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LT3466
ABSOLUTE
AXI U
RATI GS
(Note 1)
Input Voltage (V IN ) ................................................... 24V
SW1, SW2 Voltages ................................................ 44V
V OUT1 , V OUT2 Voltages ............................................. 44V
CTRL1, CTRL2 Voltages ........................................... 24V
FB1, FB2, R T Voltages ................................................ 2V
Operating Temperature Range (Note 2) ... –40 ° C to 85 ° C
PACKAGE/ORDER I FOR ATIO
Maximum Junction Temperature ......................... 125 ° C
Storage Temperature Range
DFN .................................................. –65 ° C to 125 ° C
TSSOP .............................................. –65 ° C to 150 ° C
Lead Temperature (Soldering, 10 sec, TSSOP) ..... 300 ° C
ORDER PART
TOP VIEW
ORDER PART
TOP VIEW
NUMBER
GND
1
16 GND
NUMBER
V OUT1
1
10 FB1
LT3466EDD
NC
VOUT1
2
3
15 FB1
14 CTRL1
LT3466EFE
SW1
V IN
SW2
V OUT2
2
3
4
5
11
9 CTRL1
8 R T
7 CTRL2
6 FB2
SW1
V IN
SW2
4
5
6
17
13 NC
12 R T
11 CTRL2
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
DD PART MARKING
V OUT2
GND
7
8
10 FB2
9 GND
FE PART MARKING
T JMAX = 125 ° C, θ JA = 43 ° C/W, θ JC = 2.96 ° C/W
EXPOSED PAD (PIN 11) IS GND
MUST BE SOLDERED TO PCB
LBBH
FE PACKAGE
16-LEAD PLASTIC TSSOP
T JMAX = 125 ° C, θ JA = 38 ° C/W, θ JC(PAD) = 10 ° C/W
3466EFE
EXPOSED PAD (PIN 17) IS GND
MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T A = 25 ° C. V IN = 3V, V CTRL1 = 3V, V CTRL2 = 3V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Operating Voltage
Maximum Operating Voltage
2.7
24
V
V
FB1 Voltage
FB2 Voltage
Offset Voltage (V OS ) Between FB1 and FB2 Voltages
FB1 Pin Bias Current
FB2 Pin Bias Current
Quiescent Current
Switching Frequency
Oscillator Frequency Range
Nominal R T Pin Voltage
V OS = |FB1 – FB2|
V FB1 = 0.2V (Note 3)
V FB2 = 0.2V (Note 3)
V FB1 = V FB2 = 0.3V
CTRL1 = CTRL2 = 0V
R T = 48.7k
(Note 4)
R T = 48.7k
●
●
192
192
0
0.8
200
200
200
1.5
10
10
5
16
1
0.54
208
208
7.5
50
50
7.5
25
1.2
2000
mV
mV
mV
nA
nA
mA
μ A
MHz
kHz
V
Maximum Duty Cycle
R T = 48.7k
●
90
96
%
R T = 20.5k
R T = 267k
92
99
%
%
3466fa
2
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