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: 3.5 V to 36 V

– Short minimum on-time of 50 ns

– Good EMI performance

– Psuedo-random spread spectrum

– Compatible with CISPR 25

– Low operating quiescent current of 23 μA

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

• High design flexibility

– Pin selectable VOUT: 3.3 V, 5 V, adjustable

1 V to 20 V

– Output current: 3.25 A

– Pin selectable frequency: 400 kHz, 2.1 MHz,

adjustable 250 kHz to 2200 kHz

– Pin selectable FPWM, AUTO, sync modes

– Pin compatible with:

LM63610-Q1/ LM63615-Q1/ LM63625-Q1

– TSSOP: Thermally-enhanced package

• Small solution size

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

MHz with WSON package

– Highly integrated solution

– Low component count

2 Applications

• Automotive infotainment and cluster

• Automotive body electronics and lighting

• Automotive ADAS

3 Description

The LM63635-Q1 regulator is an easy-to-use,

synchronous, step-down DC/DC converter designed

for rugged automotive applications. The LM63635-

Q1 can drive up to 3.25-A of load current from an

input of up to 36 V for WSON package and 32

V for HTSSOP package. The converter has high

light load efficiency and output accuracy in a small

solution 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 LM63635-Q1 is available in

both the HTSSOP 16-pin power package, with

PowerPAD™, and the WSON 12-pin power package.