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LTM8020MPV Datasheet(PDF) 11 Page - Linear Technology |
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LTM8020MPV Datasheet(HTML) 11 Page - Linear Technology |
11 / 16 page LTM8020 11 8020fb APPLICATIONS INFORMATION Table 1. Recommended External Component Values and Configuration VIN Range VOUT CIN COUT RADJ BIAS Connection 4.5V - 36V 1.25V 2.2μF 50V 1206 X7R 47μF 6.3V 1206 X5R Open >2V, < 25V 4.5V - 36V 1.5V 2.2μF 50V 1206 X7R 47μF 6.3V 1206 X5R 2.43M >2V, < 25V 4.5V - 36V 1.8V 2.2μF 50V 1206 X7R 47μF 6.3V 1206 X5R 1.1M >2V, < 25V 4.5V - 36V 2.5V 2.2μF 50V 1206 X7R 22μF 6.3V 1206 X7R 499k VOUT 4.5V - 36V 3.3V 2.2μF 50V 1206 X7R 10μF 6.3V 1206 X7R 301k VOUT 6.5V - 36V 5V 2.2μF 50V 1206 X7R 10μF 6.3V 1206 X7R 165k VOUT 4.5V - 15V 1.25V 2.2μF 16V 0805 X7R 22μF 6.3V 1206 X7R Open VIN 4.5V - 15V 1.5V 2.2μF 16V 0805 X7R 10μF 6.3V 0805 X7R 2.43M VIN 4.5V - 15V 1.8V 2.2μF 16V 0805 X7R 10μF 6.3V 0805 X7R 1.1M VIN 4.5V - 15V 2.5V 2.2μF 16V 0805 X7R 10μF 6.3V 0805 X7R 499k VIN 4.5V - 15V 3.3V 2.2μF 16V 0805 X7R 10μF 6.3V 0805 X7R 301k VOUT 6.5V - 15V 5V 2.2μF 16V 0805 X7R None 165k VOUT 9V - 24V 1.25V 1μF 25V 0805 X7R 47μF 6.3V 0805 X5R Open VIN 9V - 24V 1.5V 1μF 25V 0805 X7R 47μF 6.3V 0805 X7R 2.43M VIN 9V - 24V 1.8V 1μF 25V 0805 X7R 10μF 6.3V 0805 X7R 1.1M VIN 9V - 24V 2.5V 1μF 25V 0805 X7R 10μF 6.3V 0805 X7R 499k VIN 9V - 24V 3.3V 1μF 25V 0805 X7R 10μF 6.3V 0805 X7R 301k VOUT 9V - 24V 5V 4.7μF 25V 0805 X7R 10μF 6.3V 0805 X5R 165k VOUT 18V - 36V 1.25V 2.2μF 50V 1206 X7R 47μF 6.3V 1206 X5R Open >2V, <25V 18V - 36V 1.5V 2.2μF 50V 1206 X7R 47μF 6.3V 1206 X5R 2.43M >2V, <25V 18V - 36V 1.8V 2.2μF 50V 1206 X7R 22μF 6.3V 1206 X7R 1.1M >2V, <25V 18V - 36V 2.5V 2.2μF 50V 1206 X7R 10μF 6.3V 0805 X7R 499k VOUT 18V - 36V 3.3V 2.2μF 50V 1206 X7R 10μF 6.3V 0805 X7R 301k VOUT 18V - 36V 5V 2.2μF 50V 1206 X7R 10μF 6.3V 0805 X7R 165k VOUT 3.3V - 30V –3.3V 2.2μF 50V 1206 X7R 22μF 6.3V 0805 X7R 301k VOUT 5V - 30V –5V 2.2μF 50V 1206 X7R 10μF 6.3V 0805 X7R 165k VOUT 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 to turn on if SHDN is tied to VIN than if the turn-on is controlled by raising SHDN when VIN is in the required operating range. A graph of the input voltage required to turn the LTM8020 on when SHDN is tied to VIN or when SHDN is switched is given in the Typical Performance Characteristics section. |
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