Datasheet Linear Technology LTC1421

Manufacturer	Linear Technology
Series	LTC1421

Hot Swap Controller

Datasheets

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PDF, 337 Kb, Revision: C, File uploaded: Oct 25, 2017

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Prices

Packaging

	LTC1421CG#PBF	LTC1421CG#TRPBF	LTC1421CG-2.5#PBF	LTC1421CG-2.5#TRPBF	LTC1421CSW#PBF	LTC1421CSW#TRPBF	LTC1421CSW-2.5#PBF	LTC1421CSW-2.5#TRPBF	LTC1421IG#PBF	LTC1421IG#TRPBF	LTC1421IG-2.5#PBF	LTC1421IG-2.5#TRPBF	LTC1421ISW#PBF	LTC1421ISW#TRPBF	LTC1421ISW-2.5#PBF	LTC1421ISW-2.5#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
Package	SSOP-24 Package Outline Drawing	SSOP-24 Package Outline Drawing	SSOP-24 Package Outline Drawing	SSOP-24 Package Outline Drawing	SW-24 Package Outline Drawing	SW-24 Package Outline Drawing	SW-24 Package Outline Drawing	SW-24 Package Outline Drawing	SSOP-24 Package Outline Drawing	SSOP-24 Package Outline Drawing	SSOP-24 Package Outline Drawing	SSOP-24 Package Outline Drawing	SW-24 Package Outline Drawing	SW-24 Package Outline Drawing	SW-24 Package Outline Drawing	SW-24 Package Outline Drawing
Package Code	G	G	G	G	SW	SW	SW	SW	G	G	G	G	SW	SW	SW	SW
Package Index	05-08-1640 (G24)	05-08-1640 (G24)	05-08-1640 (G24)	05-08-1640 (G24)	05-08-1620 (SW24)	05-08-1620 (SW24)	05-08-1620 (SW24)	05-08-1620 (SW24)	05-08-1640 (G24)	05-08-1640 (G24)	05-08-1640 (G24)	05-08-1640 (G24)	05-08-1620 (SW24)	05-08-1620 (SW24)	05-08-1620 (SW24)	05-08-1620 (SW24)
Pin Count	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24

Parametrics

Parameters / Models	LTC1421CG#PBF	LTC1421CG#TRPBF	LTC1421CG-2.5#PBF	LTC1421CG-2.5#TRPBF	LTC1421CSW#PBF	LTC1421CSW#TRPBF	LTC1421CSW-2.5#PBF	LTC1421CSW-2.5#TRPBF	LTC1421IG#PBF	LTC1421IG#TRPBF	LTC1421IG-2.5#PBF	LTC1421IG-2.5#TRPBF	LTC1421ISW#PBF	LTC1421ISW#TRPBF	LTC1421ISW-2.5#PBF	LTC1421ISW-2.5#TRPBF
Active Limiting	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Circuit Breaker Accuracy, %	20	20	20	20	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	50mV	50mV	50mV	50mV
Circuit Breakers	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2
Demo Boards	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A	DC116A-A
Export Control	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Fault Output	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Foldback	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
In-Rush Current	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp	Ramp
Isupply, mA	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Power Good Output	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Reset Output	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Sequencing	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Tracking	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Vin Range	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12	(2) 2.6 to 13.2, (1) -5 to -12

Eco Plan

	LTC1421CG#PBF	LTC1421CG#TRPBF	LTC1421CG-2.5#PBF	LTC1421CG-2.5#TRPBF	LTC1421CSW#PBF	LTC1421CSW#TRPBF	LTC1421CSW-2.5#PBF	LTC1421CSW-2.5#TRPBF	LTC1421IG#PBF	LTC1421IG#TRPBF	LTC1421IG-2.5#PBF	LTC1421IG-2.5#TRPBF	LTC1421ISW#PBF	LTC1421ISW#TRPBF	LTC1421ISW-2.5#PBF	LTC1421ISW-2.5#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
Safe Hot Swapping Using the LTC1421 &mdash DN139
PDF, 77 Kb, File published: Feb 1, 2004
Extract from the document
Safe Hot Swapping Using the LTC1421 вЂ“ Design Note 139
James Herr and Robert Reay
transistors, board connection sensing, п¬‚exible supply
voltage monitoring, power on reset output, short-circuit
protection and soft or hard reset via software control. When a circuit board is inserted into a live backplane,
the large bypass capacitors on the board can draw
huge inrush currents from the backplane power bus as
they charge. The inrush current, on the order of 10A to
100A, can destroy the boardвЂ™s bypass capacitors, metal
traces or connector pins. The inrush current can also
cause a glitch on the backplane power bus, which could
force all of the other boards in the system to reset. In
addition, the system data bus can be disrupted when
the boardвЂ™s data pins make or break contact. Typical Application
Figure 1 shows a typical application using the LTC1421.
The LTC1421 works best with a staggered, 3-level
connector. Ground makes connection п¬Ѓrst to discharge
any static build-up. VCC, VDD and VEE make connection
second and the data bus and all other pins last. The
connection sense pins CON1 and CON2 are located on
opposite ends of the connector to allow the board to
be rocked back and forth during insertion. The LTCВ®1421 can turn on two positive and one negative
board supply voltages at a programmable rate, allowing a board to be safely inserted in, or removed from, …
Download
Hot Swapping the PCI Bus &mdash DN155
PDF, 100 Kb, File published: May 15, 1997
Extract from the document
Hot Swapping the PCI Bus вЂ“ Design Note 155
James Herr, Paul Marshik and Robert Reay
The Peripheral Component Interconnect (PCI) bus has
become widely used in high volume personal computers and single-board computer designs. With a 32-bit
data path and a bandwidth of up to 133Mbps, PCI offers
the throughput demanded by the latest I/O and storage
peripherals. Unfortunately, the original PCI speciп¬Ѓcation does not require the bus to be hot swappable, so
the system power must be turned off when a peripheral
is inserted into or removed from a PCI slot. mandatory. By using the LTC В®1421 to control the power
supplies and a QuickSwitch bus switch to buffer the
data bus, a peripheral can be inserted into a PCI slot
without turning off the system power.
Inrush Current and Data Bus Problems
When the peripheral is inserted, the supply bypass
capacitors on the peripheral can draw huge transient
currents from the PCI power bus as they charge up.
The transient currents can cause permanent damage With the migration of the PCI bus into servers, industrial computers and computer telephony systems, the
ability to plug a peripheral into a live PCI slot becomes L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks
and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
PCI
CONNECTOR Q3
1/2 IRF7101 12V …

Model Line

Series: LTC1421 (16)

LTC1421CG#PBF LTC1421CG#TRPBF LTC1421CG-2.5#PBF LTC1421CG-2.5#TRPBF LTC1421CSW#PBF LTC1421CSW#TRPBF LTC1421CSW-2.5#PBF LTC1421CSW-2.5#TRPBF LTC1421IG#PBF LTC1421IG#TRPBF LTC1421IG-2.5#PBF LTC1421IG-2.5#TRPBF LTC1421ISW#PBF LTC1421ISW#TRPBF LTC1421ISW-2.5#PBF LTC1421ISW-2.5#TRPBF

Manufacturer's Classification

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