LT1071_15 Datasheet, PDF (10/12 Pages) Linear Technology – 5A and 2.5A High Efficiency Switching Regulators

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