LT1071_15 Datasheet, PDF (8/12 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)
Negative Buck Converter
OPTIONAL INPUT
FILTER
L3
+
C3
100µF
V_IN
– 20V
V_{IN VSW}
LT1070
GND V_C ^FB
C1
R3
+
D1
L1**
C2
1000µF _R1
LOAD
200µH
4.64k
Q1
2N3906
– 5.2V
4.5A
OPTIONAL
OUTPUT
+
R2
FILTER
1.24k
L2
4µH
*REQUIRED IF INPUT LEADS ≥ 2"
**PULSE ENGINEERING 92113
1070/71 TA12
C4
200µF
Positive Buck Converter
V_IN
D3
+
C5*
100µF
+
C3
2.2µF
V_{IN VSW}
LT1070
GND V_C ^FB
R3
470Ω
C1
1µF
r
D1
*REQUIRED IF INPUT LEADS ≥2"
**PULSE ENGINEERING 92112
R1
3.74k
+
R2
1.24k
D2
1N914
L2
4µH
OPTIONAL
OUTPUT
FILTER
C5
200µF
C2
1µF
L1**
100µH
+
C4
1000µF
R4
10Ω
5V
100mA ^4.5A
MINIMUM
1070/71 TA14
Negative Current Boosted Buck Converter
8
– V_IN
R5
+
V_{IN VSW}
LT1070
GND V_C ^FB
R3
C2
T1
C3
•
1:N
•
+
R1
D1
R4
Q1
12k
2N3906
MINIMUM
C1 LOAD = 10mA _{– VOUT}
5V
10A
R1 =
V_OUT – 0.6V
1mA
R2
1.24k
1070/71 TA13
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