LT1172IN8 Linear Technology, LT1172IN8 Datasheet - Page 16

• Manufacturer Part Number: LT1172IN8
• Description: IC SWTCHNG REGULATOR HI-EFF 8DIP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, Cuk, Flyback, Forward Converterr

Specifications of LT1172IN8

• 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: -40°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

LT1170/LT1171/LT1172
TYPICAL APPLICATIONS
16
20V TO 30V
V
IN
<0.3V = NORMAL MODE
>2.5V = SHUTDOWN
OPEN = BURST MODE
+
V
IN
C1
330μF
35V
MODE LOGIC
MBR330p
C6
0.02μF
GND
220pF
0.1μF
LT1170
D1
C4
V
FB
V
IN
SW
V
C
R1
680Ω
V
C
High Efficiency 5V Buck Converter
V
R3
V
LT1170
MODE
SW
FB
C3
IN
V
C
0.03μF
R4
C5
Forward Converter
Q1
DIODE
GND
LT1432
D3
V
GND
4.7μF
TANT
IN
C3
C2
330Ω
C4
+
R6
1
V
V
V
LIM
OUT
+
M
1N4148
T1
R5
1 Ω
50μH
D4
L1
** MAXIMUM CURRENT IS DETERMINED
D2
* R2 IS MADE FROM PC BOARD
COPPER TRACES.
BY THE CHOICE OF LT1070 FAMILY.
SEE APPLICATION SECTION.
N
D1
D2
0.013Ω
R2*
2000 μ F
25μH
L1
100μF
10μH
+
3A
C1
16V
+
+
C2
390μF
16V
1170/1/2 TA17
OPTIONAL
OUTPUT
FILTER
V
5V
3A**
OUT
R1
3.74k
R2
1.24k
1170/1/2 TA16
V
5V, 6A
OUT
117012fg