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AN938 - Designing

General Description

For a better understanding of the device and it’s working principle, a short description of the main building blocks is given here below, with packaging options and complete block diagram.

Figure 1.

Two packaging options, with the pin function assignements.

Key Features

  • when active( high), reduces the device power consumption, signal plus power stages, at few tens of µA. DataSheet4U. com DataShe e July 1998 1/20 DataSheet4U. com DataSheet 4 U . com www. DataSheet4U. com AN938.

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AN908 APPLICATION NOTE

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com ® AN938 APPLICATION NOTE DESIGNING WITH L4973, 3.5A HIGH EFFICIENCY DC-DC CONVERTER by N. Tricomi and G. Gattavari INTRODUCTION The L4973 family is a 3.5A monolithic dc-dc converter, step- down topology, operating in continuous mode. It is realized in BCD60 II technology, and it’s available in two plastic packages, POWERDIP18(12+3+3) and SO20L (12+4+4). Two versions are available, one fixing the output voltage, without any voltage divider, at 3.3V, and the second at 5.1V. Both the regulators can control higher output voltage values, by using an external voltage divider. The operating input supply voltage is ranging from 8V to 55V, while the absolute value, with no load, is 60V.