AN938

Typical application

Doc ID 5410 Rev 10

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3

Typical application

Figure 22 shows the schematic of the L4973 demonstration board.

The selection of the external components allows the device to operate in the entire input

divider R3, R4. The input and output capacitors are able to sustain the RMS current in the

operating range.

3.1

Electrical specification

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Input voltage range: 8 V - 55 V

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Output voltage: 5.1 V ±3% (line, load and thermal)

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Output ripple: 51 mV

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Output current range: 1 mA - 3.5 A

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Max output ripple current: 30% Iomax

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Current limit: 4.5 A

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Switching frequency: 150 kHz.

Figure 22.

Application circuit