Datasheet Linear Technology LT4250

Manufacturer	Linear Technology
Series	LT4250

Negative 48V Hot Swap Controller

Datasheets

PDF, 242 Kb, Revision: A, File uploaded: Oct 25, 2017

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Prices

Packaging

	LT4250HCN8#PBF	LT4250HCS8#PBF	LT4250HCS8#TRPBF	LT4250HIN8#PBF	LT4250HIS8#PBF	LT4250HIS8#TRPBF	LT4250LCN8#PBF	LT4250LCS8#PBF	LT4250LCS8#TRPBF	LT4250LIN8#PBF	LT4250LIS8#PBF	LT4250LIS8#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12
Package	N-8 Package Outline Drawing	SO-8 Package Outline Drawing	SO-8 Package Outline Drawing	N-8 Package Outline Drawing	SO-8 Package Outline Drawing	SO-8 Package Outline Drawing	N-8 Package Outline Drawing	SO-8 Package Outline Drawing	SO-8 Package Outline Drawing	N-8 Package Outline Drawing	SO-8 Package Outline Drawing	SO-8 Package Outline Drawing
Package Code	N	S8	S8	N	S8	S8	N	S8	S8	N	S8	S8
Package Index	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)
Pin Count	8	8	8	8	8	8	8	8	8	8	8	8

Parametrics

Parameters / Models	LT4250HCN8#PBF	LT4250HCS8#PBF	LT4250HCS8#TRPBF	LT4250HIN8#PBF	LT4250HIS8#PBF	LT4250HIS8#TRPBF	LT4250LCN8#PBF	LT4250LCS8#PBF	LT4250LCS8#TRPBF	LT4250LIN8#PBF	LT4250LIS8#PBF	LT4250LIS8#TRPBF
Active Limiting	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Circuit Breaker Accuracy, %	20	20	20	20	20	20	20	20	20	20	20	20
Circuit Breaker Threshold	50mV	50mV	50mV	50mV	50mV	50mV	50mV	50mV	50mV	50mV	50mV	50mV
Circuit Breakers	1	1	1	1	1	1	1	1	1	1	1	1
Demo Boards	DC429A	DC429A	DC429A	DC429A	DC429A	DC429A	DC429A	DC429A	DC429A	DC429A	DC429A	DC429A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no	no	no	no	no	no	no	no	no
Fault Output	no	no	no	no	no	no	no	no	no	no	no	no
Foldback	no	no	no	no	no	no	no	no	no	no	no	no
In-Rush Current	Miller Cap	Miller Cap	Miller Cap	Miller Cap	Miller Cap	Miller Cap	Miller Cap	Miller Cap	Miller Cap	Miller Cap	Miller Cap	Miller Cap
Isupply, mA	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6
OV	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85
Power Good Output	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Reset Output	no	no	no	no	no	no	no	no	no	no	no	no
Sequencing	no	no	no	no	no	no	no	no	no	no	no	no
UV	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Vin Range	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V	-18V to -80V

Eco Plan

	LT4250HCN8#PBF	LT4250HCS8#PBF	LT4250HCS8#TRPBF	LT4250HIN8#PBF	LT4250HIS8#PBF	LT4250HIS8#TRPBF	LT4250LCN8#PBF	LT4250LCS8#PBF	LT4250LCS8#TRPBF	LT4250LIN8#PBF	LT4250LIS8#PBF	LT4250LIS8#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
Monitor Network Compliant -48V Power Supplies &mdash DN290
PDF, 85 Kb, File published: Jul 2, 2002
Extract from the document
advertisement Monitor Network Compliant вЂ“48V Power Supplies
Design Note 290
Brendan Whelan
Introduction
Reliability is a top priority for the designers of
modern telephone and communication equipment.
Designers take extra care to protect circuitry from
failure-causing temperature and voltage changes,
employing redundancy whenever possible, especially
for power supplies. The power supplies are monitored
to obtain early warning of impending failure. Often
complicated circuitry that can include a voltage reference, comparators, voltage regulator and several
precision resistor dividers is used. Designers may also
use discrete components to monitor and indicate the
state of power supply fuses. The resulting circuitry
can be expensive in terms of component cost, board
space and engineering time. The LTC В®1921 replaces
the complicated monitoring circuitry with a simple
integrated precision monitoring system contained
entirely in an 8-lead MSOP package.
Features
The LTC1921 is the only integrated solution that can
monitor two independent вЂ“48V power supplies, plus …

Articles

Download
-48V Backplane Impedance Analyzer Takes the Guesswork Out of Sizing Clippers and Snubbers &mdash LT Journal
PDF, 432 Kb, File published: Mar 25, 2005
Extract from the document
DESIGN IDEAS вЂ“48V Backplane Impedance Analyzer
Takes the Guesswork Out of Sizing
by Mitchell Lee
Clippers and Snubbers
It comes as something of a surprise to
most engineers that the вЂ“48V power
distributed on a backplane exhibits
a decidedly inductive impedance.
Considering bypass capacitors are
often excluded from the backplane,
coupled with the lengthy path back
to the вЂ“48V battery or power supply
source, it seems unavoidable. The
consequences of an inductive driving point impedance are twofold: п¬Ѓrst,
for reasons entirely cosmetic, the
ringing associated with insertion and
other transient events are undesirable.
Second, input reaction to high dI/dt
conditions presents correspondingly
high input voltage surges, placing
the Hot Swap MOSFET as well as the
operation of the Hot Swap controller
at risk. To mitigate these effects a network …

Model Line

Series: LT4250 (12)

LT4250HCN8#PBF LT4250HCS8#PBF LT4250HCS8#TRPBF LT4250HIN8#PBF LT4250HIS8#PBF LT4250HIS8#TRPBF LT4250LCN8#PBF LT4250LCS8#PBF LT4250LCS8#TRPBF LT4250LIN8#PBF LT4250LIS8#PBF LT4250LIS8#TRPBF

Manufacturer's Classification

Monitor, Control and Protection > Hot Swap Controllers > High Voltage Hot Swap Controllers

EMS supplier

Slices

Microcontrollers