Texas Instruments LM5018MRX/NOPB

Mfr. Part

LM5018MRX/NOPB

Manufacturer

Luminary Micro / Texas Instruments

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Detailed Description

High-voltage synchronous buck DC-DC regulator with integrated power stage. Input 7.5V to 100V, single adjustable output 1.225V to 90V, up to 300mA load. Switching frequency adjustable up to 1MHz. Industrial temperature range -40°C to +125°C (TJ). 8-SO PowerPad package for improved thermal performance. RoHS3 compliant. Tape & Reel for automated assembly. Base product family LM5018.

Key Features

Wide input range: 7.5V to 100V

Single positive output, adjustable: 1.225V to 90V

Synchronous rectification for higher efficiency

Up to 300mA output current

Buck topology, step-down converter

Adjustable switching frequency up to 1MHz

Isolation-capable applications supported by suitable topologies

-40°C to +125°C junction temperature rating

Surface-mount 8-SO PowerPad for better heat dissipation

RoHS3 compliant

Key Advantages

Handles harsh, high-voltage environments (up to 100V) with a compact footprint

Synchronous design reduces losses and improves efficiency at light and heavy loads

Broad output voltage range simplifies reuse across multiple rails

Adjustable frequency helps optimize EMI, size, and efficiency for your design

Robust thermal design with PowerPad keeps the device cooler under load

Simple single-output solution reduces BOM and design complexity

Packaging

Type: 8-PowerSOIC (8-SO PowerPad), supplier device package: 8-SO PowerPad

Material: Molded epoxy package body; copper alloy leads with tin plating; exposed copper thermal pad on bottom

Size: 3.90mm body width (0.154"); compact, low-profile form factor

Mounting: Surface mount (SMT)

Pin configuration: 8 leads plus exposed PowerPad (consult datasheet for exact pin assignments)

Thermal characteristics: Junction temperature range -40°C to +125°C; PowerPad enhances heat spreading to PCB

Electrical properties (summary): VIN 7.5V–100V; VOUT 1.225V–90V adjustable; IOUT up to 300mA; synchronous rectifier; switching frequency adjustable to 1MHz; buck topology; single output

Supply format: Tape & Reel (TR) for high-volume production

Lifecycle

Active, in production, and not nearing discontinuation based on current industry status.

Equivalent or alternative models (selection, verify fit to your requirements):

LM5019 (Texas Instruments): 100V input, up to ~600mA synchronous buck; similar architecture; 8-SO PowerPad; for higher current

LM5017 (Texas Instruments): 100V input, up to ~600mA; supports Fly-Buck/isolated bias designs; high-voltage buck family

LM5168 (Texas Instruments): 100V input, 300mA synchronous buck; newer generation with improved light-load efficiency; compact packages

LM5164 (Texas Instruments): 6V–100V input, up to ~500mA synchronous buck; modern control and efficiency; 8-pin options

LM5009 (Texas Instruments): 100V input, ~150mA non-synchronous buck; simpler option for lower current

LM5008A (Texas Instruments): 100V input, ~100mA non-synchronous buck; very low-power rails

If none of these match, or if you need pin-to-pin or drop-in equivalents, please contact Y-IC via our website and our sales team will help you select the best option.

Key Application Areas

Industrial and factory automation 24V/36V/48V rails

PLCs, sensors, and distributed control systems

Telecom and networking 48V bias supplies

Battery-powered 12V/24V systems and transportation (verify AEC-Q needs)

Gate driver and analog/mixed-signal bias rails

Test and measurement, instrumentation

Building automation and smart grid devices

Isolated bias supplies using suitable topologies (isolation-capable)

Datasheet

Y-IC hosts the most authoritative datasheet for LM5018MRX/NOPB on our product page. We strongly recommend downloading it here to get pin details, electrical curves, layout guidance, and design equations.

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