1 Features

• AEC-Q100-qualified for automotive applications

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

ambient temperature range

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Designed for reliable and rugged applications

– Wide input voltage range of 6 V to 100 V

– –40°C to +150°C junction temperature range

– Fixed 3.5-ms internal soft-start timer

– Peak current-limit protection

– Input UVLO and thermal shutdown protection

• Optimized for ultra-low EMI requirements

– Meets CISPR 25 Class 5 standard

• Suited for scalable automotive power supplies

– Pin-to-pin compatible with the LM5163-Q1

LM5164-Q1 (100 V, 0.5 A or 1 A), and LM5013-

Q1 (100 V, 3.5 A)

– 50-ns low minimum on times and off times

– 10-μA no-load sleep current

– 3.1-μA shutdown quiescent current

• Integration reduces solution size and cost

– COT mode control architecture

– Integrated 100-V, 0.25-Ω power MOSFET

– 1.2-V internal voltage reference

– No loop compensation components

– Internal VCC bias regulator and boot diode

• Create a custom regulator design with the

LM5013-Q1 using WEBENCH® Power Designer

2 Applications

• Hybrid, electric, and powertrain systems

• Inverter and motor control

• 48-V to 12-V DC/DC converter

3 Description

The LM5012-Q1 non-synchronous buck converter is

designed to regulate over a wide input voltage range,

minimizing the need for external surge suppression

components. A minimum controllable on time of 50 ns

facilitates large step-down conversion ratio, enabling

the direct step-down for 48 -V nominal input to lowvoltage

rails for reduced systems complexity and

solution cost. The LM5012-Q1 operates during input

voltage dips as low as 6 V, at nearly 100 duty

cycle if needed, making it an excellent choice for highperformance

48-V battery automotive application and

MHEV/EV systems.

With an integrated high-side power MOSFET, the

LM5012-Q1 delivers up to 2.5 A of output current. A

constant on-time (COT) control architecture provides

nearly constant switching frequency with excellent

load and line transient response. Additional features

of the LM5012-Q1 include ultra-low IQ operation for

high light-load efficiency, innovative peak overcurrent

protection, integrated VCC bias supply and bootstrap

diode, precision enable and input UVLO, and thermal

shutdown protection with automatic recovery. An

open-drain PGOOD indicator provides sequencing,

fault reporting, and output voltage monitoring.

The LM5012-Q1 2.5 A is qualified to automotive

AEC-Q100 grade 1 and is available in a 8-pin SO

PowerPAD™ integrated circuit package. The device

1.27-mm pin pitch provides adequate spacing for

high-voltage applications.