LT1071 Linear Technology, LT1071 Datasheet - Page 12

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

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