1 Features

• AEC-Q100 qualified for automotive applications:

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

ambient operating temperature

• Synchronous DC/DC converter with a versatile

buck controller and robust power MOSFETs

– Wide input voltage range: 4.5 V to 80 V

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

adjustable outputs from 0.8 V to 55 V

– Dual-phase control enables paralleling two

devices for higher current applications

– Shutdown mode current: 2.3 μA

– No-load sleep current: 6.5 μA

• Optimized for low EMI requirements

– Facilitates CISPR 25 Class 5 compliance

– Pin-selectable ±8% dual-random spread

spectrum reduces peak emissions

– Switching frequency: 200 kHz to 2.2 MHz

– 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

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

compliant, QFN-29 package with Pb-Free plating

2 Applications

• Industrial: motor drives (Servo/AC), factory

automation, off-highway vehicles and eBikes

• Communications: WLAN, AAS and RRU

• Automotive: ADAS, infotainment and cluster

3 Description

The LM70880-Q1 is a compact, easy-to-use, 4.5-V

to 80-V, ultra-low IQ, synchronous step-down DC/DC

converter featuring a versatile buck controller and a

pair of power MOSFETs designed for delivering of up

to 8 A of output current at fixed output voltages of 3.3

V, 5 V, 12 V, or an adjustable output.

The converter uses a peak current-mode control

architecture for easy loop compensation, fast transient

response, and excellent load and line regulation. A

pair of LM70880-Q1 converters can be set up in an

interleaved mode (paralleled outputs) with accurate

current sharing for applications requiring up to 16 A of

output current.

The LM70880-Q1 features a unique Dual Random

Spread Spectrum (DRSS) function that combines

a low-frequency triangular modulation with a highfrequency

cycle-by-cycle random modulation for

improved EMI performance across a high range of

radio frequency bands.