Datasheet

2
LT3466-1
34661f
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 2.7 V
Maximum Operating Voltage 22 V
FB1 Voltage ● 192 200 208 mV
FB2 Voltage ● 788 800 812 mV
FB1 Pin Bias Current V
FB1
= 0.2V (Note 3) 10 50 nA
FB2 Pin Bias Current V
FB2
= 0.8V (Note 3) 10 50 nA
Quiescent Current V
FB1
= V
FB2
= 1V 5 7.5 mA
CTRL1 = CTRL2 = 0V 16 25 µA
Switching Frequency R
T
= 48.7k 0.75 1 1.25 MHz
Oscillator Frequency Range (Note 4) 200 2000 kHz
Nominal R
T
Pin Voltage R
T
= 48.7k 0.54 V
Maximum Duty Cycle R
T
= 48.7k ● 90 96 %
R
T
= 20.5k 92 %
R
T
= 267k 99 %
Converter 1 Current Limit ● 310 400 mA
Converter 2 Current Limit ● 310 400 mA
Converter 1 V
CESAT
I
SW1
= 300mA 320 mV
Converter 2 V
CESAT
I
SW2
= 300mA 320 mV
Switch 1 Leakage Current V
SW1
= 10V 0.01 5 µA
Switch 2 Leakage Current V
SW2
= 10V 0.01 5 µA
CTRL1 Voltage for Full LED Current ● 1.8 V
CTRL2 Voltage for Full Feedback Voltage ● 1V
CTRL1 or CTRL2 Voltage to Turn On the IC 150 mV
CTRL1 and CTRL2 Voltages to Shut Down Chip 70 mV
CTRL1 Pin Bias Current V
CTRL1
= 1V ● 6 9 12.5 µA
CTRL2 Pin Bias Current V
CTRL2
= 1V (Note 3) ● 10 120 nA
(Note 1)
Input Voltage (V
IN
) ................................................... 24V
SW1, SW2 Voltages ................................................ 44V
V
OUT1
, V
OUT2
Voltages ............................................. 44V
CTRL1, CTRL2 Voltages ........................................... 24V
FB1, FB2 Voltages ...................................................... 2V
Operating Temperature Range (Note 2) ... –40°C to 85°C
Storage Temperature Range .................. –65°C to 125°C
Junction Temperature .......................................... 125°C
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
T
JMAX
= 125°C, θ
JA
= 43°C/W, θ
JC
= 3°C/W
EXPOSED PAD (PIN 11) IS GND
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
DD PART MARKING
LBRX
LT3466EDD-1
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.
TOP VIEW
11
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
FB1
CTRL1
R
T
CTRL2
FB2
V
OUT1
SW1
V
IN
SW2
V
OUT2
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/