LT1071 Linear Technology, LT1071 Datasheet - Page 10

• Manufacturer Part Number: LT1071
• Description: 5A and 2.5A High Efficiency Switching Regulators
• Manufacturer: Linear Technology

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