LT1172CN8 Linear Technology, LT1172CN8 Datasheet - Page 15

• Manufacturer Part Number: LT1172CN8
• Description: IC SWTCHNG REGULATOR HI-EFF 8DIP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, Cuk, Flyback, Forward Converterr

Specifications of LT1172CN8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 40 V
• Current - Output: 1.25A
• Frequency - Switching: 100kHz
• Voltage - Input: 3 ~ 40 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power - Output: 100W
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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