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.