LTC4218IGN-PBF データシートの表示（PDF） - Linear Technology
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LTC4218IGN-PBF Datasheet PDF : 18 Pages
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LTC4218
Applications Information
Additional Applications
The LTC4218 has a wide operating range from 2.9V to
26.5V. The UV, OV and PG thresholds are set with a few
resistors. All other functions are independent of supply
voltage.
The last page includes a 24V application with a UV
threshold of 19.8V, an OV threshold of 28.3V and a PG
threshold of 20.75V. Figure 7 shows a 3.3V applica-
tion with a UV threshold of 2.87V, an OV threshold of
3.77V and a PG threshold of 3.05V. Figure 8 shows a
backplane resident application, where load insertion
activates turn-on.
RS
2mΩ
Q1
Si7102DN
VOUT
3.3V
3.3V
6A
Z1*
R1
10Ω
R6
14.7k
+
CL
330µF
R2
17.4k
R3
3.16k
R4
10k CT
0.1µF
SENSE– GATE SOURCE
SENSE+
VDD
FB
UV
LTC4218GN
FLT
OV
TIMER
PG
INTVCC
IOUT
C1
GND
1µF
RGATE
1k
CGATE
0.01µF
R7
10k
UV = 2.87V
OV = 3.77V
PG = 3.05V
R8
10k
RMON
20k
ADC
4218 F07
*TVS Z1: DIODES INC SMAJ17A
Figure 7. 3.3V, 6A Card Resident Application
12V
Z1*
RS
2mΩ
Q1
Si7108DN
R1
10Ω
R8
10k
CT
0.1µF
C1
1µF
SENSE– GATE SOURCE
SENSE+
VDD
FB
OV
UV
LTC4218GN
FLT
PG
TIMER
INTVCC
GND
IMON
*TVS Z1: DIODES INC SMAJ17A
12V
RGATE
1k
CGATE
0.01µF
R6
150k
R7 R4
20k 140k
R5
20k
RMON
20k
ADC
4218 F08
VOUT
12V
6A
LOAD
UV = 9.88V
OV = 15.2V
PG = 10.5V
Figure 8. 12V, 6A Backplane Resident Application with Insertion Activated Turn -On
For more information www.linear.com/LTC4218
4218fh
15
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