描述 Description

The LT4201 provides a compact hot-swap solution with an internalpower metal-oxide semiconductor field effect transistor (MOSFET),enabling a circuit board to be safely inserted and removed froma powered backplane. The safe operating area of the internalMOSFET is production tested and guaranteed for stresses duringhot-swap events.
During startup, the LT4201 regulates the MOSFET gate to output aconstant current to charge up the board capacitors. During normaloperation, trilevel overcurrent protection is provided by an electroniccircuit breaker, a current limit, and a fast comparator. The exposedpad of the LT4201 effectively transfers MOSFET heat to the printedcircuit board (PCB), which coupled with the low MOSFET on resistance,enables high-current applications without direct airflow.
Device behavior can be finely tuned through an extensive registerset, providing digital adjustment of multiple parameters. Boardvoltage, current, power, energy, and temperature are measured bytwo analog-to-digital converters (ADCs) and read through a 1 MHzcapable PMBus? interface. Internal electrically erasable programmableread-only memory (EEPROM) stores device configurationand provides black box recording of fault conditions.
APPLICATIONS

Data center servers Data storage systems Intelligent electronic fuseNetwork routers and switches Server fan protection 5G MIMO antenna protection

特性 Features

Enables safe circuit board insertion into live backplane Internal MOSFET with 2.9 mΩ RDSON Production tested MOSFET safe operating area Wide operating voltage range: 23 V to 65 V No input TVS needed Provides telemetry on voltage, current, power, energy, and temperature 12-bit ADC accuracy: 1% voltage, 1.5% current 1% accurate analog current sense output EEPROM for configuration and fault logging Digitally adjustable, 5% accurate electronic circuit breaker Pin-selectable startup current limitDigitally adjustable normal current limitPin or digitally adjustable timers SMBus 3.0 interface and PMBus 1.3 compliant command structure Up to 3 alert outputs for faults and warnings 6 mm × 9 mm LFCSP package