1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

• Built in clocking for stacking of converters

• Internal or external compensation

• Pin selectable output voltage 3.3V and 5V fixed or

adjustable from 0.8V to 0.9 × VIN

• Wide input voltage range: 3V to 36V

• ZEN 1 switcher technology

– Optimized for low EMI requirements

– Facilitates CISPR 25 Class 5 CISPR 11 Class

B compliance

– Enhanced HotRod™ QFN package with

symmetrical pinout

• Switching frequency from 300kHz to 2.2MHz

– Pin-configurable AUTO or FPWM operation

– Synchronizable with external clock

• Low minimum on time: 40ns (maximum)

– Enables 36V to 3.3V conversion at 2.2MHz

• High-efficiency and high power density

2 Applications

• Advanced driver assistance systems (ADAS)

• Automotive infotainment and cluster

• Hybrid, electric, and powertrain systems

• Medical imaging systems

• Test and measurement systems

• Wireless infrastructure systems

3 Description

The LM654B0-Q1 is a buck converter designed

for high efficiency, high power density, and low

EMI performance with ZEN switcher technology for

automotive applications. The converter operates over

a wide input voltage range of 3V to 36V with pin

selectable fixed output voltages of 3.3V and 5V or an

adjustable output.

The low EMI operation is enabled with minimized

loop inductance, optimized SW node slew-rate,

and dual-random spread spectrum (DRSS). The

DRSS significantly reduces peak emissions through

a combination of triangular and pseudo-random

modulation while keeping output voltage ripple very

low.

The current-mode control architecture with 32ns

typical minimum on-time allows high conversion ratios

at high frequencies, fast transient response, and

excellent load and line regulation.