FEATURES

Wide Input Supply Range: −36 V to −80 V

Transient Rating to −100 V

Improved Transient Response

Enable Input (EN)

Programmable Current Limit

Programmable Current Slew Rate

Fault Timer to Eliminate Nuisance Trips

Open-Drain Power Good Output (PG)

8-Pin MSOP Package

APPLICATIONS

−48-V Distributed Power Systems

Redundant Negative Voltage Supplies

Central Office Switching

DESCRIPTION

The TPS2398 and TPS2399 integrated circuits

are hot swap power managers optimized for use

in nominal −48-V systems. For redundant-supply

systems, they incorporate an improved circuit

breaker response that provides rapid protection

from short circuits, while still enabling plug-ins to

tolerate large transients that can be generated by

the sudden switchover to a higher voltage supply.

They are designed for supply voltage ranges up to

−80 V, and are rated to withstand spikes to −100 V.

In conjunction with an external N-channel FET

and sense resistor, they can be used to enable live

insertion of plug-in cards and modules in powered

systems. Both devices provide load current slew

rate and peak magnitude limiting, easily

programmed by sense resistor value and a singleexternal

capacitor.