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

• Synchronous DC/DC converter with a versatile

buck controller and robust power MOSFETs

– Wide input voltage range: 4.5V to 45V

– Shutdown mode current: 2.3μA

– No-load IQ regulating 12V to 5V: 15.5μA

– 1% accurate, fixed 3.3V, 5V, 12V, or adjustable

outputs from 0.8V to 36V

– Dual-phase operation enabling output currents

up to 16A

• Designed for low EMI requirements

– Facilitates CISPR 25 Class 5 compliance

– Pin-selectable ±8% dual-random spread

spectrum reduces peak emissions

– Switching frequency: 200kHz to 2.2MHz

– Pin-configurable AUTO or FPWM operation

• Inherent protection features for robust design

– Internal hiccup-mode overcurrent protection

– Enable, power good, and thermal shutdown

– Internal or external loop compensation

• 6mm × 6mm thermally optimized, RoHS compliant,

QFN-29 package with Pb-free plating

• Create a custom design using the LM704A0-Q1

with the WEBENCH® Power Designer

2 Applications

• Automotive electronic systems

• Advanced driver assist systems (ADAS)

• Infotainment and cluster

3 Description

The LM704A0-Q1 is a low-IQ, wide-VIN synchronous

buck converter designed for an input voltage range

of 4.5V to 45V and delivering up to 10A of output

current at fixed output voltages of 3.3V, 5V, 12V, or an

adjustable output.

The LM704A0-Q1 uses a peak current-mode control

architecture for easy loop compensation, fast transient

response, and excellent load and line regulation. A

pair of LM704A0-Q1 converters can be set up in an

interleaved mode (paralleled outputs) with accurate

current sharing for applications requiring up to 20A of

output current.

The LM704A0-Q1 features a unique Dual Random

Spread Spectrum (DRSS) function that combines

low-frequency triangular and high-frequency cycleby-

cycle random modulations for improved EMI

performance across a wide range of frequency bands.