1 Features

• AEC-Q100 qualified for automotive applications:

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

ambient operating temperature

• Synchronous CC-CV buck converter with I2C

– Wide input voltage range: 4.5V to 80V

• Meets LV148 / ISO21780 requirements

– 1% accurate, programmable VOUT from 1V

(3.3V) to 24V (48V) in 10mV (20mV) steps

– 3% accurate, programmable ILIM(avg) from 0.5A

(0.8A) to 7.5A (12A) in 50mA (80mA) steps

– Output slew rate: 0.5mV/μs to 40mV/μs

– Adjustable cable drop compensation

– Output active discharge

• Designed for pairing with TPS2674X-Q1 USB

Type-C PD controllers

• Designed for low EMI requirements

– Facilitates CISPR 25 Class 5 compliance

– ±8% dual-random spread spectrum with

programmable modulation frequency

– Programmable fSW: 200kHz to 2.2MHz

– Programmable PFM or FPWM operation

• Programmable protection features

– UV/OV (PG) warning: ±5% or ±10%

– OVP warning, fault: 5% to 36% in 1% steps

– Internal hiccup-mode overcurrent protection

– Enable, interrupt, and thermal shutdown

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

QFN-29 package with Pb-free plating

2 Applications

• Automotive electronic systems

• Infotainment and cluster

• Automotive USB charging

3 Description

The LM72880-Q1 is an 80V, ultra-low IQ, synchronous

buck converter with constant-current constant-voltage

(CC-CV) regulation and I2C interface. The device is

designed to work with the TPS2674X-Q1 USB Type-C

PD controllers.

The converter uses a peak current-mode control

architecture for easy loop compensation, fast transient

response, and excellent load and line regulation. The

highly accurate CC-CV operation enables seamless

transition between constant-current and constantvoltage

modes. The I2C interface allows programming

of output voltage in 10mV or 20mV steps, average

output current limit in 50mA steps, as well as output

voltage slew rate, switching frequency, soft-start slew

rate, mode of operation, current loop compensation,

output active discharge strength, and cable drop

compensation gain.

The LM72880-Q1 also features an array of safety

features including undervoltage and overvoltage

protection with programmable thresholds, overcurrent

protection with programmable hiccup mode, and

thermal shutdown.