1 Features

• Designed for reliable and rugged applications

– Wide input voltage range of 6 V to 100 V

– –40°C to +125°C junction temperature range

– Fixed 3-ms internal soft-start timer

– Peak current-limit protection

– Input UVLO and thermal shutdown protection

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Optimized for ultra-low EMI requirements

– Meets CISPR 25 Class 5 standard

• Suited for scalable industrial power supplies

– Pin-to-pin compatible with the LM5163 and

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

(100 V, 3.5A)

– 50-ns low minimum on and off times

– Diode emulation for high light-load efficiency

– 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 using

WEBENCH® Power Designer

2 Applications

• Hybrid, electric, and powertrain systems

• Inverter and motor control

• Industrial transport

3 Description

The LM5012 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 ratios, enabling

the direct step-down from a 48-V nominal input to

low-voltage rails for reduced system complexity and

solution cost. The LM5012 operates during input

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

cycle if needed, making it an excellent choice for highperformance

industrial applications.

With integrated high-side power MOSFET, the

LM5012 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 include ultra-low IQ and a 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 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.