PMBus

Catalog

High Power Positive Hot-Swap Controller with Power Monitor via PMBus

Part	Applications	Current - Supply	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Supplier Device Package	Number of Channels	Mounting Type	Programmable Features	Features	Type
Analog Devices LTC4286AUK#TRPBF	General Purpose	12 mA	80 V	8.5 V	125 °C	-40 °C	48-WFQFN Exposed Pad 39 Leads	48-QFN (7x7)	1	Surface Mount	Circuit Breaker Current Limit Fault Timeout OVP UVLO	Auto Retry Fault Timeout Latched Fault OVP SMBus UVLO	Hot Swap Controller
Analog Devices LTC4286AUK#PBF	General Purpose	12 mA	80 V	8.5 V	125 °C	-40 °C	48-WFQFN Exposed Pad 39 Leads	48-QFN (7x7)	1	Surface Mount	Circuit Breaker Current Limit Fault Timeout OVP UVLO	Auto Retry Fault Timeout Latched Fault OVP SMBus UVLO	Hot Swap Controller

Catalog

High Power Positive Hot-Swap Controller with Power Monitor via PMBus

Key Features

• Wide operating voltage range: 8.5 V to 80 V

• Monitors currents, voltages, and power with ADC

• Adjustable, 5% accurate current limit: 6 mV to 20 mV

• Current foldback limits MOSFET power dissipation for overstress protection

• Monitors VGSand VDSfor MOSFET health

• Peak detect registers for current, voltage, and power

• Reports input or output power

• Remote temperature sensing with programmable warning and shutdown thresholds

• ±1% accurate, 12-bit ADC for IOUT, VIN, and VOUT

• Available in 39-lead, 7 mm x 7 mm, QFN package

• Available in 48-lead, 7 mm x 7 mm, QFN package

Description

The LTC4286 is an integrated solution for hot-swap applications allowing a board to be safely inserted and removed from a live backplane. The circuit breaker timer protects against metal-oxide semiconductor field-effect transistor (MOSFET) overheating, enabling reliable protection against overstress.The SMBus 3.1 interface, PMBus command structure, and onboard analog-to-digital converter (ADC) with selectable averaging and speed allow monitoring of board current, voltage, power, temperature, and fault status.The LTC4286 has additional features to respond to input undervoltage (UV) and overvoltage (OV): interrupts the host when a fault occurs, notifies when output power is good, detects insertion of a board, and auto-reboot after a programmable delay following a host commanded turn off.APPLICATIONSHigh availability server backplane systems12 V/24 V/48 V/54 V Distributed power systemsIndustrial