Datasheet

10
LT1070/LT1071
10701fe
TYPICAL APPLICATIONS
U
(Note that maximum output currents are divided by 2 for the LT1071)
Current Boosted Boost Converter
+
R4
1070/71 TA11
R3
R2
1.24k
R1
27k
C2
C3
I
N
C1
V
OUT
28V
4A
D2
D1
V
SW
V
C
V
IN
LT1070
GND
V
IN
16V TO 24V
FB
+
R1
27k
R
O
(MINIMUM
LOAD)
R2
1.24k
1070/71 TA15
R3
3.3k
C2
0.22µF
C3
10µF
+
+
C1
1000µF
+
C4*
470µF
V
IN
–15V
V
OUT
–28V
1A
L1
200µH
D2
D1
V
SW
V
C
V
IN
LT1070
GND
FB
*REQUIRED IF INPUT LEADS ≥ 2"
+
R4
680Ω
1W
1070/71 TA10
1
L1
N = 5
TOTAL
INDUCTANCE = 4mH
INTERLEAVE PRIMARY
AND SECONDARY FOR
LOW LEAKAGE
INDUCTANCE
R3
10k
R2
1.24k
R1
98k
C2
0.047µF
C3
0.68µF
C1
200µF
V
OUT
100V
300mA
D2
D1
V
SW
V
C
V
IN
LT1070
GND
V
IN
15V
FB
+
Voltage Boosted Boost Converter
Negative Boost Regulator
Negative Input/Negative Output Flyback Converter
+
R5
R4
1.24k
C2
V
SW
Q1
2N3906
•
•
V
IN
C3
C1
–V
OUT
1070/71 TA17
R6
R1*
T1
1:N
LT1070/LT1071
GND V
C
FB
–V
IN
R3
1k
R2
5k
+
*R1 =
V
OUT
 – 1.6V
200µA
External Current Limit
External Current Limit
1070/71 TA04
LT1070/LT1071
V
C
GND
D1
V
X
R1
500Ω
R2
= 2V
1070/71 TA06
R2
V
IN
R1
1k
C2
C1
1000pF
NOTE THAT THE LT1070/LT1071
GND PIN IS NO LONGER COMMON
TO V
IN
–
V
SW
V
C
R
S
V
IN
LT1070/LT1071
GND
FB
+
Q1