1 Features
• AEC-Q100 qualified for automotive applications:
– Device temperature grade 1: –40°C to +125°C
ambient operating temperature
• Synchronous CC-CV buck controller 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
to 7.5A in 50mA steps (8mΩ RSENSE), 2A to
30A in 200mA steps (2mΩ RSENSE)
– Output slew rate: 0.5mV/μs to 40mV/μs
– Adjustable cable drop compensation
– Output active discharge
• Compatible with TPS2674x-Q1 USB PD
controllers
• Designed for low EMI requirements
– Facilitates CISPR 25 Class 5 compliance
– ±8% dual-random spread spectrum
– 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
• IMON pin to monitor output current
• 3.5mm × 4.5mm QFN-19 package with wettable
flanks

2 Applications
• Automotive electronic systems
• Infotainment and cluster
• 48V Automotive USB charging
• Automotive Lighting

3 Description
The LM5192-Q1 is an 80V, high-efficiency,
synchronous buck controller with constant-current
constant-voltage (CC-CV) regulation and I2C
interface.
The current-mode control architecture with a 30ns
typical minimum on-time allows high conversion ratios
at high frequencies coupled with a 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 to 200mA 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 LM5192-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.
Additional features of the LM5192-Q1 include
programmable diode emulation for lower current
consumption at light-load conditions, open-drain nINT
flag for fault reporting and output monitoring, precision
enable input, monotonic start-up into prebiased
load, integrated dual input (VIN and VOUTF) VCC
supply regulator, and oversized VDDA regulator for
powering external loads, such as companion USB PD
controllers.