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LTC4253CGN

Description
Hot Swap Voltage Controllers LTC4253/LTC4253A - -48V Hot Swap Controller with Sequencer
CategoryPower/power management    The power supply circuit   
File Size384KB,34 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC4253CGN Overview

Hot Swap Voltage Controllers LTC4253/LTC4253A - -48V Hot Swap Controller with Sequencer

LTC4253CGN Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionSSOP,
Reach Compliance Codenot_compliant
ECCN codeEAR99
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length4.8895 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply voltage (Vsup)14.5 V
Minimum supply voltage (Vsup)11.5 V
Nominal supply voltage (Vsup)13 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.899 mm
LTC4253/LTC4253A
–48V Hot Swap Controllers
with Sequencer
FEATURES
n
n
DESCRIPTION
The
LTC
®
4253/LTC4253A
negative voltage Hot Swap™
controllers allow a board to be safely inserted and removed
from a live backplane. Output current is controlled by three
stages of current-limiting: a timed circuit breaker, active
current limiting and a fast feedforward path that limits
peak current under worst-case catastrophic fault condi-
tions. The LTC4253/LTC4253A latch off after a circuit fault.
Adjustable undervoltage and overvoltage detectors dis-
connect the load whenever the input supply exceeds the
desired operating range. The LTC4253/LTC4253A’s supply
input is shunt-regulated, allowing safe operation with very
high supply voltages. A multifunction timer delays initial
start-up and controls the circuit breaker’s response time.
The circuit breaker’s response time can be accelerated
by sensing excessive MOSFET drain voltage, keeping the
MOSFET within its safe operating area (SOA). An adjustable
soft-start circuit controls MOSFET inrush current at start-up.
Three power good outputs are sequenced by an adjustable
timer and two ENABLE inputs to enable external power
modules at start-up or disable them if the circuit breaker
trips. The LTC4253A features tight ±1% undervoltage/
overvoltage threshold accuracy. The LTC4253/LTC4253A
are available in a 16-pin SSOP
.
n
n
n
n
n
n
n
n
Allows Safe Board Insertion and Removal from a
Live –48V Backplane
Floating Topology Permits Very High Voltage
Operation
Adjustable Analog Current Limit with Breaker Timer
Ideal for Two Battery Feeds
Fast Response Time Limits Peak Fault Current
Adjustable Undervoltage/Overvoltage Protection
with ±1% Threshold Accuracy (LTC4253A)
Three Sequenced Power Good Outputs
Adjustable Soft-Start Current Limit
Adjustable Timer with Drain Voltage Accelerated
Response
Latchoff After Fault
Available in a 16-Pin SSOP Package
APPLICATIONS
n
n
n
n
n
–48V Distributed Power Systems
Negative Power Supply Control
Central Office Switching
High Availability Servers
Disk Arrays
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.
TYPICAL APPLICATION
– 48V/2.5A Hot Swap Controller
– 48V RTN
1µF
– 48V RTN
402k
1%
10nF
EN2 EN3 V
IN
D
IN††
LTC4253
DDZ13B*
RESET
UV
OV
32.4k
1%
68nF
0.1µF
– 48V A
B3100*
0.33µF
SS
SQTIMER
TIMER
PWRGD1
PWRGD2
PWRGD3
DRAIN
GATE
SENSE
10
18nF
0.02
1M
IRF530S
*DIODES, INC.
MOC207
††
RECOMMENDED FOR HARSH ENVIRONMENTS.
V
OUT
50V
1ms/DIV
4253 TA01b
2.5k
15k(1/4W)/6
5.6k
V
IN
5.6k
100µF
5.6k
+
Start-Up Behavior
LOAD1
LOAD2
EN
EN
EN
LOAD3
GATE
10V
SS
1V
4253 TA01
SENSE
50mV
V
EE
– 48V B
B3100*
425353aff
For more information
www.linear.com/4253
1

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LTC4253CGN LTC4253CGN#TR LTC4253IGN#TR
Description Hot Swap Voltage Controllers LTC4253/LTC4253A - -48V Hot Swap Controller with Sequencer Hot Swap Voltage Controllers LTC4253/LTC4253A - -48V Hot Swap Controller with Sequencer Hot Swap Controller LTC4253/LTC4253A - -48V Hot Swap Controller with Sequencer
Is it Rohs certified? incompatible incompatible incompatible
Maker ADI ADI ADI
package instruction SSOP, SSOP, SSOP,
Reach Compliance Code not_compliant not_compliant not_compliant
ECCN code EAR99 EAR99 EAR99
Adjustable threshold YES YES YES
Analog Integrated Circuits - Other Types POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code R-PDSO-G16 R-PDSO-G16 R-PDSO-G16
JESD-609 code e0 e0 e0
length 4.8895 mm 4.8895 mm 4.8895 mm
Humidity sensitivity level 1 1 1
Number of channels 1 1 1
Number of functions 1 1 1
Number of terminals 16 16 16
Maximum operating temperature 70 °C 70 °C 85 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP SSOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 235 235 235
Certification status Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm 1.75 mm 1.75 mm
Maximum supply voltage (Vsup) 14.5 V 14.5 V 14.5 V
Minimum supply voltage (Vsup) 11.5 V 11.5 V 11.5 V
Nominal supply voltage (Vsup) 13 V 13 V 13 V
surface mount YES YES YES
Temperature level COMMERCIAL COMMERCIAL INDUSTRIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING GULL WING
Terminal pitch 0.635 mm 0.635 mm 0.635 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature 20 20 20
width 3.899 mm 3.899 mm 3.899 mm
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