LT1172MJ8 Linear Technology, LT1172MJ8 Datasheet - Page 20

• 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
RELATED PARTS
PART NUMBER
LT1070/LT1071/LT1072
LT1074/LT1076
LT1082
LT1268/LT1268B
LT1269/LT1271
LT1270/LT1270A
LT1370
LT1371
LT1372/LT1377
LT1373
LT1374
LT1375/LT1376
LT1425
LT1507
LT1533
TYPICAL APPLICATIO
20
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 [phone]
FAX: [phone] TELEX: 499-3977 www.linear-tech.com
100 F
C5*
+
DESCRIPTION
5A/2.5A/1.25A High Efficiency Switching Regulators
5.5A/2A Step-Down Switching Regulators
1A, High Voltage, High Efficiency Switching Regulator
7.5A, 150kHz Switching Regulators
4A High Efficiency Switching Regulators
8A and 10A High Efficiency Switching Regulators
500kHz High Efficiency 6A Switching Regulator
500kHz High Efficiency 3A Switching Regulator
500kHz and 1MHz High Efficiency 1.5A Switching Regulators
250kHz Low Supply Current High Efficiency 1.5A Switching Regulator
4A, 500kHz Step-Down Switching Regulator
1.5A, 500kHz Step-Down Switching Regulators
Isolated Flyback Switching Regulator
500kHz Monolithic Buck Mode Switching Regulator
Ultralow Noise 1A Switching Regulator
28V
V
IN
* REQUIRED IF INPUT LEADS 2"
GND
U
LT1170
V
IN
V
Positive Current Boosted Buck Converter
C
V
R3
680
SW
FB
C1
0.33 F
470
2W
D2
C4
0.01 F
R7
1k
6
200pF
C3
0.47 F
4
0.002 F
V
LM308
IN
7
C6
8
1.24k
–
+
R2
1.24k
3
R4
2
R6
470
N 0.25
R5
5k
1: N
COMMENTS
40kHz, V
100kHz, Also for Positive-to-Negative Conversion
V
V
100kHz/60kHz, V
60kHz, V
High Power Boost, Flyback, SEPIC
Good for Boost, Flyback, Inverting, SEPIC
Directly Regulates V
Low 1mA Quiescent Current
Synchronizable, V
Up to 1.25A Out from an SO-8
6W Output, 5% Regulation,
No Optocoupler Needed
1.5A Switch, Good for 5V to 3.3V
Push-Pull, <100 V
IN
IN
R1
5k
to 75V, V
to 30V, V
117012fe LT/TP 1299 2K REV E • PRINTED IN USA
+
IN
IN
to 60V, V
to 30V, V
SW
SW
C2
5000 F
D1
LINEAR TECHNOLOGY CORPORATION 1991
to 100V, Telecom
to 60V
1170/1/2 TA18
IN
IN
P-P
to 30V, V
to 25V
SW
V
5V, 10A
SW
OUT
OUT
Output Noise
to 75V
to 60V
SW
to 60V