LTM8020EV-PBF LINER [Linear Technology], LTM8020EV-PBF Datasheet - Page 11

• Manufacturer Part Number: LTM8020EV-PBF
• Description: 200mA, 36V DC/DC ?Module
• Manufacturer: LINER [Linear Technology]

APPLICATIONS INFORMATION
Minimum Input Voltage
The LTM8020 is a step-down converter, so a minimum
amount of headroom is required to keep the output in
regulation. For most applications at full load, the input
needs to be at least 1.5V above the desired output. In
addition, the input voltage required to turn on depends
upon how the SHDN pin is tied. It takes more input voltage
Table 1. Recommended External Component Values and Confi guration
V
4.5V - 36V
4.5V - 36V
4.5V - 36V
4.5V - 36V
4.5V - 36V
6.5V - 36V
4.5V - 15V
4.5V - 15V
4.5V - 15V
4.5V - 15V
4.5V - 15V
6.5V - 15V
9V - 24V
9V - 24V
9V - 24V
9V - 24V
9V - 24V
9V - 24V
18V - 36V
18V - 36V
18V - 36V
18V - 36V
18V - 36V
18V - 36V
3.3V - 30V
5V - 30V
IN
Range
V
1.25V
1.5V
1.8V
2.5V
3.3V
5V
1.25V
1.5V
1.8V
2.5V
3.3V
5V
1.25V
1.5V
1.8V
2.5V
3.3V
5V
1.25V
1.5V
1.8V
2.5V
3.3V
5V
–3.3V
–5V
OUT
C
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 16V 0805 X7R
2.2μF 16V 0805 X7R
2.2μF 16V 0805 X7R
2.2μF 16V 0805 X7R
2.2μF 16V 0805 X7R
2.2μF 16V 0805 X7R
1μF 25V 0805 X7R
1μF 25V 0805 X7R
1μF 25V 0805 X7R
1μF 25V 0805 X7R
1μF 25V 0805 X7R
4.7μF 25V 0805 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
2.2μF 50V 1206 X7R
IN
C
47μF 6.3V 1206 X5R
47μF 6.3V 1206 X5R
47μF 6.3V 1206 X5R
22μF 6.3V 1206 X7R
10μF 6.3V 1206 X7R
10μF 6.3V 1206 X7R
22μF 6.3V 1206 X7R
10μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
None
47μF 6.3V 0805 X5R
47μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
10μF 6.3V 0805 X5R
47μF 6.3V 1206 X5R
47μF 6.3V 1206 X5R
22μF 6.3V 1206 X7R
10μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
22μF 6.3V 0805 X7R
10μF 6.3V 0805 X7R
OUT
to turn on if SHDN is tied to V
controlled by raising SHDN when V
operating range. A graph of the input voltage required to
turn the LTM8020 on when SHDN is tied to V
SHDN is switched is given in the Typical Performance
Characteristics section.
R
Open
2.43M
1.1M
499k
301k
165k
Open
2.43M
1.1M
499k
301k
165k
Open
2.43M
1.1M
499k
301k
165k
Open
2.43M
1.1M
499k
301k
165k
301k
165k
ADJ
IN
than if the turn-on is
IN
LTM8020
is in the required
BIAS Connection
>2V, < 25V
>2V, < 25V
>2V, < 25V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
>2V, <25V
>2V, <25V
>2V, <25V
V
V
V
V
V
OUT
OUT
OUT
IN
IN
IN
IN
OUT
OUT
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
or when
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