參數(shù)資料
型號(hào)： LTC4215CUFD-3#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC24
封裝： 4 X 5 MM, PLASTIC, MO-220, QFN-24
文件頁(yè)數(shù)： 1/28頁(yè)
文件大小： 307K
代理商： LTC4215CUFD-3#TR
LTC4215-1/LTC4215-3
1
421513fc
Hot Swap Controller with
I2C Compatible Monitoring
n Live Board Insertion
n Electronic Circuit Breakers
n Computers, Servers
n Platform Management
n Allows Safe Insertion into Live Backplane
n 8-Bit ADC Monitors Current and Voltage
n I2C/SMBus Interface
n Wide Operating Voltage Range: 2.9V to 15V
n dI/dt Controlled Soft-Start
n Circuit Breaker Timeout: 20μs (LTC4215-1) or
420μs (LTC4215-3)
n Three General Purpose Outputs
n High Side Drive for External N-channel MOSFET
n No External Gate Capacitor Required
n Input Overvoltage/Undervoltage Protection
n Optional Latchoff or Auto-Retry After Faults
n Alerts Host After Faults
n Inrush Current Limit with Foldback
n Available in 24-Pin (4mm
× 5mm) QFN
The LTC4215-1/LTC4215-3 Hot Swap controllers allow
a board to be safely inserted and removed from a live
backplane. Using an external N-channel pass transistor,
board supply voltage and inrush current are ramped up at
an adjustable rate. An I2C interface and onboard ADC allow
for monitoring of load current, voltage and fault status.
The device features adjustable foldback current limit and
a soft-start pin that sets the dI/dt of the inrush current.
An I2C interface may congure the part to latch off or
automatically restart after the LTC4215-1/LTC4215-3
detect a current limit fault.
The controller has additional features to interrupt the host
when a fault has occurred, provide three general purpose
outputs, notify when output power is good, detect insertion
of a load card, and power-up either automatically upon
insertion or wait for an I2C command to turn on.
The LTC4215-1 has a 20μs circuit breaker lter for applica-
tions that require a fast fault response time. The LTC4215-3
has an extended 420μs circuit breaker lter for applications
where supply transients may exceed 20μs.
+
UV VDD SENSE
+
SENSE–
LTC4215-1
GATE
TIMER
SS
ON
INTVCC
POWERGOOD
RESET
OK LED
MEASURED
VOLTAGE
GND
EN
SOURCE
OV
SDAI
SDAO
SCL
ADR0
ADR1
FB
GPIO1
GPIO2
GPIO3
ADIN
3.4k
PLUG-IN
CARD
1.18k
P6KE16A
10Ω
0.005Ω
FDC653N
30.1k
VOUT
12V
3.57k
4215 TA01a
CL
0.1μF
CONNECTOR
2
CONNECTOR
1
34.8k
BACKPLANE
68nF
0.1μF
GND
SCL
SDA
12V
12V Application With 5A Circuit Breaker
Start-Up Waveform
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
VOUT
10V/DIV
VGPIO1
10V/DIV
INRUSH
CURRENT
2.5A/DIV
VDD
10V/DIV
40ms/DIV
42151 TA01b
CL = 12000μF
5k PULL-UP TO VDD
CONTACT
BOUNCE
L, LT, LTC, LTM, Linear Technology and the Linear logo 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. Protected by U.S. Patent 7330065.
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