LT1070 Datasheet, PDF (12/12 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)
Totally Isolated Converter
OPTIONAL
OUTPUT FILTER
+ _VIN +
5V
R4
1.5k
C5*
100µF
V_IN
V_SW
LT1070/LT1071
D1
1:N
C3
0.47µF •
+
N
N⁺
•
N = 0.875 = 7:8
FOR V_OUT = 15V
C1
500µF
C4
500µF
L1
15V ^10µF
+
COM
L2 ⁺
–15V ^10µF
≈ 16V
C5
200µF
C6
200µF
FB
GND V_C
V_IN
500Ω
0V
C2 _5k
R2
0.01µF
0V
*REQUIRED IF INPUT LEADS ≥ 2"
t_OFF
t_ON
V_OUT
SWITCH VOLTAGE
V_F
(DIODE FORWARD VOLTAGE)
SECONDARY VOLTAGE
(N)(V_IN)
1070/71 TA07
V_IN
20V TO 30V
Forward Converter
V_{IN VSW}
LT1070
T1
D1
R4
C2 ^{• I M N•}
D3
•
D4
GND V_C ^FB
Q1
R3
C3
R6
C4 ^{330Ω R5}
1Ω
L1
70µH
D2
+ _C1
2000µF
V_OUT
5V
6A
R1
3.74k
R2
1.24k
1070/71 TA18
RELATED PARTS
PART NUMBER
LT1074/LT1076
LT1170/LT1171/
LT1172
LT1370/LT1371
LT1374/LT1376
DESCRIPTION
High Voltage Switching Regulators
100kHz High Efficiency Switching Regulators
500kHz High Efficiency Switching Regulators
100kHz High Efficiency Switching Regulators
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX:[phone] ^q www.linear-tech.com
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
10701fd LT/TP 1098 2K REV D • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1989