LT3430 Linear Technology, LT3430 Datasheet - Page 2

• Manufacturer Part Number: LT3430
• Description: High Voltage/ 3A/ 200kHz Step-Down Switching Regulator
• Manufacturer: Linear Technology

LT3430
ABSOLUTE AXI U RATI GS
ELECTRICAL CHARACTERISTICS
(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
C
C
C
IN
to Switch g
Switching Threshold
High Clamp
LT3430EFE (Note 8) ......................... – 40 C to 125 C
LT3430IFE (Note 8) ......................... – 40 C to 125 C
Line Regulation
Shifting Threshold
= 15V, V
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
)
W W
CONDITIONS
V
5.5V V
(Note 2)
dl (V
FB = 1V
FB = 1.4V
Duty Cycle = 0
SHDN = 1V
V
– 40 C T
T
I
FB = 1V
V
5.5V V
Df = 10kHz
SW
U
J
OL
C
C
= 125 C (Note 9)
Open, Boost = V
Set to Give DC = 50%
= 3A, Boost = V
+ 0.2 V
C
) = 10 A
IN
IN
J
60V
60V
C
25 C
V
OH
IN
IN
– 0.2
+ 5V, FB = 1V
+ 5V (Note 7)
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
BOOST
T
JMAX
GND
GND
SW
SW
V
V
EXPOSED PAD MUST BE SOLDERED
NC
IN
IN
= 125 C,
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TO GROUND PLANE
FE PACKAGE
TOP VIEW
JA
= 45 C/ W,
16
15
14
13
12
11
10
9
JC
= 10 C/ W
GND
SHDN
SYNC
NC
FB
V
BIAS
GND
C
1.204
1.195
1650
1000
MIN
200
125
100
184
172
2.5
93
90
3
U
1.219
2200
– 0.2
0.05
TYP
400
225
225
200
200
3.4
0.9
2.1
4.5
3.5
0.1
0.8
96
ORDER PART
LT3430EFE
LT3430IFE
NUMBER
W
J
1.234
1.243
3300
4200
= 25 C.
MAX
– 1.5
0.14
0.18
0.15
450
500
216
228
6
6
sn3430 3430is
UNITS
U
Mho
Mho
%/V
kHz
kHz
V/V
A/V
%
%
V
A
A
A
V
V
A
A
V