LT3503 Просмотр технического описания (PDF) - Linear Technology
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LT3503 Datasheet PDF : 20 Pages
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LT3503
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VIN = 12V, VBOOST = 17V, unless otherwise noted. (Note 2)
PARAMETER
Switch Current Limit
Switch VCESAT
Switch Leakage Current
Minimum Boost Voltage Above Switch
BOOST Pin Current
SHDN Input Voltage High
SHDN Input Voltage Low
SHDN Bias Current
CONDITIONS
(Note 3)
ISW = 1A
ISW = 1A
ISW = 1A
VSHDN = 2.3V (Note 5)
VSHDN = 0V
MIN TYP MAX
1.45 1.75
2.2
400
2
2
2.3
25
50
2.3
0.3
6
15
0.01
0.1
UNITS
A
mV
µA
V
mA
V
V
µA
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 LT3503E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at higher duty cycle.
Note 4: Current flows out of pin.
Note 5: Current flows into pin.
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted.
Efficiency (VOUT = 3.3V)
90
L = 2.5µH
88
86
VIN = 8V
84
82
VIN = 12V
80
78
76
74
72
70
0 0.2 0.4 0.6 0.8
LOAD CURRENT (A)
1.0 1.2
3503 G01
Efficiency (VOUT = 5V)
90
L = 3.3µH
88
VIN = 12V
86
84
VIN = 16V
82
80
78
76
74
72
70
0 0.2 0.4 0.6 0.8
LOAD CURRENT (A)
1.0 1.2
3503 G02
3503f
3
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