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LTC4216IDE#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
LTC4216
22
4216fa
For more information www.linear.com/LTC4216
the RESET high when V
OUT
rises above 4.5V. Transient
voltage suppressor,
Z1, and snubber network, R
X
and
C
X
, connected at SENSEP pin are highly recommended
to protect the 5V supply system from ringing and voltage
spikes during a fault condition. The RC network, R
Y
and
C
Y
, connected at the V
CC
pin, allows the LTC4216 bias
supply to ride out supply glitches during a fault condition
or adjacent board short.
Auto-Retry after a Fault
As shown in Figure 18, the LTC4216 can be configured to
automatically retry after a fault condition by connecting
both the FAULT and ON pins together with an RC network.
The network has a pull-up resistor, R
AUTO
, tied to the load
supply (V
IN
) and an external capacitor, C
AUTO
, connected
to ground. The auto-retry circuit will attempt to restart
the LTC4216 after a circuit breaker trip, as shown in the
timing diagram of Figure 19. In addition to the cooling
cycle provided by the TIMER period during auto-retry
sequence, the RC time constant for the ON pin voltage to
reach 0.8V provides additional turn-off time to prevent
the external MOSFET from overheating. The auto-retry
duty cycle is
given by:
Duty Cycle
tt
tt tt
SS FILTER
OFF TIMER SS FILTER
≈
+
+++
•%100
(20)
where
t
TIMER
= TIMER period as given by Equation (1);
t
OFF
= time taken to charge the capacitor, C
AUTO
, from
Figure 16. PCB Connection Sensing with ON/OFF Control
Figure 17. 5V Hot Swap Application
SENSEP SENSEN
GATE
ON
TIMER
FB
FAULT
RESET
FAULT
RESET
SS
11 10 9 8
7
12
1
4
2
5 3 6
FILTER
LTC4216
R1
5.62k
1%
R5
39.2k
1%
R7
10k
R4
10k
1%
R2
4.42k
1%
R3
20k 1%
R8
10k
C
Y
330nF
C
X
100nF
LONG
BACKPLANE
CONNECTOR
(FEMALE)
PCB EDGE
CONNECTOR
(MALE)
GND
LONG
SHORT
SHORT
SHORT
C1
10nF
C2
4.7nF
C3
33nF
V
OUT
3.3V
5A
V
IN
3.3V
ON/RST
ON/OFF
GND
M1
Si4864DY
R6
10k
+
C
LOAD
1000µF
LONG
V
CC
5V
µP
LOGIC
4216 F16
V
CC
Z1
M2
M3
Z1: SMAJ6.0A
M2, M3: 2N7002K
PCB CONNECTION SENSING
R
SENSE
0.004Ω
R
Y
22Ω
R
X
10Ω
SENSEP SENSEN
GATE
ON
FB
FAULT
RESET
FAULT
RESET
SS
11 10 9 8
7
12
1
4
2
5 3 6
FILTER
LTC4216
R4
64.9k
1%
R6
10k
R3
10k
1%
R1
20k
1%
C
Y
330nF
C
Z
10nF
C
X
100nF
R2
80.6k
1%
LONG
SHORT
LONG
BACKPLANE
CONNECTOR
(FEMALE)
PCB EDGE
CONNECTOR
(MALE)
GND
C1
10nF
C2
4.7nF
C3
22nF
V
OUT
5V
5A
V
IN
5V
GND
M1
Si4864DY
R5
10k
+
C
LOAD
470µF
µP
LOGIC
4216 F17
V
CC
Z1: SMAJ6.0A
TIMER
Z1
R
SENSE
0.004Ω
R
Z
100Ω
R
Y
22Ω
R
X
10Ω
applicaTions inForMaTion
LTC4216
23
4216fa
For more information www.linear.com/LTC4216
FAULT V
OL
to V
ON(TH)
threshold (0.8V). As there is an
internal 5µA current source pull-up at the FAULT pin, it
complicates the equation for t
OFF
. This is approximately
given by:
t
RC VV
VV
RA
OFF
AUTOAUTOONT
HO
L
IN ON TH AUTO
≈
−
+µ
••()
(–
)•
()
()
5
(21)
t
FILTER
= circuit breaker response time as given by Equation
(2); t
SS
= approximated time taken to charge the soft-start
capacitor, C2, from 0V to its final value (1.65V) by 10µA
current source only.
For the component values shown, the external RC time
constant is set at 0.2 second, t
TIMER
= 62ms, t
OFF
= 25ms
at V
IN
= 5V, t
SS
= 1.6ms, t
FILTER
= 480µs and the auto-retry
duty cycle is 2.3%. The auto-retry duty cycle can be further
reduced by increasing both the t
TIMER
delay and the RC
delay. As an example, increasing the TIMER capacitor, C1,
value from 100nF to 330nF, and R
AUTO
value from 200k
to 470k reduces the duty cycle to 0.8%.
Figure 19. Auto-Retry Timing
Figure 18. Auto-Retry Application
SENSEP SENSEN
GATE
ON
FB
SS
11 10 9 8
7
12
1
4
2
5 36
FILTER
LTC4216
R3
10k
1%
R4
64.9k
1%
C
Y
330nF
C
X
100nF
R
AUTO
200k
C
AUTO
1µF
R5
10k
LONG
SHORT
LONG
BACKPLANE
CONNECTOR
(FEMALE)
PCB EDGE
CONNECTOR
(MALE)
GND
C1
100nF
C2
4.7nF
C3
22nF
V
IN
5V
V
OUT
5V
5A
GND
M1
Si4864DY
+
C
LOAD
470µF
V
CC
Z1: SMAJ6.0A
TIMER
Z1
FAULT
RESET
RESET
4216 F18
R
SENSE
0.004Ω
R
Y
22Ω
R
X
10Ω
TIMER
SENSEP–SENSEN
SENSEP
FILTER
SS
2.4µA
V
TMR(TH)
V
FILT(TH)
2µA
V
TMR(TH)
2µA
40mV
25mV
10µA
10µA
1µA
1
2 3 4 6 7 8 9
0.4V
0.8V
V
OL
10 11 12 13 145
CHECK FOR GATE, FILTER,
TIMER, SS < 0.2V
CHECK FOR GATE, FILTER,
TIMER, SS < 0.2V AND FAULT HIGH
FAULT PULLED LOW
4216 F19
ON/FAULT
0.8V
ELECTRONIC CIRCUIT
BREAKER ARMED
OUTPUT IN ANALOG CURRENT LIMIT
ON/
DEVICE RESET
1ST TIMING CYCLE RESTART
FILTER RAMPS UP WHEN
(V
SENSEP
–V
SENSEN
) >25mV
GATE
(V
GATE
– V
OUT
) > V
GS(TH)
TRACKS SS RAMP
GATE
REGULATING
60µA
t
FILTER
t
SS
t
OFF
t
TIMER
t
RST(ONLO)
t
OFF
t
TIMER
applicaTions inForMaTion
LTC4216
24
4216fa
For more information www.linear.com/LTC4216
package DescripTion
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
4.00 ±0.10
(2 SIDES)
3.00 ±0.10
(2 SIDES)
NOTE:
1. DRAWING PROPOSED TO BE A VARIATION OF VERSION
(WGED) IN JEDEC PACKAGE OUTLINE M0-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE
DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT,
SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
0.40 ±0.10
BOTTOM VIEW—EXPOSED PAD
1.70 ±0.10
0.75 ±0.05
R = 0.115
TYP
R = 0.05
TYP
2.50 REF
16
127
PIN 1 NOTCH
R = 0.20 OR
0.35 × 45°
CHAMFER
PIN 1
TOP MARK
(NOTE 6)
0.200 REF
0.00 – 0.05
(UE12/DE12) DFN 0806 REV D
2.50 REF
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
2.20 ±0.05
0.70 ±0.05
3.60 ±0.05
PACKAGE OUTLINE
3.30 ±0.10
0.25 ±0.05
0.50 BSC
1.70 ±0.05
3.30 ±0.05
0.50 BSC
0.25 ±0.05
DE/UE Package
12-Lead Plastic DFN (4mm × 3mm)
(Reference LTC DWG # 05-08-1695 Rev D)
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.53 ± 0.152
(.021 ± .006)
0.18
(.007)
0.254
(.010)
0° – 6° TYP
DETAIL “A”
DETAIL “A”
GAUGE PLANE
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
0.889 ± 0.127
(.035 ± .005)
RECOMMENDED SOLDER PAD LAYOUT
0.305 ± 0.038
(.0120 ± .0015)
TYP
0.50
(.0197)
BSC
MSOP (MS) 0307 REV E
SEATING
PLANE
1.10
(.043)
MAX
0.17 –0.27
(.007 – .011)
TYP
0.86
(.034)
REF
0.50
(.0197)
BSC
1 2
3
4 5
4.90 ± 0.152
(.193 ± .006)
0.497 ± 0.076
(.0196 ± .003)
REF
8910
7
6
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
0.1016 ± 0.0508
(.004 ± .002)
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661 Rev E)
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LTC4216IDE#PBF

Mfr. #:
Buy LTC4216IDE#PBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Ultralow V Hot Swap Cntr
Lifecycle:
New from this manufacturer.
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