This IC targets dual voltage hot swap applications across the

+2.5V to +3.3V (nominal) bias supply voltage range with a

second lower voltage rail down to less than 1V where a circuit

breaker response to an over current event is preferred.

It features a charge pump for driving external N-Channel

MOSFETs, accurate programmable circuit breaker current

thresholds and delay output undervoltage monitoring and

reporting and adjustable soft-start.

The circuit breaker current level (ICB) for each rail is set by

two external resistors, and for each rail a delay (tCB) is set by

an external capacitor on the TCB pin. After tCB has expired,

the IC then quickly pulls down the associated GATE(s)

output turning off its external FET(s).

特性 Features

? Fast Circuit Breaker Quickly Responds to Overcurrent

Fault Conditions

? Less than 1μs Response Time to Dead Short

? Programmable Circuit Breaker Level and Delay

? Two Levels of Overcurrent Detection Provide Fast

Response to Varying Fault Conditions

? Overcurrent Circuit Breaker and Fault Isolation Functions

? Adjustable Circuit Breaker Threshold as Low as 20mV

? Adjustable Voltage Ramp-up for In-Rush Protection

During Turn-On

? Rail Independent Control, Monitoring and Reporting I/O

? Dual Supply Hot Swap Power Distribution Control to <1V

? Charge Pump Allows the Use of N-Channel MOSFETs

? QFN Package:

- Compliant to JEDEC PUB95 MO-220

QFN - Quad Flat No Leads - Package Outline

- Near Chip Scale Package Footprint, Which Improves

PCB Efficiency and has a Thinner Profile

? Pb-Free (RoHS Compliant)

Applications

? Power Supply Sequencing, Distribution and Control

? Hot Swap / Electronic Circuit Breaker Circuits