LT1172MJ8 Linear Technology, LT1172MJ8 Datasheet - Page 14

• Manufacturer Part Number: LT1172MJ8
• Description: SP-SWREG/Monolithic, 100kHz 5A 2.5A And 1.25A High Efficiency Switching Regulato
• Manufacturer: Linear Technology

LT1 170/LT1 171/LT1172
14
TYPICAL APPLICATIO S
20V TO 30V
V
IN
<0.3V = NORMAL MODE
>2.5V = SHUTDOWN
OPEN = BURST MODE
+
V
IN
C1
330 F
35V
MODE LOGIC
MBR330p
C6
0.02 F
U
GND
220pF
0.1 F
D1
C4
LT1170
FB
V
V
SW
IN
V
C
R1
680
V
High Efficiency 5V Buck Converter
C
LT1170
V
V
R3
MODE
IN
SW
FB
C3
V
C
0.03 F
C5
R4
Forward Converter
Q1
DIODE
GND
LT1432
D3
V
GND
4.7 F
TANT
IN
C3
C2
+
330
C4
R6
V
V
1
V
LIM
OUT
+
M
1N4148
50 H
T1
R5
1
** MAXIMUM CURRENT IS DETERMINED
L1
D4
D2
* R2 IS MADE FROM PC BOARD
COPPER TRACES.
BY THE CHOICE OF LT1070 FAMILY.
SEE APPLICATION SECTION.
N
D1
D2
0.013
R2*
2000 F
25 H
100 F
L1
10 H
+
3A
16V
C1
+
+
C2
390 F
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