LT3486
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3V, V
CTRL1
= 3V, V
CTRL2
= 3V, V
PWM1
= 3V, V
PWM2
= 3V,
V
SHDN
= 3V, unless otherwise noted.
PARAMETER
Maximum Duty Cycle
CONDITIONS
R
T
= 53.6k
R
T
= 20.5k
R
T
= 309k
I
SW1
= I
SW2
= 0.75A
V
SW1
= V
SW2
= 10V
∆I = ±5µA
●
ELECTRICAL CHARACTERISTICS
MIN
90
TYP
96
90
98
1.3
300
0.1
220
120
0.85
1.5
25
25
1
36
MAX
UNITS
%
%
%
A
mV
µA
µA/V
V
V
µA
µA
nA
V
mV
mV
V
µA
V
V
µA
V
V
µA
V
µA
Switch Current Limit (SW1, SW2)
Switch V
CESAT
Switch Leakage Current
Error Amplifier Transconductance
Error Amplifier Voltage Gain
V
C1
, V
C2
Switching Threshold
V
C1
, V
C2
Clamp Voltage
V
C1
, V
C2
Source Current
V
C1
, V
C2
Sink Current
V
C1
, V
C2
Pin Leakage Current
OVP1, OVP2 Overvoltage Threshold Voltage
CTRL1, CTRL2 Voltages to Turn Off LED1, 2 Currents
CTRL1, CTRL2 Voltages to Turn On LED1, 2 Currents
CTRL1, CTRL2 Voltages for Full LED1, 2 Currents
CTRL1, CTRL2 Pin Bias Current
PWM1, PWM2 Voltage High
PWM1, PWM2 Voltage Low
PWM1, PWM2 Pin Bias Current
SHDN Voltage High
SHDN Voltage Low
SHDN Pin Bias Current
REF Voltage
REF Source Current
1
5
V
FB1
= V
FB2
= 0V
V
FB1
= V
FB2
= 1V
V
C1
= V
C2
= 1V, V
PWM1
= V
PWM2
= 0V
34
●
10
38
75
V
CTRL1
= V
CTRL2
= 3V
●
●
●
150
1.8
20
0.9
30
40
0.4
1
0.4
V
PWM1
= V
PWM2
= 3V
1.6
V
SHDN
= 3V
I
REF
= 10µA
●
0.1
1.2
50
20
1.25
80
1.3
Note 1:
Absolute maximum ratings are those beyond which the life of a
device may be impaired.
Note 2:
The LT3486E is guaranteed to meet specified performance from
0°C to 70°C and is designed, characterized and expected to meet these
extended temperature limits, but is not tested at –40°C and 85°C.
Note 3:
Current flows out of the pin.
Note 4:
Guaranteed by design and test correlation, not production tested.
3486f
3
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