LT3486EFE 데이터 시트보기 (PDF) - Linear Technology
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LT3486EFE Datasheet PDF : 20 Pages
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LT3486
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3V, VCTRL1 = 3V, VCTRL2 = 3V, VPWM1 = 3V, VPWM2 = 3V,
VSHDN = 3V, unless otherwise noted.
PARAMETER
Minimum Operating Voltage
Maximum Operating Voltage
Feedback Voltage (FB1, FB2)
Offset between FB1 and FB2
Feedback Pin Bias Current (FB1, FB2)
Quiescent Current
Switching Frequency
Oscillator Frequency Range (Typical Value)
Nominal RT Pin Voltage
Maximum Duty Cycle
Switch Current Limit (SW1, SW2)
Switch VCESAT
Switch Leakage Current
Error Amplifier Transconductance
Error Amplifier Voltage Gain
VC1, VC2 Switching Threshold
VC1, VC2 Clamp Voltage
VC1, VC2 Source Current
VC1, VC2 Sink Current
VC1, VC2 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
CONDITIONS
VOS = |FB1-FB2|
VFB1 = VFB2 = 0.2V (Note 3)
VFB1 = VFB2 = 1V
SHDN = 0V, CTRL1 = CTRL2 = 0V
RT = 53.6k
RT = 20.5k
(Note 4)
RT = 53.6k
RT = 53.6k
RT = 20.5k
RT = 309k
ISW1 = ISW2 = 0.75A
VSW1 = VSW2 = 10V
∆I = ±5µA
VFB1 = VFB2 = 0V
VFB1 = VFB2 = 1V
VC1 = VC2 = 1V, VPWM1 = VPWM2 = 0V
VCTRL1 = VCTRL2 = 3V
VPWM1 = VPWM2 = 3V
VSHDN = 3V
IREF = 10µA
MIN
2.5
l 194
0
10
0.75
l 1.7
200
l 90
1
34
l
150
1.8
l 20
l 0.9
l
1.6
1.2
l 50
TYP MAX UNITS
V
24
V
200
206
mV
3
6
mV
45
100
nA
9
14
mA
0.1
1
µA
1
1.25
MHz
2.2
2.7
MHz
2500
kHz
0.54
V
96
%
90
%
98
%
1.3
1.6
A
300
mV
0.1
5
µA
220
µA/V
120
0.85
V
1.5
V
25
µA
25
µA
1
10
nA
35
36
V
75
mV
mV
V
30
40
µA
V
0.4
V
0.1
1
µA
V
0.4
V
20
µA
1.25
1.3
V
80
µA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3486E is guaranteed to meet specified performance
from 0°C to 85°C and is designed, characterized and expected to meet
these extended temperature limits, but is not tested at –40°C and 85°C.
The LT3486I specifications are guaranteed over the –40°C to 125°C
temperature range.
Note 3: Current flows out of the pin.
Note 4: Guaranteed by design and test correlation, not production tested.
3486fe
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