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LTC4218CDHC Arkusz danych(PDF) 3 Page - Linear Technology

Numer części LTC4218CDHC
Szczegółowy opis  Hot Swap Controller
PDF  16 Pages
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Producent  LINER [Linear Technology]
Strona internetowa  http://www.linear.com
Logo LINER - Linear Technology

LTC4218CDHC Arkusz danych(HTML) 3 Page - Linear Technology

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



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