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LTC4222IUH#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
LTC4222
1
4222fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Dual Hot Swap Controller
with I
2
C Compatible
Monitoring
The LTC
®
4222 Hot Swap™ controller allows two power
paths to be safely inserted and removed from a live back-
plane. Using external N-channel pass transistors, board
supply voltages and inrush currents are ramped up at an
adjustable rate. An I
2
C interface and onboard ADC allows
for monitoring of current, voltage and fault status for
each channel.
The device features adjustable, analog, foldback current
limit circuits and a soft-start circuit that sets the dI/dt of
the inrush currents. An I
2
C interface may configure the
part to latch off or automatically restart after the LTC4222
detects a fault on either channel.
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.
Advanced Mezzanine Card Application
n
Allows Safe Insertion Into a Live Backplane
n
10-Bit ADC Monitors Currents and Voltages
n
I
2
C/SMBus Interface
n
Wide Operating Voltage Range: 2.9V to 29V
n
dI/dt Controlled Soft-Start
n
High Side Drive for External N-Channel MOSFETs
n
No External Gate Capacitors Required
n
Input Overvoltage/Undervoltage Protection
n
Optional Latchoff or Auto-Retry After Faults
n
Alert Host After Faults
n
Inrush Current Limit with Foldback
n
Available in 32-Pin (5mm × 5mm) QFN
and 36-Pin SSOP Packages
n
Live Board Insertion
n
Electronic Circuit Breakers
n
Computers, Servers
n
Platform Management
UV1 V
DD1
SENSE1
–
LTC4222
GATE1
INTV
CC
ADR2
ADR1NC
ADR0
CONFIG
SOURCE1
UV2 V
DD2
12V
7.4A
3.3V
150mA
AUXPGOOD
12PGOOD
SENSE2
–
GATE2 SOURCE2
OV1
OV2
ALERT
SCL
SDA
ON
FB1
ADIN1
TIMER
GPIO1
EN1
SS
10Ω
68nF
6mΩ
Si7336ADP
10.2k
3.57k
10k
4222 TA01a
0.1µF
34k
1.02k
3.4k
GND
ALERT
SCL
ON
SDA
12V
ADIN2
FB2
GPIO2
EN2
0.1µF
10Ω
300mΩ
Si1046R
4.99k
3.57k
10k
0.1µF
6.55k
1.02k
3.4k
3.3V
PLUG-IN
CARD
BACKPLANE
1µF
10nF
Start-Up Waveform with Sequencing
V
OUT2
10V/DIV
V
OUT1
10V/DIV
GPIO
PGOOD
10V/DIV
V
IN1/2
10V/DIV
4222 TA01b
50ms/DIV
CONTACT
BOUNCE
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. Protected by U.S. Patents including 7330065.
LTC4222
2
4222fb
ABSOLUTE MAXIMUM RATINGS
Supply Voltages (V
DDn
) .............................. –0.3V to 35V
Supply Voltage (INTV
CC
) ........................... –0.3V to 6.5V
Input Voltages
GATEn – SOURCEn (Note 3)
.................... –0.3V to 5V
SENSE
+
n ..........................V
DDn
– 6.5V to V
DDn
+ 0.3V
SENSE
–
n .............................–0.3V to SENSE
+
n + 0.3V
SOURCEn
.................................................. –5V to 35V
UVn
..................................... –0.3V to SENSE
+
n + 0.3V
ENn, FBn, ON, OVn
................................ –0.3V to 12V
ADR0-2, TIMER, SS
...............–0.3V to INTV
CC
+ 0.3V
(Notes 1, 2)
32 31 30 29 28 27 26 25
9 10 11 12
TOP VIEW
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
13 14 15 16
17
33
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1SS
CONFIG
INTV
CC
GND
ADR0
ADR1
ADR2
TIMER
EN1
ADIN1
ON
ALERT
SCL
SDA
ADIN2
EN2
OV2
UV2
V
DD2
SENSE2
–
GATE2
SOURCE2
FB2
GPIO2
OV1
UV1
V
DD1
SENSE1
–
GATE1
SOURCE1
FB1
GPIO1
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 33), PCB GND CONNECTION OPTIONAL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TOP VIEW
G PACKAGE
36-LEAD PLASTIC SSOP
36
25
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
SENSE1
–
SENSE1
+
V
DD1
UV1
OV1
SS
CONFIG
INTV
CC
GND
ADR0
ADR1
ADR2
TIMER
OV2
UV2
V
DD2
SENSE2
+
SENSE2
–
GATE1
SOURCE1
FB1
GPIO1
EN1
ADIN1
ON1
ON2
ALERT
SCL
SDAI
SDAO
ADIN2
EN2
GPIO2
FB2
SOURCE2
GATE2
T
JMAX
= 125°C, θ
JA
= 95°C/W
PIN CONFIGURATION
ORDER INFORMATION
ADINn, CONFIG ...................................... –0.3V to 12V
ALERT, SCL, SDA, SDAI, SDAO
............ –0.3V to 6.5V
Output Voltages
GATEn, GPIOn
........................................ –0.3V to 35V
Operating Temperature Range
LTC4222C
................................................ 0°C to 70°C
LTC4222I..............................................–40°C to 85°C
Storage Temperature Range
...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
SSOP
................................................................ 300°C
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4222CG#PBF LTC4222CG#TRPBF LTC4222CG 36-Lead Plastic SSOP 0°C to 70°C
LTC4222IG#PBF LTC4222IG#TRPBF LTC4222IG 36-Lead Plastic SSOP –40°C to 85°C
LTC4222CUH#PBF LTC4222CUH#TRPBF LTC4222
32-Lead (5mm × 5mm) Plastic QFN
0°C to 70°C
LTC4222IUH#PBF LTC4222IUH#TRPBF LTC4222
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
LTC4222
3
4222fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 12V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
DDn
Input Supply Range
l
2.9 29 V
I
DD1
V
DD1
Input Supply Current V
DD1
= 12V
l
0.85 1.25 mA
I
DD2
V
DD2
Input Supply Current V
DD2
= 12V, I
INTVCC
= 0mA
l
3 4.5 mA
V
DDn(UVL)
Input Supply Undervoltage Lockout V
DD
Rising
l
2.34 2.43 2.53 V
V
DDn(HYST)
Input Supply Undervoltage Lockout
Hysteresis
l
60 80 100 mV
INTV
CC
Internal Regulator Voltage I
INTVCC
= 0mA
l
3.15 3.3 3.45 V
INTV
CC(UVL)
INTV
CC
Undervoltage Lockout INTV
CC
Rising
l
2.55 2.64 2.73 V
INTV
CC(HYST)
INTV
CC
Undervoltage Lockout Hysteresis
l
35 50 65 mV
Current Limit and Circuit Breaker (Both Channels)
∆V
SENSE(TH)
Circuit Breaker Threshold (V
DD
– V
SENSE
)
l
47.5
48.75
50
50
52.5
51.25
mV
mV
∆V
SENSE
Current Limit Voltage (V
DD
– V
SENSE
) V
FB
= 1.3V
V
FB
= 0V
Start-Up Timer Expired
l
l
l
46
14
130
50
16.6
150
54
19
165
mV
mV
mV
t
D(OC)
OC Fault Filter
∆V
SENSE
= 100mV
l
10 20 30 µs
I
SENSE(IN)
SENSE
+
/SENSE
–
Pin Input Current V
SENSE
= 12V
l
0 20 45 µA
Gate Drive
∆V
GATE
External N-Channel Gate Drive
(V
GATE
– V
SOURCE
) (Note 3)
V
DD
= 2.9V to 29V
l
4.7 5.9 6.5 V
I
GATE(UP)
External N-Channel Gate Pull-Up Current Gate On, V
GATE
= 0V
l
–8 –12 –18 µA
I
GATE(DN)
External N-Channel Gate Pull-Down Current Gate Off, V
GATE
= 15V
l
0.8 1 2.0 mA
I
GATE(LIM)
Pull-Down Current from GATE to SOURCE
During OC/UVLO
V
GATE
= 15V, (V
DD
– V
SENSE
)n = 200mV 450 mA
t
PHL(SENSE)
(V
DD
– SENSE) High to GATE Low V
DD
– SENSE = 200mV, C
GATE
= 10nF
l
0.5 1 µs
V
GS(POWERBAD)
(GATE-SOURCE) Voltage for Power Bad Fault V
SOURCE
= 2.9V to 29V
l
3.8 4.3 4.7 V
Comparator Inputs
V
INPUT(TH)
CONFIG, EN, FB, ON, OV and UV Input
Threshold
V
IN
Rising
l
1.215 1.235 1.255 V
∆V
CONFIG,EN,ON(HYST)
CONFIG, EN, ON Hysteresis
l
80 128 180 mV
∆V
FB(HYST)
FB Power Good Hysteresis
l
2 7 20 mV
∆V
OV(HYST)
OV Hysteresis
l
16 24 32 mV
∆V
UV(HYST)
UV Hysteresis
l
60 90 110 mV
I
(IN)
CONFIG, FB, ON, OV and UV Input Current V
IN
= 3V
l
0 ±1 µA
I
EN(UP)
EN Pull-Up Current V
EN
= 0V
l
5 10 20 µA
V
UV(RTH)
UV Reset Threshold Voltage V
UV
Falling
l
0.36 0.4 0.46 V
∆V
UV(RHYST)
UV Reset Threshold Hysteresis
l
60 125 180 mV
V
GPIO(TH)
GPIO Input Threshold V
GPIO
Rising
l
0.8 1 1.2 V
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LTC4222IUH#PBF

Mfr. #:
Buy LTC4222IUH#PBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Dual Hot Swap Controller w/ADC and I2C
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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