LT3460 Ver la hoja de datos (PDF) - Linear Technology
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LT3460 Datasheet PDF : 12 Pages
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LT3460/LT3460-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 3V, VSHDN = 3V, unless otherwise noted.
LT3460
LT3460-1
PARAMETER
CONDITIONS
MIN TYP MAX MIN TYP MAX UNITS
Minimum Operating
Voltage
2.5
2.5
V
Maximum Operating
Voltage
16
16
V
Feedback Voltage
1.235 1.255 1.275 1.235 1.255 1.275
V
l 1.225
1.280 1.225
1.280
V
Feedback Line Regulation 2.5V < VIN < 16V
FB Pin Bias Current
0.015
l
5
25
80
0.015
%/V
0
25
80
nA
Supply Current
SHDN = 0V
2.0
3.0
0.1
0.5
1.0
1.5
mA
0.1
0.5
μA
Switching Frequency
1.0
1.3
1.7 0.35 0.65 1.0 MHz
Maximum Duty Cycle
85
90
80
90
%
Switch Current Limit
300
420
600
180
260 380
mA
Switch VCESAT
Switch Leakage Current
SHDN Voltage High
SHDN Voltage Low
SHDN Pin Bias Current
ISW = 250mA (LT3460), ISW = 100mA (LT3460-1)
VSW = 5V
320
450
220 350
mV
0.01
1
0.01
1
μA
1.5
1.5
V
0.4
0.4
V
40
15
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 LT3460E/LT3460-1E is guaranteed to meet specifications from
0°C to 70°C. Specifications over the –40°C to 85°C operating temperature
range are assured by design, characterization and correlation with
statistical process controls.
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current
2.5
–50°C
2.0
100°C
1.5
1.0
25°C
LT3460
LT3460-1
0.5
0
0
5
10
15
VIN (V)
3460 G01
Switching Frequency
1.4
1.2
LT3460
1.0
0.8
0.6
LT3460-1
0.4
0.2
0
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
3460 G02
SHDN Pin Bias Current
400
350
300
SHDN = 16V (LT3460)
250
200
150
SHDN = 16V (LT3460-1)
100 SHDN = 3V (LT3460-1)
50
SHDN = 3V (LT3460)
0
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
3460 G03
3460fb
3
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