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LTC4215CUFD#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
LTC4215/LTC4215-2
1
4215fe
TYPICAL APPLICATION
DESCRIPTION
Hot Swap Controller with
I
2
C Compatible Monitoring
The LTC
®
4215/LTC4215-2 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 I
2
C 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 I
2
C interface may confi gure the part to latch off or
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
2
C command
to turn on.
The LTC4215 has a 20µs circuit breaker fi lter for applica-
tions that require a fast fault response time and it defaults
to latchoff after an overcurrent fault. The LTC4215-2 has
an extended 420µs circuit breaker fi lter for applications
where supply transients may exceed 20µs and it defaults
to restart automatically after an overcurrent fault.
FEATURES
APPLICATIONS
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
I
2
C/SMBus Interface
n
Wide Operating Voltage Range: 2.9V to 15V
n
20μs (LTC4215) or 420μs (LTC4215-2) Circuit
Breaker Timeout
n
dI/dt Controlled Soft-Start
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 Package
n
LTC4215 also available in 16-Lead Narrow SSOP
Package
+
UV V
DD
SENSE
+
SENSE
–
LTC4215UFD
GATE
TIMER SSON GND
SOURCE
OV
SDAO
SDAI
SCL
ALERT
INTV
CC
FB
EN
ADIN
GPIO
3.4k
PLUG-IN
CARD
1.18k
P6KE16A
10
0.005
FDC653N
30.1k
V
OUT
12V
3.57k
24k
4215 TA01a
C
L
INTV
CC
INTV
CC
0.1µF
CONNECTOR 2
CONNECTOR 1
0.1µF
34.8k
BACKPLANE
68nF
GND
ALERT
SCL
SDA
12V
V
OUT
10V/DIV
V
GPIO
(POWERGOOD)
10V/DIV
INRUSH
CURRENT
2.5A/DIV
V
DD
10V/DIV
50ms/DIV
42151 TA01b
C
L
= 12000µF
CONTACT
BOUNCE
12V Application with 5A Circuit Breaker Start-Up Waveform
L, LT, LTC, LTM, Linear Technology, the Linear logo and Hot Swap are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patent including 7330065.
LTC4215/LTC4215-2
2
4215fe
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
DD
) ................................ –0.3V to 24V
Supply Voltage (INTV
CC
) .......................... –0.3V to 6.5V
Input Voltages
GATE-SOURCE (Note 3) .......................... –0.3V to 5V
SENSE
+
, SENSE
–
................ V
DD
– 0.3V to V
DD
+ 0.3V
SOURCE .................................................... –5V to 24V
EN, FB, ON, OV, UV ................................ –0.3V to 12V
ADR0, ADR1, ADR2, TIMER,
ADIN, SS ................................ –0.3V to INTV
CC
+ 0.3V
ALERT SCL, SDA, SDAI, SDAO ............. –0.3V to 6.5V
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4215CGN#PBF LTC4215CGN#TRPBF 4215 16-Lead Plastic TSSOP 0°C to 70°C
LTC4215IGN#PBF LTC4215IGN#TRPBF 4215I 16-Lead Plastic TSSOP –40°C to 85°C
LTC4215CUFD#PBF LTC4215CUFD#TRPBF 4215
24-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC4215IUFD#PBF LTC4215IUFD#TRPBF 4215
24-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC4215CUFD-2#PBF LTC4215CUFD-2#TRPBF 42152
24-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC4215IUFD-2#PBF LTC4215IUFD-2#TRPBF 42152
24-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
PIN CONFIGURATION
(Notes 1, 2)
Output Voltages
GATE, GPIO ............................................ –0.3V to 24V
Operating Temperature Range
LTC4215C ................................................ 0°C to 70°C
LTC4215I.............................................. –40°C to 85°C
Storage Temperature Range
SSOP ................................................. –65°C to 150°C
QFN .................................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
SSOP ................................................................ 300°C
LTC4215 LTC4215/LTC4215-2
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
SENSE
–
V
DD
UV
SS
GND
ON
SDA
SCL
GATE
SOURCE
FB
GPIO
INTV
CC
TIMER
ADR0
ALERT
T
JMAX
= 125°C, θ
JA
= 130°C/W
8 9
TOP VIEW
25
UFD PACKAGE
24-LEAD (4mm s 5mm) PLASTIC QFN
10 11 12
24 23 22 21 20
6
5
4
3
2
1
UV
OV
SS
GND
ON
EN
SDAO
FB
GPIO
INTV
CC
TIMER
ADIN
ADR2
ADR1
V
DD
SENSE
+
SENSE
–
GATE
SOURCE
SDAI
SCL
ALERT
NC
ADR0
7
14
15
16
17
18
19
13
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 25) NOT GUARANTEED LOW IMPEDANCE TO GND,
ELECTRICAL CONNECTION OPTIONAL
LTC4215/LTC4215-2
3
4215fe
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
DD
= 12V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
DD
Input Supply Range
l
2.9 15 V
V
OV(VDD)
Input Supply Overvoltage Threshold
l
15 15.6 16.5 V
I
DD
Input Supply Current
l
35 mA
V
DD(UVL)
Input Supply Undervoltage Lockout V
DD
Rising
l
2.75 2.84 2.89 V
V
DD(HYST)
Input Supply Undervoltage Lockout Hysteresis
l
75 100 125 mV
INTV
CC
Internal Regulator Voltage V
DD
≥ 3.3V
l
2.9 3.1 3.4 V
INTV
CC(UVL)
INTV
CC
Undervoltage Lockout INTV
CC
Rising
l
2.55 2.64 2.79 V
INTV
CC(HYST)
INTV
CC
Undervoltage Lockout Hysteresis
l
20 55 75 mV
Current Limit and Circuit Breaker
ΔV
SENSE(TH)
Circuit Breaker Threshold (V
DD
– V
SENSE
)
l
22.5 25 27.5 mV
ΔV
SENSE
Current Limit Voltage (V
DD
– V
SENSE
)V
FB
= 1.3V
V
FB
= 0V
Start-Up Timer Expired
l
l
l
22
6.5
65
25
10
75
29
13
90
mV
mV
mV
t
D(OC)
OC Fault Filter
ΔV
SENSE
= 50mV, LTC4215
ΔV
SENSE
= 50mV, LTC4215-2
l
l
15
300
20
420
30
600
µs
µs
I
SENSE(IN)
SENSE +/– Input Current
V
SENSE
= 12V
l
10 20 35 µA
Gate Drive
ΔV
GATE
External N-Channel Gate Drive (V
GATE
– V
SOURCE
)
(Note 3)
V
DD
= 2.9V to 15V
l
4.7 5.9 6.5 V
I
GATE(UP)
External N-Channel Gate Pull-Up Current Gate On, V
GATE
= 0V
l
–15 –20 –30 µA
I
GATE(DN)SLOW
External N-Channel Gate Pulldown Current Gate Off, V
GATE
= 15V
l
0.8 1 1.6 mA
I
GATE(DN)FAST
Pulldown Current From GATE to SOURCE
During OC/UVLO
V
DD
– SENSE = 100mV, V
GS
= 4V
l
300 450 700 mA
t
PHL(SENSE)
(V
DD
– SENSE) High to GATE Low V
DD
– SENSE = 100mV, C
GS
= 10nF
l
0.5 1 µs
V
GS(POWERBAD)
Gate-Source Voltage for Power Bad Fault V
SOURCE
= 2.9V – 15V
l
3.8 4.3 4.7 V
ORDER INFORMATION
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4215CGN LTC4215CGN#TR 4215 16-Lead Plastic TSSOP 0°C to 70°C
LTC4215IGN LTC4215IGN#TR 4215I 16-Lead Plastic TSSOP –40°C to 85°C
LTC4215CUFD LTC4215CUFD#TR 4215
24-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC4215IUFD LTC4215IUFD#TR 4215
24-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC4215CUFD-2 LTC4215CUFD-2#TR 42152
24-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC4215IUFD-2 LTC4215IUFD-2#TR 42152
24-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
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LTC4215CUFD#PBF

Mfr. #:
Buy LTC4215CUFD#PBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Hot Swap Contr. w/ADC and I2C
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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