LT1171IQ Linear Technology, LT1171IQ Datasheet - Page 16
![IC SWTCHNG REGULATOR HI-EFF 5-DD](/photos/7/55/75544/161-5-dd_sml.jpg)
LT1171IQ
Manufacturer Part Number
LT1171IQ
Description
IC SWTCHNG REGULATOR HI-EFF 5-DD
Manufacturer
Linear Technology
Type
Step-Down (Buck), Step-Up (Boost), Inverting, Cuk, Flyback, Forward Converterr
Datasheet
1.LT1172CN8PBF.pdf
(24 pages)
Specifications of LT1171IQ
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
1.25 ~ 40 V
Current - Output
2.5A
Frequency - Switching
100kHz
Voltage - Input
3 ~ 40 V
Operating Temperature
-40°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Power - Output
100W
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1171IQ#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
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