Applications Information - Analog Devices Linear Technology LTM8026 Manual

APPLICATIONS INFORMATION

For most applications, the design process is straight
forward, summarized as follows:
1. Look at Table 1 and find the row that has the desired
input range and output voltage.
2. Apply the recommended C
values.
Table 1. Recommended Component Values and Configuration.
(T = 25°C. See Typical Performance Characteristics for Load Conditions)
A
V V C
IN OUT IN
6V to 36V 1.2 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9m_, Chemi-Con,
6V to 36V 1.5 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9m_, Chemi-Con,
6V to 36V 1.8 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9m_, Chemi-Con,
6V to 36V 2.5 10µF, 50V, 1210 100µF, 6.3V, 1210 330µF, 4V, 27mΩ, OS-CON, 4SVPC330M
6V to 36V 3.3 10µF, 50V, 1210 100µF, 6.3V, 1210 330µF, 4V, 27mΩ, OS-CON, 4SVPC330M
7V to 36V 5 10µF, 50V, 1210 100µF, 6.3V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 3.09k
10V to 36V 8 10µF, 50V, 1210 100µF, 10V, 1210 120µF, 16V, 27m_, OS-CON, 16SVPC120M
15V to 36V 12 10µF, 50V, 1210
22V to 36V 18 10µF, 50V, 1210
28V to 36V 24 4.7µF, 50V, 1210
9V to 15V 1.2 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9mΩ, Chemi-Con,
9V to 15V 1.5 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9mΩ, Chemi-Con,
9V to 15V 1.8 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9mΩ, Chemi-Con,
9V to 15V 2.5 10µF, 50V, 1210 100µF, 6.3V, 1210 330µF, 4V, 27mΩ, OS-CON, 4SVPC330M
9V to 15V 3.3 10µF, 50V, 1210 100µF, 6.3V, 1210 330µF, 4V, 27mΩ, OS-CON, 4SVPC330M
9V to 15V 5 10µF, 50V, 1210 100µF, 6.3V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 3.09k
10V to 15V 8 10µF, 50V, 1210 100µF, 10V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 1.74k
18V to 36V 1.2 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9mΩ, Chemi-Con,
18V to 36V 1.5 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9mΩ, Chemi-Con,
18V to 36V 1.8 10µF, 50V, 1210 100µF, 6.3V, 1210 470µF, 6.3V, 9mΩ, Chemi-Con,
18V to 36V 2.5 10µF, 50V, 1210 100µF, 6.3V, 1210 330µF, 4V, 27mΩ, OS-CON, 4SVPC330M
18V to 36V 3.3 10µF, 50V, 1210 100µF, 6.3V, 1210 330µF, 4V, 27mΩ, OS-CON, 4SVPC330M
18V to 36V 5 10µF, 50V, 1210 100µF, 6.3V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 3.09k
18V to 36V 8 10µF, 50V, 1210 100µF, 10V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 1.74k
18V to 36V 12 10µF, 50V, 1210
2.7V to –3.3 10µF, 50V, 1210 100µF, 6.3V, 1210 330µF, 4V, 27mΩ, OS-CON, 4SVPC330M
32.5V*
2V to 31V* –5 10µF, 50V, 1210 100µF, 6.3V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 3.09k
2V to 28V* –8 10µF, 50V, 1210 100µF, 10V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 1.74k
3V to 24V* –12 10µF, 50V, 1210
*Running voltage. Requires at least 6V
, C , R and R
IN OUT ADJ
C CERAMIC C ELECTROLYTIC
OUT OUT
APXF6R3ARA471MH80G
APXF6R3ARA471MH80G
APXF6R3ARA471MH80G
47µF, 16V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 1.10k
22µF, 25V, 1210 47µF, 20V, 45mΩ, OS-CON, 20SVPS47M
10µF, 50V, 1206 47µF, 35V, 30mΩ, OS-CON, 35SVPC47M
APXF6R3ARA471MH80G
APXF6R3ARA471MH80G
APXF6R3ARA471MH80G
APXF6R3ARA471MH80G
APXF6R3ARA471MH80G
APXF6R3ARA471MH80G
47µF, 16V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 1.10k
47µF, 16V, 1210 120µF, 16V, 27mΩ, OS-CON, 16SVPC120M 1.10k
to start. Note: An input bulk capacitor is required.
IN
For more information
While these component combinations have been tested for
proper operation, it is incumbent upon the user to verify
proper operation over the intended system's line, load and
environmental conditions. Bear in mind that the maximum
output current is limited by junction temperature, the
relationship between the input and output voltage mag-
T
nitude and polarity and other factors. Please refer to the
R
Open
38.3k
19.6k
9.09k
5.62k
1.74k
604
523
Open
38.3k
19.6k
9.09k
5.62k
Open
38.3k
19.6k
9.09k
5.62k
5.62k
www.linear.com/LTM8026
LTM8026
f R f
ADJ OPTIMAL T(OPTIMAL) MAX
200kHz 210k 250kHz
300kHz 140k 350kHz
350kHz 118k 400kHz
450kHz 90.9k 525kHz
550kHz 75.0k 625kHz
600kHz 68.1k 700kHz
625kHz 64.9k 750kHz
650kHz 61.9k 800kHz
675kHz 59.0k 900kHz
700kHz 57.6k 1MHz
200kHz 210k 525kHz
300kHz 140k 650kHz
350kHz 118k 800kHz
450kHz 90.9k 1MHz
550kHz 75.0k 1MHz
600kHz 68.1k 1MHz
625kHz 64.9k 1MHz
200kHz 210k 250kHz
300kHz 140k 350kHz
350kHz 118k 400kHz
450kHz 90.9k 525kHz
550kHz 75.0k 625kHz
600kHz 68.1k 700kHz
625kHz 64.9k 750kHz
650kHz 61.9k 800kHz
550kHz 75.0k 625kHz
600kHz 68.1k 700kHz
625kHz 64.9k 750kHz
650kHz 61.9k 800kHz
R
T(MIN)
169k
118k
102k
78.7k
64.9k
57.6k
53.6k
49.9k
44.2k
39.2k
78.7k
61.9k
49.9k
39.2k
39.2k
39.2k
39.2k
169k
118k
102k
78.7k
64.9k
57.6k
53.6k
49.9k
64.9k
57.6k
53.6k
49.9k
8026fd
13