LT3479 LINER [Linear Technology], LT3479 Datasheet - Page 3

• Manufacturer Part Number: LT3479
• Description: 3A, Full Featured DC/DC Converter with Soft-Start and Inrush Current Protection
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
PARAMETER
Minimum Input Voltage
Quiescent Current
Reference Voltage
Reference Voltage Line Regulation
Maximum V
Soft-Start Pin Current
FBP Pin Bias Current
FBN Pin Bias Current
Feedback Amplifi er Offset Voltage
Feedback Amplifi er Voltage Gain
Feedback Amplifi er Transconductance
Feedback Amplifi er Sink Current
Feedback Amplifi er Source Current
Switching Frequency
Maximum Switch Duty Cycle
SHDN Pin Current
SHDN Pin Threshold
Inductor Current Limit
Switch Current Limit
Switch V
Switch Leakage Current
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 LT3479 is guaranteed to meet performance specifi cations
from 0°C to 70°C. Specifi cations over the –40°C to 85°C operating
CESAT
REF
Pin Current
CONDITIONS
V
V
Measured at V
2.5V < V
Out of Pin
SS = 0.5V, Out of Pin
FBP – FBN, V
V
V
R
R
R
R
V
V
(Note 3)
(Note 3)
I
SW = 40V
SW
IN
IN
FBP
FBP
T
T
T
T
SHDN
SHDN
= 17.8k
= 113k
= 1.78k
= 17.8k
= 2.5V, V
= 2.5V, V
= 1A (Note 3)
= 1.25V, V
= 1.25V, V
= 5V
= 0V
IN
< 24V, V
SHDN
SHDN
C
REF
= 1V
FBN
FBN
A
= 2.5V, V
Pin
= 0V
= 25°C. V
C
= 1.5V, V
= 1V, V
= 0.3V
The
C
C
= 0.5V
C
= 0.3V (Not Switching)
l
IN
= 0.5V
denotes the specifi cations which apply over the full operating
= 2.5V, V
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.
SHDN
= 2.5V.
l
l
l
1.216
MIN
160
0.9
2.7
0.3
3.5
–2
84
3
1.235
0.01
TYP
250
150
200
120
2.3
0.1
3.5
0.1
1.5
4.5
0.2
25
25
10
10
93
30
5
9
2
1
5
LT3479
1.250
MAX
0.03
1.15
100
100
100
240
200
2.5
7.5
4.1
6.5
60
1
6
1
2
6
5
CESAT
UNITS
3479fb
3
MHz
MHz
%/V
kHz
V/V
mA
mV
mV
for
μA
μA
μA
nA
nA
μS
μA
μA
μA
μA
μA
%
V
V
V
A
A