LT3466 Linear Technology, LT3466 Datasheet - Page 2

• Manufacturer Part Number: LT3466
• Description: Dual Full Function White LED Step-Up Converter with Built-In Schottky Diodes
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
ELECTRICAL CHARACTERISTICS
LT3466
(Note 1)
Input Voltage (V
SW1, SW2 Voltages ................................................ 44V
V
CTRL1, CTRL2 Voltages ........................................... 24V
FB1, FB2, R
Operating Temperature Range ................ –40 C to 85 C
Storage Temperature Range .................. –65 C to 125 C
Junction Temperature .......................................... 125 C
PARAMETER
Minimum Operating Voltage
Maximum Operating Voltage
FB1 Voltage
FB2 Voltage
FB1 Pin Bias Current
FB2 Pin Bias Current
Quiescent Current
Switching Frequency
Oscillator Frequency Range
Nominal R
Maximum Duty Cycle
Converter 1 Current Limit
Converter 2 Current Limit
Converter 1 V
Converter 2 V
Switch 1 Leakage Current
Switch 2 Leakage Current
CTRL1 Voltage for Full LED Current
CTRL2 Voltage for Full LED Current
CTRL1 and CTRL2 Voltage to Shut Down Chip
CTRL1, CTRL2 Pin Bias Current
V
V
range, otherwise specifications are at T
2
OUT1
OUT2
OUT1
Overvoltage Threshold
Overvoltage Threshold
, V
T
OUT2
Pin Voltage
CESAT
CESAT
T
Voltages ................................................ 2V
Voltages ............................................. 44V
IN
) ................................................... 24V
W
W W
A
= 25 C. V
CONDITIONS
V
V
V
CTRL1 = CTRL2 = 0V
R
R
R
R
R
I
I
V
V
V
SW1
SW2
FB1
FB2
FB1
T
T
T
T
T
SW1
SW2
CTRL1
U
= 48.7k
= 48.7k
= 48.7k
= 20.5k
= 267k
IN
= 0.2V (Note 3)
= 0.2V (Note 3)
= V
= 300mA
= 300mA
= 10V
= 10V
= 3V, V
= V
FB2
CTRL2
= 0.3V
The
CTRL1
= 1V
denotes specifications that apply over the full operating temperature
= 3V, V
Consult LTC Marketing for parts specified with wider operating temperature ranges.
PACKAGE/ORDER I FOR ATIO
T
CTRL2
JMAX
V
V
OUT1
SW1
SW2
OUT2
10-LEAD (3mm 3mm) PLASTIC DFN
V
IN
= 125 C,
EXPOSED PAD (PIN 11) IS GND
MUST BE SOLDERED TO PCB
= 3V, unless otherwise specified.
1
2
3
4
5
DD PACKAGE
JA
TOP VIEW
= 43 C/W,
11
JC
10
9
8
7
6
= 2.96 C/W
FB1
CTRL1
R
CTRL2
FB2
T
MIN
192
192
200
320
320
2.7
0.8
1.8
1.8
90
8
U
DD PART MARKING
0.54
0.01
0.01
TYP
200
200
400
400
360
360
92
99
10
10
16
96
10
42
42
5
1
ORDER PART
LT3466EDD
NUMBER
W
LBBH
MAX
2000
208
208
1.2
24
50
50
25
50
12
6
5
5
UNITS
U
MHz
3466f
kHz
mV
mV
mA
mA
mA
mV
mV
mV
nA
nA
%
%
%
V
V
A
V
A
A
V
V
A
V
V