LT3466 Ver la hoja de datos (PDF) - Linear Technology
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LT3466 Datasheet PDF : 20 Pages
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LT3466
ABSOLUTE AXI U RATI GS (Note 1)
Input Voltage (VIN) ................................................... 24V
SW1, SW2 Voltages ................................................ 44V
VOUT1, VOUT2 Voltages ............................................. 44V
CTRL1, CTRL2 Voltages ........................................... 24V
FB1, FB2, RT Voltages ................................................ 2V
Operating Temperature Range (Note 2) ... –40°C to 85°C
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
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VOUT1 1
SW1 2
VIN 3
SW2 4
VOUT2 5
10 FB1
9 CTRL1
11
8 RT
7 CTRL2
6 FB2
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, θJC = 2.96°C/W
EXPOSED PAD (PIN 11) IS GND
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
LT3466EDD
DD PART MARKING
LBBH
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
GND 1
NC 2
VOUT1 3
SW1 4
VIN 5
SW2 6
VOUT2 7
GND 8
16 GND
15 FB1
14 CTRL1
13 NC
17
12 RT
11 CTRL2
10 FB2
9 GND
FE PACKAGE
16-LEAD PLASTIC TSSOP
TJMAX = 125°C, θJA = 38°C/W, θJC(PAD) = 10°C/W
EXPOSED PAD (PIN 17) IS GND
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
LT3466EFE
FE PART MARKING
3466EFE
ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN = 3V, VCTRL1 = 3V, VCTRL2 = 3V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Operating Voltage
2.7
V
Maximum Operating Voltage
24
V
FB1 Voltage
● 192
200
208
mV
FB2 Voltage
● 192
200
208
mV
Offset Voltage (VOS) Between FB1 and FB2 Voltages
FB1 Pin Bias Current
FB2 Pin Bias Current
Quiescent Current
VOS = |FB1 – FB2|
VFB1 = 0.2V (Note 3)
VFB2 = 0.2V (Note 3)
VFB1 = VFB2 = 0.3V
CTRL1 = CTRL2 = 0V
0
1.5
7.5
mV
10
50
nA
10
50
nA
5
7.5
mA
16
25
µA
Switching Frequency
Oscillator Frequency Range
RT = 48.7k
(Note 4)
0.8
1
1.2
MHz
200
2000
kHz
Nominal RT Pin Voltage
Maximum Duty Cycle
RT = 48.7k
RT = 48.7k
RT = 20.5k
RT = 267k
0.54
V
● 90
96
%
92
%
99
%
3466fa
2
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