© Semiconductor Components Industries, LLC, 2017

August, 2017 − Rev. 0

1

Publication Order Number:

TPS2398/D

TPS2398, TPS2399

-48 V Hot Swap Controller

for Redundant Supply

Systems

The TPS2398 and TPS2399 integrated circuits are hot swap power

managers optimized for use in nominal −48 V 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

single external capacitor.

Features

Typical Applications

Figure 1. Application Diagram

RTN

TPS2398/99

EN

FLTTIME

IRAMP

GATE

ISENS

−VIN

1

2

3

4

8

7

6

5

PG

47 nF

3.9 nF

0.02

W

100

mF

100 V

33 k

W

100 k

W

VOUT+

VOUT−

−48V

RTN

−48V

IN−B

NTD6414AN

VOUT+

DC/DC

EN

VIN−

VOUT−

VIN+

−48V

IN−A

www.onsemi.com

PIN CONNECTIONS AND

MARKING DIAGRAM

−VIN

GATE

RTN

IRAMP

FLTTIME

EN

PG

1

MSOP−8

Z SUFFIX

CASE 846AD

ISENS

(Top View)

239x

= Specific Device Code

x = 8 or 9

A

= Assembly Location

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

See detailed ordering and shipping information on page 15 of

this data sheet.

ORDERING INFORMATION