FEATURES

Wide Input Supply Range: −20 V to −80 V

Transient Rating to −100 V

Programmable Current Limit

Programmable Current Slew Rate

Programmable UV/OV Thresholds/Hysteresis

Debounced Insertion Detection Inputs

Open-Drain Power Good (PG) Output

Fault Timer to Eliminate Nuisance Trips

Open-Drain Fault Output (FAULT)

Enable Input (EN)

14-Pin TSSOP package

44-Pin TSSOP Package for

Creapage/Clearance

APPLICATIONS

−48-V Distributed Power Systems

Central Office Switching

Wireless Base Station

DESCRIPTION

The TPS2392 and TPS2393 integrated circuits are hot

swap power managers optimized for use in nominal

−48-V systems. They operate with supply voltage

ranges from −20-V 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. Each device provides load current

slew rate control and peak magnitude limiting.

Undervoltage and overvoltage shutdown thresholds

are easily programmed via a three-resistor divider

network. In addition, two active-low, debounced inputs

provide plug-in insertion detection. A power good (PG)

output enables downstream converters. The TPS2392

and TPS2393 also provide the basic hot swap functions

of electrical isolation of faulty cards, filtered protection

against nuisance overcurrent trips, and single-line fault

reporting. The 44-pin part supports designs where

telecomm creepage and clearance requirements must

be followed.

The TPS2392 latches off in response to current faults,

while the TPS2393 periodically retries the load in the

event of a fault.