LT1171HVCQ#PBF Linear Technology, LT1171HVCQ#PBF Datasheet - Page 13
![IC SWTCHNG REGULATOR HI-EFF 5-DD](/photos/7/55/75544/161-5-dd_sml.jpg)
LT1171HVCQ#PBF
Manufacturer Part Number
LT1171HVCQ#PBF
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 LT1171HVCQ#PBF
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
1.25 ~ 60 V
Current - Output
2.5A
Frequency - Switching
100kHz
Voltage - Input
3 ~ 60 V
Operating Temperature
0°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Power - Output
100W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
TYPICAL APPLICATIONS
INPUT FILTER
**
OPTIONAL
*
†
REQUIRED IF INPUT LEADS ≥ 2"
PULSE ENGINEERING 92114, COILTRONICS 50-2-52
THIS CIRCUIT IS OFTEN USED TO CONVERT –48V TO 5V. TO GUARANTEE
FULL SHORT-CIRCUIT PROTECTION, THE CURRENT LIMIT CIRCUIT SHOWN
IN AN19, FIGURE 39, SHOULD BE ADDED WITH C1 REDUCED TO 200pF.
–20V
**
*
Negative-to-Positive Buck-Boost Converter
L3
V
IN
REQUIRED IF INPUT LEADS ≥ 2"
PULSE ENGINEERING 92114
COILTRONICS 50-2-52
100μF
C4*
+
INPUT FILTER
OPTIONAL
GND
L3
LT1170
–20V
V
V
IN
IN
100μF
V
C3*
C
L1**
50μH
R3
2.2k
V
SW
C1
0.22μF
FB
+
(Note that maximum output currents are divided by 2 for LT1171, by 4 for LT1172.)
R2
1.24k
†
D1
GND
Negative Buck Converter
OPTIONAL
+
OUTPUT
LT1170
FILTER
V
IN
L2
C2
1000μF
V
C
V
R3
Q1
SW
FB
C1
C3
1170/1/2 TA07
R1
11.3k
V
12V
2A
R2
1.24k
OUT
D1
L1**
50μH
LT1170/LT1171/LT1172
+
C2
1000μF
NOTE THAT THE LT1170
GND PIN IS NO LONGER
COMMON TO V
–
+
2N3906
Q1
V
IN
Q1
External Current Limit
R1
4.64k
IN
12k
R4
C1
1000pF
–
OPTIONAL
R1
.
1k
R
OUTPUT
FILTER
S
LOAD
GND
LT1170
V
–5.2V
4.5A
1170/1/2 TA09
IN
+
V
C4
200μF
C
R2
V
C2
SW
FB
1170/1/2 TA08
13
117012fg