LT1070_1 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
LT1765
DESCRIPTION
High Voltage Switching Regulators
100kHz High Efficiency Switching Regulators
500kHz High Efficiency Switching Regulators
100kHz High Efficiency Switching Regulators
1.25MHz, 3A, Step-Down Regulator
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.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
25V Input, TSSOP-16E, SO8 Package
10701fe
LT/CPI 0202 1.5K REV E • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1989