Datasheet

3
LT3466
3466fa
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
Converter 1 Current Limit (Note 5) ● 320 400 mA
Converter 2 Current Limit (Note 5) ● 320 400 mA
Converter 1 V
CESAT
I
SW1
= 300mA 360 mV
Converter 2 V
CESAT
I
SW2
= 300mA 360 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 LED Current ● 1.8 V
CTRL1 or CTRL2 Voltage to Turn-On the IC 150 mV
CTRL1 and CTRL2 Voltages to Shut Down the IC 50 mV
CTRL1, CTRL2 Pin Bias Current V
CTRL1
= V
CTRL2
= 1V ● 81012 µA
V
OUT1
Overvoltage-Lockout Threshold V
OUT1
Rising 39.5 V
V
OUT2
Overvoltage-Lockout Threshold V
OUT2
Rising 39.5 V
Schottky 1 Forward Drop I
SCHOTTKY1
= 300mA 0.85 V
Schottky 2 Forward Drop I
SCHOTTKY2
= 300mA 0.85 V
Schottky 1 Reverse Leakage V
OUT1
= 20V 5 µA
Schottky 2 Reverse Leakage V
OUT2
= 20V 5 µA
Soft-Start Time (Switcher 1) 600 µs
Soft-Start Time (Switcher 2) 600 µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3466E is guaranteed to meet specified performance from
0°C to 70°C. Specifications over the –40°C to 85°C operating range are
assured by design, characterization and correlation with statistical process
controls.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Switching Waveforms Transient Response
V
OUT1
50mV/DIV
V
SW1
20V/DIV
I
L1
100mA/DIV
V
IN
= 3.6V 0.5µs/DIV 3466 G01
CIRCUIT OF FIGURE 1
V
OUT1
0.5V/DIV
V
CTRL1
2V/DIV
I
L1
200mA/DIV
V
IN
= 3.6V 50µs/DIV 3466 G02
I
LED1
= 20mA TO 10mA
CIRCUIT OF FIGURE 1
Note 3: Current flows out of the pin.
Note 4: Guaranteed by design and test correlation, not production tested.
Note 5: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at high duty cycle.