lt3479efe-trpbf Linear Technology Corporation, lt3479efe-trpbf Datasheet - Page 3

• Manufacturer Part Number: lt3479efe-trpbf
• Description: 3a, Full Featured Dc/dc Converter With Soft-start And Inrush Current Protection
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
PARAMETER
Maximum Switch Duty Cycle
SHDN Pin Current
SHDN Pin Threshold
Inductor Current Limit
Switch Current Limit
Switch V
Switch Leakage Current
Note 1: Absolute Maximum Ratings are those values beyond which the life
to the device may be impaired.
Note 2: The LT3479 is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the – 40°C to 85°C operating
TYPICAL PERFOR A CE CHARACTERISTICS
1.625
1.375
1.250
1.750
1.500
0.1
0.5
0.4
0.3
0.2
0
–50
Switch V
0
SHDN Pin Turn-On Threshold
CESAT
–25
0.5
CE(SAT)
SWITCH CURRENT (A)
0
TEMPERATURE (°C)
1
25
25°C
1.5
50
2
125°C
75
W
2.5
100
–50°C
3479 G04
3479 G01
U
125
3
CONDITIONS
R
V
V
(Note 3)
(Note 3)
I
SW = 40V
SW
SHDN
SHDN
T
= 17.8k
= 1A (Note 3)
50
40
30
20
10
0
6
5
4
3
2
1
0
–50
= 5V
= 0V
A
Inductor and Switch Current Limit
SHDN Pin Current
0
= 25°C. V
–25
The
4
INDUCTOR CURRENT LIMIT
0
●
TEMPERATURE (°C)
SWITCH CURRENT LIMIT
IN
8
indicates specifications which apply over the full operating
= 2.5V, V
V
25
SHDN
12
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Inductor Current Limit, Switch Current Limit and Switch V
DE package guaranteed by design and/or correlation to static test.
125°C
–50°C
50
25°C
(V)
16
SHDN
75
= 2.5V.
100
20
3479 G02
3479 G05
125
24
●
1.27
1.26
1.25
1.24
1.23
1.22
1.21
5
3
2
6
4
–50
–50
MIN
0.3
3.5
84
V
V
3
V
REF
IN
C
–25
–25
= 0.3V
Pin Current
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TYP
120
0.1
1.5
4.5
0.2
93
30
5
25
25
V
V
IN
IN
50
= 2.5V
50
= 24V
75
75
MAX
LT3479
200
6.5
60
1
2
6
5
100
100
CESAT
125
125
UNITS
3479 G06
3479 G03
3479fa
3
mV
150
150
for
µA
µA
µA
%
V
A
A