Maxim Integrated MAX16993 PMIC for automotive applications

The Maxim Integrated MAX16993 power-management integrated circuit (PMIC) is a 2.1 MHz, multichannel, DC-DC converter. The device integrates three supplies in a small footprint. It includes one high-voltage step-down controller (OUT1) designed to run directly from a car battery and two low-voltage step-down converters (OUT2/OUT3) cascaded from OUT1. Under no-load conditions, the product consumes only 30 µA of quiescent current, making it suitable for automotive applications.

The OUT1 operates from a voltage up to 36 V continuous and is protected from load-dump transients up to 42 V. There is a pin-selectable frequency option of either 2.1 MHz or a factory-set frequency for 1.05 MHz, 525 kHz, 420 kHz or 350 kHz. OUT2 and OUT3 run directly from OUT1 and can supply output currents up to 3 A.

The device provides a spread-spectrum enable input (SSEN) to provide quick improvement in electromagnetic interference when needed. There is also a SYNC I/O for providing either an input to synchronise to an external clock source or an output of the internally generated clock.

The product includes overtemperature shutdown and overcurrent limiting. It also includes individual active-low RESET_ outputs and individual enable inputs. The active-low RESET_ outputs provide voltage monitoring for all output channels. The unit is available in a 32-pin TQFN/side-wettable QFND-EP package and is specified for operation over the -40 to +125°C automotive temperature range.