lt3479efe-trpbf Linear Technology Corporation, lt3479efe-trpbf Datasheet - Page 2

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

PACKAGE/ORDER
ABSOLUTE
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
LT3479
SW, L, V
V
FBP, FBN, V
Junction Temperature .......................................... 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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 Amplifier Offset Voltage
Feedback Amplifier Voltage Gain
Feedback Amplifier Transconductance
Feedback Amplifier Sink Current
Feedback Amplifier Source Current
Switching Frequency
2
IN
, SHDN Voltages ................................................ 24V
SHDN
14-LEAD (4mm × 3mm) PLASTIC DFN
SW
SW
V
S
V
R
REF
EXPOSED PAD (PIN 15) IS PGND
IN
L
S
(MUST BE SOLDERED TO PCB)
T
T
Voltages ................................................. 42V
JMAX
Pin Current
REF
1
2
3
4
5
6
7
DE14 PACKAGE
= 125°C, θ
, R
TOP VIEW
W
T
15
MAXIMUM
, V
JA
C
= 43°C/W
Voltages ............................... 2V
14
13
12
11
10
9
8
W W
GND
GND
SS
V
FBN
FBP
V
C
REF
INFORMATION
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
U
IN
IN
FBP
FBP
T
T
T
= 17.8k
= 113k
= 1.78k
= 2.5V, V
= 2.5V, V
= 1.25V, V
= 1.25V, V
RATINGS
IN
< 24V, V
W
SHDN
SHDN
C
ORDER PART
REF
LT3479EDE
= 1V
FBN
FBN
MARKING
NUMBER
DE PART
U
Pin
= 0V
= 2.5V, V
A
3479
C
= 1.5V, V
= 1V, V
= 25°C. V
= 0.3V
The
C
U
C
C
= 0.5V
(Note 1)
= 0.3V (Not Switching)
●
= 0.5V
IN
indicates specifications which apply over the full operating
= 2.5V, V
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
TSSOP .............................................................. 300°C
SHDN
SHDN
GND
SW
SW
V
V
R
IN
EXPOSED PAD (PIN 17) IS PGND
L
S
T
(MUST BE SOLDERED TO PCB)
T
16-LEAD PLASTIC TSSOP
JMAX
= 2.5V.
1
2
3
4
5
6
7
8
= 125°C, θ
FE PACKAGE
TOP VIEW
17
JA
= 38°C/W
●
●
16
15
14
13
12
11
10
9
1.216
MIN
160
0.9
2.7
–2
GND
GND
GND
SS
V
FBN
FBP
V
C
REF
1.235
0.01
TYP
250
150
200
2.3
0.1
3.5
25
25
10
10
5
9
2
1
ORDER PART
LT3479EFE
MARKING
NUMBER
3479EFE
FE PART
1.250
MAX
0.03
1.15
100
100
100
240
2.5
7.5
4.1
1
6
UNITS
3479fa
MHz
MHz
%/V
kHz
V/V
mA
mV
µA
µA
µA
nA
nA
µS
µA
µA
V
V