12
LT1070/LT1071
10701fd LT/TP 1098 2K REV D • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1989
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT1074/LT1076 High Voltage Switching Regulators 40V Input (60V for HV Versions), 100kHz, 5A and 2A
LT1170/LT1171/ 100kHz High Efficiency Switching Regulators 40V Input (65V for HV Versions), 5A/2.5A/1.25A Internal Switch
LT1172
LT1370/LT1371 500kHz High Efficiency Switching Regulators 35V, 6A/3A Internal Switch
LT1374/LT1376 100kHz High Efficiency Switching Regulators 25V Input, 4.5A/1.5A Internal Switch
Forward Converter
Totally Isolated Converter
1070/71 TA07
R4
1.5k
5k
500Ω
N = 0.875 = 7:8
FOR V
OUT
= 15V
*REQUIRED IF INPUT LEADS ≥ 2"
R2
SECONDARY VOLTAGE
0V
V
OUT
t
OFF
t
ON
≈16V
(N)(V
IN
)
C2
0.01µF
C5*
100µF
V
IN
5V
V
SW
V
C
V
IN
LT1070/LT1071
GND
FB
+
C3
0.47µF
N
D1
1:N
•
•
N
+
L1
10µF
L2
10µF
15V
COM
+
C4
500µF
C1
500µF
+
+
C6
200µF
C5
200µF
OPTIONAL
OUTPUT FILTER
+
–15V
SWITCH VOLTAGE
V
F
(DIODE FORWARD VOLTAGE)
0V
V
IN
+
R3
R6
330Ω
R5
1Ω
Q1
C3
C4
V
SW
L1
70µH
•
••
V
IN
C2
D3
C1
2000µF
D1
V
OUT
5V
6A
R4
T1
LT1070
GND V
C
FB
V
IN
20V TO 30V
D4
IMN
D2
1070/71 TA18
R1
3.74k
R2
1.24k
TYPICAL APPLICATIONS
U
(Note that maximum output currents are divided by 2 for the LT1071)