lt3431efe-trpbf Linear Technology Corporation, lt3431efe-trpbf Datasheet - Page 2

• Manufacturer Part Number: lt3431efe-trpbf
• Description: High Voltage, 3a, 500khz Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
LT3431
ABSOLUTE AXI U RATI GS
(Note 1)
Input Voltage (V
BOOST Pin Above SW ............................................ 35V
BOOST Pin Voltage ................................................. 68V
SYNC Voltage ........................................................... 7V
SHDN Voltage ........................................................... 6V
BIAS Pin Voltage .................................................... 30V
FB Pin Voltage/Current .................................. 3.5V/2mA
Operating Junction Temperature Range
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
The
V
PARAMETER
Reference Voltage (V
FB Input Bias Current
Error Amp Voltage Gain
Error Amp g
V
EA Source Current
EA Sink Current
V
V
Switch Current Limit
Switch On Resistance
Maximum Switch Duty Cycle
Switch Frequency
f
f
2
SW
SW
IN
C
C
C
to Switch g
Switching Threshold
High Clamp
LT3431EFE (Notes 8, 10) ................. – 40 C to 125 C
LT3431IFE (Notes 8, 10) ................. – 40 C to 125 C
= 15V, V
Line Regulation
Shifting Threshold
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
m
C
m
= 1.5V, SHDN = 1V, BOOST open circuit, SW open circuit, unless otherwise noted.
REF
IN
) ................................................. 60V
W
)
FB = 1V or V
CONDITIONS
5.5V V
V
(Note 2)
dl (V
FB = 1V or V
FB = 1.4V or V
Duty Cycle = 0
SHDN = 1V
V
(Note 9)
I
V
5.5V V
Df = 10kHz
SW
OL
C
C
W W
Open, BOOST = V
Set to Give DC = 50%
= 2.5A, BOOST = V
+ 0.2 V
C
) = 10 A
IN
IN
SENSE
SENSE
60V
60V
C
SENSE
V
OH
= 4.1V
= 4.1V
= 5.7V
IN
– 0.2
IN
+ 5V, FB = 1V or V
U
+ 5V (Note 7)
SENSE
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
= 4.1V
T
JMAX
= 125 C,
EXPOSED PAD MUST BE SOLDERED
BOOST
GND
GND
SW
SW
V
V
NC
–40 C Tj 25 C
Tj = 125 C
IN
IN
16-LEAD PLASTIC TSSOP
TO GROUND PLANE
1
2
3
4
5
6
7
8
JA
= 45 C/ W,
FE PACKAGE
TOP VIEW
JC
16
15
14
13
12
11
10
9
(PAD) = 10 C/W
GND
SHDN
SYNC
NC
FB
V
BIAS
GND
C
1.204
1.195
1650
1000
MIN
200
125
100
460
430
3.0
2.5
88
80
U
FE PART MARKING
1.219
2200
–0.2
0.05
TYP
475
275
275
500
500
3.4
0.8
2.1
0.1
0.8
92
5
4
ORDER PART
LT3431EFE
LT3431IFE
NUMBER
3431EFE
3431IFE
W
J
1.234
1.243
3300
4200
= 25 C.
MAX
–1.5
0.14
0.18
0.15
450
500
540
570
6.5
5.5
sn3431 3431fs
UNITS
U
Mho
Mho
%/V
kHz
kHz
V/V
A/V
%
%
V
V
A
A
A
V
V
A
A
V