Datasheet

LT1170/LT1171/LT1172
15
117012fg
TYPICAL APPLICATIONS
Positive Buck Converter
C5*
100µF
V
IN
1170/1/2 TA13
R3
470Ω
5V, 4.5A
D2
1N914
C1
1µF
V
IN
V
C
FB
V
SW
LT1170
GND
REQUIRED IF INPUT LEADS ≥ 2"
PULSE ENGINEERING 92114
COILTRONICS 50-2-52
*
**
R1
3.74k
L1**
50µH
R4
10Ω
C3
2.2µF
D1
r
R2
1.24k
C2
1µF
C4
1000µF
100mA
MINIMUM
D3
OPTIONAL
OUTPUT
FILTER
C5
200µF
L2
4µH
+
+
+
+
Negative Boost Regulator
C4*
470µF
1170/1/2 TA14
R3
3.3k
C3
10µF
D1
C2
0.22µF
V
IN
V
C
FB
LT1170
GND
V
IN
–15V
REQUIRED IF INPUT LEADS ≥ 2"
*
R2
1.24k
D2
R1
27k
V
SW
L1
50µH
C1
1000µF
R
O
(MINIMUM
LOAD)
V
OUT
–28V, 1A
+
+ +
Driving High Voltage NPN
1170/1/2 TA15
D2
C1
SETS I
B
(ON)
SETS I
B
(OFF)
*
**
R2**
V
IN
V
SW
LT1170
GND
D1
Q1
R1*