LT1431IS8 Linear Technology, LT1431IS8 Datasheet - Page 9

• Manufacturer Part Number: LT1431IS8
• Description: IC REF PROGRAMMABLE .4%TOL 8SOIC
• Manufacturer: Linear Technology

Specifications of LT1431IS8

• Reference Type: Shunt, Adjustable
• Voltage - Output: 2.5 ~ 36 V
• Tolerance: ±0.4%
• Temperature Coefficient: 50ppm/°C
• Number Of Channels: 1
• Current - Cathode: 600µA
• Current - Output: 100mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Input: -
• Current - Quiescent: -

TO 5.5V
Typical applicaTions
V
IN
4.5V
LT1172
LT1072
LT1071
MEASURED EFFICIENCY
12V to 5V Buck Converter with Foldback Current Limit*
+
*CONTACT LTC FOR HIGH EFFICIENCY
SWITCHING REGULATORS
3
4
67.8% AT 2.2W
68.6% AT 2.2W
61.1% AT 4.4W
5k
50µF
V
V
LOGIC IN
R
GND-S
IN
+
COMP
TOP
HI-SIDE SWITCH
2
5
LT1089
LT1431
GND
V
IN
OUT
OUT
OUT
0.47µF
Isolated 5V to ± 15V Flyback Converter
GND-F
LT1172
LT1072
COLL
GND
OR
6
V
1
R
REF
OUT
MID
1500pF
V
V
OUT
8
7
C
3k
1.5k
PULSE ENGINEERING
MUR105
0.68µF
4N36
#PE-51515
MBR735
COILTRONICS
CTX02-11934
•
6, 7
4, 5
10
9
2
1
100
0.5W
•
•
MUR105
MUR105
0.1µF
2.4k
+
LT1431 TA09
+
3300µF
+
5V, 7A
20k
C*
C*
1
2
COLL
COMP
GND-S
15k
5
LT1431
–15V, 70mA
15V, 70mA
GND-F
V
+
6
3
80
70
50
30
60
40
REF
LT1431 TA11
0
8
Buck Converter Efficiency
1
*L BELL INDUSTRIES J.W. MILLER
13.3k
2.7k
+
Fully Loaded Output Ripple vs Filtering
2
DIVISION 9310-36 10µH, 450mA
100µF
+
3
L*
I
LOAD
C*
4
210µF
+
(A)
5
100µF
6
V
V
V
IN
IN
IN
LT1431 TA10
= 9V
= 12V
= 15V
7
30mV
LT1172
6mV
LT1431
P-P
8
P-P
40mV
8mV
LT1072
LT1431 TA12
P-P
1431fd
P-P