參數(shù)資料
型號(hào)： LTC4253ACUF-ADJ#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： -48V Hot Swap Controller with Sequencer; Package: QFN; No of Pins: 20; Temperature Range: 0°C to +70°C
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20
封裝： 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD-1, QFN-20
文件頁(yè)數(shù)： 1/32頁(yè)
文件大?。?/td> 611K
代理商： LTC4253ACUF-ADJ#PBF
LTC4253A-ADJ
1
4253a-adjf
The LTC4253A-ADJ negative voltage Hot SwapTM con-
troller allows 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 LTC4253A-ADJ latches off after a circuit fault.
Undervoltage and overvoltage detectors with adjustable
thresholds and hystereses disconnect the load whenever
the input supply exceeds the desired operating range. The
LTC4253A-ADJ’s supply input is shunt-regulated, allowing
safe operation with very high supply voltages. A multifunc-
tion timer delays initial start-up and controls the circuit
breaker’s response time. The circuit breaker’s response
timecanbeacceleratedbysensingexcessiveMOSFETdrain
voltage. An adjustable soft-start circuit controls MOSFET
inrush current at start-up.
Three power good outputs can be sequenced to enable
external power modules at start-up or disable them if the
circuit breaker trips. The LTC4253A-ADJ is available in
20-pin SSOP and 20-pin (4mm
× 4mm) QFN packages.
–48V Distributed Power Systems
Negative Power Supply Control
Central Office Switching
High Availability Servers
Disk Arrays
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
Fast Response Time Limits Peak Fault Current
Adjustable Undervoltage/Overvoltage Protection
with
±1% Threshold Accuracy
Three Sequenced Power Good Outputs
Adjustable Soft-Start Current Limit
Adjustable Timer with Drain Voltage Accelerated
Response
Latchoff After Fault
Available in 20-Pin SSOP and 20-Pin (4mm
× 4mm)
QFN Packages
– 48V Hot Swap Controller
with Sequencer
–48V/2.5A Hot Swap Controller
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
5.6k
PWRGD1
VIN
EN2 EN3
VIN
VEE
SEL
LTC4253A-ADJ
LOAD1
PWRGD2
PWRGD3
OV
OVL
DRAIN
SS
GATE
SQTIMER
SENSE
TIMER
EN
LOAD2
EN
LOAD3
EN
2.5k
15k(1/4W)/6
UV
RESET
UVL
4253A TA01
10
1M
0.02
IRF530S
*DIODES, INC.
MOC207
10nF
0.68
F
0.1
F
33nF
10nF
+
100
F
0.536k
1%
B3100*
255k
1%
–48V A
–48V B
–48V RTN
2.1k
1%
1.24k
1%
B3100*
20k
1%
1
F
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Patent pending.
GATE
10V
SS
1V
SENSE
50mV
VOUT
50V
1ms/DIV
4253A TA01b
Start-Up Behavior
FOR INFORMATION PURPOSES ONLY
OBSOLETE:
Contact Linear Technology for Potential Replacement
相關(guān)PDF資料
PDF描述
LTC4253ACUF-ADJ#TRPBF -48V Hot Swap Controller with Sequencer; Package: QFN; No of Pins: 20; Temperature Range: 0°C to +70°C
LTC4253AIGN-ADJ#PBF -48V Hot Swap Controller with Sequencer; Package: SSOP; No of Pins: 20; Temperature Range: -40°C to +85°C
LTC4253AIGN-ADJ#TRPBF -48V Hot Swap Controller with Sequencer; Package: SSOP; No of Pins: 20; Temperature Range: -40°C to +85°C
LTC4253AIUF-ADJ#PBF -48V Hot Swap Controller with Sequencer; Package: QFN; No of Pins: 20; Temperature Range: -40°C to +85°C
LTC4253AIUF-ADJ#TRPBF -48V Hot Swap Controller with Sequencer; Package: QFN; No of Pins: 20; Temperature Range: -40°C to +85°C
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4253AIGN#PBF 功能描述:IC HOT SWAP CONTRLR -48V 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
LTC4253AIGN#TRPBF 功能描述:IC HOT SWAP CONTRLR -48V 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
LTC4253AIGN-ADJ 制造商:LINER 制造商全稱:Linear Technology 功能描述:-48V Hot Swap Controller with Sequencer
LTC4253AIGN-ADJ#PBF 功能描述:IC HOT SWAP CONTRLR -48V 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
LTC4253AIGN-ADJ#TRPBF 功能描述:IC HOT SWAP CONTRLR -48V 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
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