LTC4218CGN-TRPBF(RevB) Ver la hoja de datos (PDF) - Linear Technology
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LTC4218CGN-TRPBF Datasheet PDF : 16 Pages
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LTC4218
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)
ISENSE–(IN)
ISENSE+(IN)
Current Limit Sense Voltage Threshold
(VSENSE+ – VSENSE–)
SENSE– Pin Input Current
SENSE+ Pin Input Current
VFB = 1.23V
VFB = 0V
VFB = 1.23V, RSET = 20kΩ
VSENSE– = 12V
VSENSE+ = 12V
● 14.25
15
15.75
mV
● 2.8
3.75
4.7
mV
● 6.7
7.5 8.325
mV
●
4
±10
μA
●
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)
R(IN)
V(TH)
ΔVOV(HYST)
ΔVUV(HYST)
VUV(RTH)
ΔVFB(HYST)
RISET
ISOURCE
Outputs
V(OL)
I(OH)
VTIMER(H)
VTIMER(L)
ITIMER(UP)
ITIMER(DN)
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
ISET Pin Output Resistor
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
VIN = 1.2V, LTC4218 Only
LTC4218-12 Only
●
0
±1
μA
● 13
18
23
kΩ
VIN Rising
● 1.21 1.235 1.26
V
● 10
20
30
mV
● 50
80
110
mV
VUV Falling
● 0.55 0.62
0.7
V
● 10
20
30
mV
● 19.5
20
20.5
kΩ
VSOURCE = VGATE = 12V, LTC4218-12 Only ● 50
70
90
μA
VSOURCE = VGATE = 12V, LTC4218 Only ●
1
2
4
μA
VSOURCE = VGATE = 0V
●
0
±1
μA
IOUT = 2mA
VOUT = 30V
VTIMER Rising
VTIMER Falling
VTIMER = 0V
VTIMER = 1.2V
●
0.4
0.8
V
●
0
±10
μA
● 1.2 1.235 1.28
V
● 0.1
0.21
0.3
V
● –80 –100 –120
μA
● 1.4
2
2.6
μA
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