LTC4215 Linear Technology, LTC4215 Datasheet
LTC4215
Manufacturer Part Number
LTC4215
Description
Hot Swap Controller
Manufacturer
Linear Technology
Datasheet
1.LTC4215.pdf
(24 pages)
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www.DataSheet4U.com
APPLICATIO S
FEATURES
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
TYPICAL APPLICATIO
ALERT
GND
SDA
SCL
12V
Allows Safe Insertion into Live Backplane
8-Bit ADC Monitors Current and Voltage
I
Wide Operating Voltage Range: 2.9V to 15V
dI/dt Controlled Soft-Start
High Side Drive for External N-Channel MOSFET
No External Gate Capacitor Required
Input Overvoltage/Undervoltage Protection
Optional Latchoff or Auto-Retry After Faults
Alerts Host After Faults
Inrush Current Limit with Foldback
Available in 24-Lead (4mm x 5mm) QFN and
16-Lead Narrow SSOP Packages
Live Board Insertion
Electronic Circuit Breakers
Computers, Servers
Platform Management
2
C/SMBus Interface
BACKPLANE
PLUG-IN
CARD
U
20V
0.1µF
0.1µF
2.67k
1.74k
34k
OV
SDAO
SDAI
SCL
ALERT
INTV
UV V
U
CC
DD
SENSE
ON
0.005Ω
LTC4215UFD
+
TIMER SS
SENSE
–
FDC653N
68nF
GATE
10Ω
GND
SOURCE
ADIN
GPIO
+
EN
FB
I
2
DESCRIPTIO
The LTC
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 I
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 I
automatically restart after the LTC4215 detects a current
limit fault.
The controller has additional features to interrupt the host
when a fault has occurred, notify when output power is
good, detect insertion of a load card, and power-up either
automatically upon insertion or wait for an I
to turn on.
Hot Swap is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
C
4215 TA01a
L
C Compatible Monitoring
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Hot Swap Controller with
2
2
30.1k
3.57k
C interface and onboard ADC allow for monitoring
C interface may confi gure the part to latch off or
24k
V
12V
OUT
®
4215 Hot Swap
(POWERGOOD)
CURRENT
2.5A/DIV
10V/DIV
INRUSH
10V/DIV
10V/DIV
V
V
GPIO
V
OUT
DD
C
U
L
= 12000µF
TM
controller allows a board to be
CONTACT
BOUNCE
50ms/DIV
LTC4215
2
C command
4215fb
4215 TA01b
1
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