LTC4218 Linear Technology, LTC4218 Datasheet - Page 3

• Manufacturer Part Number: LTC4218
• Description: Hot Swap Controller
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
SYMBOL
DC Characteristics
V
I
V
V
ΔV
V
ΔV
V
ΔV
ΔV
I
I
ΔV
ΔV
I
I
I
Inputs
I
R
V
ΔV
ΔV
V
ΔV
R
I
Outputs
V
I
V
V
I
I
DD
SENSE–(IN)
SENSE+(IN)
GATE(UP)
GATE(FST)
GATE(DN)
(IN)
SOURCE
(OH)
TIMER(UP)
TIMER(DN)
DD
DD(UVL)
DD(UVTH)
DD(OVTH)
SOURCE(PGTH)
(TH)
UV(RTH)
(OL)
TIMER(H)
TIMER(L)
(IN)
ISET
DD(UVHYST)
DD(OVHYST)
SOURCE(PGHYST)
SNS(TH)
GATE
GATE-HIGH(TH)
OV(HYST)
UV(HYST)
FB(HYST)
PARAMETER
Input Supply Range
Input Supply Current
Input Supply Undervoltage Lockout
Input Supply Undervoltage Threshold
Input Supply Undervoltage Hysteresis
Input Supply Overvoltage Threshold
Input Supply Overvoltage Hysteresis
SOURCE Powergood Threshold
SOURCE Powergood Hysteresis
Current Limit Sense Voltage Threshold
(V
SENSE
SENSE
External N-Channel Gate Drive
(V
Gate High Threshold (V
External N-Channel Gate Pull-Up Current
External N-Channel Gate Fast Pull-Down
Current
External N-Channel Gate Pull-Down Current
OV, UV, FB Pin Input Current
OV, UV, FB Pin Input Resistance
OV, UV, FB Pin Threshold Voltage
OV Pin Hysteresis
UV Pin Hysteresis
UV Pin Reset Threshold Voltage
FB Pin Power Good Hysteresis
I
SOURCE Pin Input Current
PG, FLT Pin Output Low Voltage
PG, FLT Pin Input Leakage Current
TIMER Pin High Threshold
TIMER Pin Low Threshold
TIMER Pin Pull Up Current
TIMER Pin Pull-Down Current
SET
SENSE+
GATE
Pin Output Resistor
–
+
– V
Pin Input Current
Pin Input Current
– V
SOURCE
SENSE–
)
)
GATE
– V
SOURCE
)
A
= 25°C. V
CONDITIONS
FET On
V
LTC4218-12 Only V
LTC4218-12 Only
LTC4218-12 Only V
LTC4218-12 Only
LTC4218-12 Only V
LTC4218-12 Only
V
V
V
V
V
V
I
Gate Drive On, V
Fast Turn Off, V
V
Gate Drive Off, V
V
V
LTC4218-12 Only
V
V
V
V
V
I
V
V
V
V
V
The
GATE
OUT
DD
FB
FB
FB
SENSE–
SENSE+
DD
SOURCE
SOURCE
IN
IN
UV
SOURCE
SOURCE
SOURCE
OUT
TIMER
TIMER
TIMER
TIMER
= 1.2V, LTC4218 Only
Rising
= 1.23V
= 0V
= 1.23V, R
Falling
Rising
= 2.9V to 26.5V (Note 3)
= 2mA
●
DD
= 0, –1μA
= 30V
Rising
Falling
= 0V
= 1.2V
denotes the specifi cations which apply over the full operating
= 12V
= 12V
= 12V unless otherwise noted.
=12V
=12V
= V
= V
= V
GATE
GATE
GATE
SET
GATE
GATE
GATE
= 12V, LTC4218-12 Only
= 12V, LTC4218 Only
= 0V
= 20kΩ
DD
DD
SOURCE
= 18V,
= V
= 18V,
Rising
Rising
SOURCE
Rising
= 12V
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
14.25
2.65
14.7
10.2
1.21
0.55
19.5
MIN
–80
520
183
127
–19
100
200
2.9
9.6
2.8
6.7
3.5
1.2
0.1
1.4
13
10
50
10
50
5
1
15.05
1.235
1.235
–100
2.73
9.88
10.5
3.75
6.15
0.62
0.21
TYP
640
244
170
–24
170
250
1.6
7.5
5.5
4.2
0.4
15
18
20
80
20
20
70
4
0
2
0
0
2
LTC4218
15.75
8.325
–120
MAX
26.5
2.85
10.2
15.4
10.8
1.26
20.5
1.28
760
305
213
±10
±20
–29
220
340
110
±10
4.7
6.5
4.8
0.7
0.8
0.3
2.6
±1
23
30
30
90
±1
5
4
UNITS
4218fb
3
mA
mV
mV
mV
mV
mV
mV
mA
mV
mV
mV
kΩ
kΩ
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
V
V
V
V
V
V
V
V
V
V
V
V