DC/DC converters L598x. Free Technical Library News

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DC/DC Converters L598x

29.10.2010

The L598x is STMicroelectronics' new family of switching buck converters that is small in size and low in price. Converters are widely used in industrial, consumer segments, personal computers and data transmission. With an output current of up to 2A, a lower output voltage limit of 0,6V, and a wide input voltage range of 2,9V to 18V, this family offers great flexibility and versatility.

The built-in p-channel MOSFET (150 mΩ) with low drain-to-source resistance allows the converter to control the duty cycle up to 100%. The switching frequency can be configured from 250 kHz to 1 MHz using an external resistor. The family has additional monitoring and protection functions: overcurrent control, supply voltage control (UVLO), overtemperature control and built-in digital soft start mode.

Combined in the heat-resistant DFN3x3-8L package, these features allow you to implement reliable and compact applications with a minimum number of external components. The L598x family can be externally synchronized to each other in a master/slave configuration with a phase shift of 180°C and can be used with multilayer ceramic capacitors (MLCCs) as an output filter.

The L598x family consists of four microcircuits: L5980, L5981, L5983 and L5985, which differ in output current parameters.

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