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LT3466 Fiches technique(PDF) 2 Page - Linear Technology

No de pièce LT3466
Description  Dual Full Function White LED Step-Up Converter with Built-In Schottky Diodes
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
Logo LINER - Linear Technology

LT3466 Fiches technique(HTML) 2 Page - Linear Technology

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LT3466
3466f
(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 ................ –40
°C to 85°C
Storage Temperature Range .................. –65
°C to 125°C
Junction Temperature .......................................... 125
°C
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
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
DD PART MARKING
LBBH
LT3466EDD
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q 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
q
192
200
208
mV
FB2 Voltage
q
192
200
208
mV
FB1 Pin Bias Current
VFB1 = 0.2V (Note 3)
10
50
nA
FB2 Pin Bias Current
VFB2 = 0.2V (Note 3)
10
50
nA
Quiescent Current
VFB1 = VFB2 = 0.3V
5
6
mA
CTRL1 = CTRL2 = 0V
16
25
µA
Switching Frequency
RT = 48.7k
0.8
1
1.2
MHz
Oscillator Frequency Range
200
2000
kHz
Nominal RT Pin Voltage
RT = 48.7k
0.54
V
Maximum Duty Cycle
RT = 48.7k
q
90
96
%
RT = 20.5k
92
%
RT = 267k
99
%
Converter 1 Current Limit
q
320
400
mA
Converter 2 Current Limit
q
320
400
mA
Converter 1 VCESAT
ISW1 = 300mA
360
mV
Converter 2 VCESAT
ISW2 = 300mA
360
mV
Switch 1 Leakage Current
VSW1 = 10V
0.01
5
µA
Switch 2 Leakage Current
VSW2 = 10V
0.01
5
µA
CTRL1 Voltage for Full LED Current
1.8
V
CTRL2 Voltage for Full LED Current
1.8
V
CTRL1 and CTRL2 Voltage to Shut Down Chip
50
mV
CTRL1, CTRL2 Pin Bias Current
VCTRL1 = VCTRL2 = 1V
q
810
12
µA
VOUT1 Overvoltage Threshold
42
V
VOUT2 Overvoltage Threshold
42
V
TOP VIEW
11
DD PACKAGE
10-LEAD (3mm
× 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
FB1
CTRL1
RT
CTRL2
FB2
VOUT1
SW1
VIN
SW2
VOUT2


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