LT3477 LINER [Linear Technology], LT3477 Datasheet - Page 2

• Manufacturer Part Number: LT3477
• Description: 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
• Manufacturer: LINER [Linear Technology]

PACKAGE/ORDER
ABSOLUTE
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
PARAMETER
Minimum Input Voltage
Quiescent Current
Reference Voltage
Reference Voltage Line Regulation
Maximum V
LT3477
SW Pin Voltage ....................................................... 42V
V
FBP, FBN Pin Voltage ................................................ 6V
V
R
I
I
2
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ADJ1
SP1
IN
REF
T
Order Options
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
ORDER PART NUMBER
, V
, SHDN Pin Voltage ............................................ 25V
, I
, I
Pin Voltage ....................................................... 6V
C
SP2
, SS Pin Voltage .............................................. 6V
ADJ2
LT3477EUF
LT3477IUF
REF
, I
EXPOSED PAD (PIN 21) IS PGND (MUST BE SOLDERED TO PCB)
SN1
Pin Voltage ........................................... 25V
Pin Current
Tape and Reel: Add #TR
, I
SHDN
SN2
V
NC
NC
R
IN
T
W
20-LEAD (4mm × 4mm) PLASTIC QFN
MAXIMUM
1
2
3
4
5
http://www.linear.com/leadfree/
T
Pin Voltage .............................. 42V
JMAX
20 19 18 17 16
6
= 125°C, θ
UF PACKAGE
TOP VIEW
7
W W
21
8
INFORMATION
JA
CONDITIONS
V
V
E Grade
I Grade
2.5V < V
Out of Pin
U
9 10
SHDN
SHDN
= 37°C/W
UF PART MARKING
= 0V
= 2.5V, V
RATINGS
15
14
13
12
11
IN
< 25V, V
I
I
I
I
I
SP1
SN2
SP2
ADJ1
ADJ2
W
3477
3477
C
U
= 0.3V (Not Switching)
A
C
= 25°C. V
= 0.3V
The
U
(Note 1)
●
IN
indicates specifications which apply over the full operating
= 2.5V, V
Junction Temperature .......................................... 125°C
Operating Temperature Range (Note 2)
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
ORDER PART NUMBER
LT3477E ............................................. – 40°C to 85°C
LT3477I ............................................ – 40°C to 125°C
TSSOP .............................................................. 300°C
SHDN
LT3477EFE
LT3477IFE
EXPOSED PAD (PIN 21) IS PGND (MUST BE SOLDERED TO PCB)
= 2.5V.
SHDN
I
I
V
ADJ2
ADJ1
FBN
FBP
V
REF
SS
R
V
IN
C
T
T
JMAX
20-LEAD PLASTIC TSSOP
●
●
●
10
1
2
3
4
5
6
7
8
9
= 150°C, θ
FE PACKAGE
1.216
1.210
TOP VIEW
MIN
21
JA
= 40°C/W
SW PART MARKING
20
19
18
17
16
15
14
13
12
11
1.235
1.235
0.01
TYP
2.3
0.1
5.0
NC
NC
NC
SW
SW
GND
I
I
I
I
SN1
SP1
SN2
SP2
1.250
1.260
MAX
0.03
100
2.5
1.0
7.5
UNITS
3477fb
%/V
mA
µA
µA
V
V
V