LT1271CQ#PBF Linear Technology, LT1271CQ#PBF Datasheet - Page 8
![IC SWTCHNG REG 4A HI-EFF 5-DD](/photos/7/55/75544/161-5-dd_sml.jpg)
LT1271CQ#PBF
Manufacturer Part Number
LT1271CQ#PBF
Description
IC SWTCHNG REG 4A HI-EFF 5-DD
Manufacturer
Linear Technology
Type
Step-Down (Buck), Inverting, Flybackr
Datasheet
1.LT1271CQ.pdf
(8 pages)
Specifications of LT1271CQ#PBF
Synchronous Rectifier
No
Number Of Outputs
1
Current - Output
4A
Frequency - Switching
60kHz
Voltage - Input
3.5 ~ 30 V
Operating Temperature
0°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Power - Output
-
Internal Switch(s)
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
LT1271/LT1269
RELATED PARTS
PART NUMBER
LT1171
LT1370
LT1371
LT1372
LT1374
LT1376
8
TYPICAL
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com
APPLICATION
DESCRIPTION
100kHz, 2.5A Boost Switching Regulator
500kHz, 6A Boost Switching Regulator
500kHz, 3A Boost Switching Regulator
500kHz, 1.5A Boost Switching Regulator
500kHz, 4.5A Buck Switching Regulator
500kHz, 1.5A Buck Switching Regulator
OPTIONAL
INTPUT
–8V TO –30V
FILTER
10 H
L3
V
IN
100 F
C3*
U
+
GND
Negative Buck Converter
LT1271
V
IN
V
MBR735
C
R3
V
C1
SW
FB
D1
R2
1.24k
COMMENTS
Good for V
6A, 42V Internal Switch
3A, 42V Internal Switch, 90% Efficiency
Also Regulates Negative Flyback Outputs
V
V
100 H
100 F
IN
IN
L1**
Up to 25V, SO-8 Package
Up to 25V, Uses 4.7 H Inductor
** COILTRONICS CTX100-2-52
C2
* REQUIRED IF INPUT LEADS 2"
+
2N3906
IN
Q1
Up to 40V
OPTIONAL
R1
4.64k
OUTPUT
FILTER
4 H
L2
+
127169fb LT/TP 0798 2K REV B • PRINTED IN USA
LOAD
12k
C4
200 F
LINEAR TECHNOLOGY CORPORATION 1992
–5.2V AT 3.5A
1271/69 TA05