1 Features

• AEC-Q100-Qualified for automotive applications

– Device temperature grade 1: –40°C to +125°C

ambient operating temperature

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Supports automotive system requirements

– Input voltage range: 3.5V to 36V

– Short minimum on-time of 50ns

– Good EMI performance

– Psuedo-random spread spectrum

– Compatible with CISPR 25

– Low operating quiescent current of 23μA

– Junction temperature range –40°C to +150°C

• High design flexibility with minimal external

components

– Fixed VOUT at 3.3V or 5V

– Fixed switching frequency at 400kHz or 2.1MHz

– Output current up to 3.25A

• Small design size

– As small as: 14mm × 14mm for 3.25A, 2.2MHz

with WSON package

– Highly integrated design with low external

component count

2 Applications

• Automotive infotainment and cluster

• Automotive body electronics and lighting

• Automotive ADAS

3 Description

The LM63635C-Q1 regulator is an easy-to-use,

synchronous, step-down, DC/DC converter designed

for rugged automotive applications. The LM63635CQ1

can drive up to 3.25A of load current from

an input of up to 36V. The converter has high

light load efficiency and output accuracy in a small

design size. Features such as a RESET flag and

precision enable provide both flexible and easy-to-use

solutions for a wide range of applications. Automatic

frequency foldback at light load improves efficiency

while maintaining tight load regulation. Integration

eliminates many external components and provides

a pinout designed for simple PCB layout. Protection

features include thermal shutdown, input undervoltage

lockout, cycle-by-cycle current limit, and hiccup shortcircuit

protection. The LM63635C-Q1 is available in a

WSON 12-pin power package.