Description

The PMP10604 reference design is a 2-layer board 5V: 3A output power supply using LM53603 buck regulator for cluster unit in automotive applications. The LM53603 is a 3.5V to 36V input: 3A output capable: and 2.1 MHz fixed frequency buck regulator: specially designed for automotive applications. It has exceptionally low quiescent current (24µA typical at no load): and can transit to PFM from PWM to ensure high efficiency at light load. For this reference design: it has an input voltage range of 7.5V to 36V: covering the wide variation conditions of the 12V battery in automotive space. The reference board includes an input EMI filter section: and the layout is optimized for improved EMI performance on a 2-layers PCB. The board was tested under the automotive EMC standard: CISPR 25: and the conducted emissions were in compliance with the CISPR 25 Class 5 requirements.