Texas Instruments LM20145MHX/NOPB

Mfr. Part

LM20145MHX/NOPB

Manufacturer

Luminary Micro/Texas Instruments

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Detailed Description

5 A synchronous step-down (buck) DC-DC regulator from the PowerWise family. Operates from 2.95 V to 5.5 V input rails and generates an adjustable positive output from 0.8 V to 4.68 V. Switching frequency is settable from 260 kHz to 750 kHz for easy EMI and size optimization. Integrated high-side and low-side MOSFETs in a compact 16-HTSSOP (PowerTSSOP) with exposed pad for better thermal performance. Industrial junction temperature range -40°C to +125°C. RoHS3 compliant and NOPB (lead-free).

Key Features

5 A continuous output current

Synchronous rectification for high efficiency

2.95 V to 5.5 V input range (ideal from 3.3 V or 5 V rails)

Adjustable output 0.8 V to 4.68 V

Settable switching frequency 260 kHz to 750 kHz

Single positive output, buck topology

Surface-mount 16-HTSSOP PowerPAD package

PowerWise series for energy-efficient designs

-40°C to +125°C junction operating range

RoHS3 compliant, NOPB lead finish

Typical system functions available such as enable, soft-start, and protection features (UVLO, current limit, thermal shutdown). See datasheet for details.

Key Advantages

High efficiency across a wide load range due to synchronous design

Small solution size with integrated MOSFETs and compact package

Flexible design via wide output range and adjustable frequency

Fewer external parts and lower BOM cost than controller + external FET approaches

Easier EMI tuning by selecting the switching frequency

Strong reliability with built-in protection features

Packaging

Shipment type: Tape & Reel (TR) for automated SMT

Device package/case: 16-PowerTSSOP (16-HTSSOP), 0.173 inch (4.40 mm) body width, exposed thermal pad

Mounting: Surface Mount

Materials: Molded epoxy body, copper leadframe, matte tin lead finish (lead-free, NOPB)

Pin configuration: 16 leads plus exposed pad; standard TSSOP-style lead pitch; exposed pad should be soldered to a grounded thermal land for best heat and electrical performance (follow the datasheet land pattern)

Thermal characteristics: Enhanced heat spreading via PowerPAD; junction operating range -40°C to +125°C; actual thermal resistance depends on PCB layout and airflow. See datasheet for RθJA/RθJC and derating guidelines.

Electrical properties related to packaging: RoHS3 compliant; moisture sensitivity and reflow per JEDEC J-STD-020. Follow proper storage and handling.

Lifecycle

Current status: No public end-of-life notice from the manufacturer is known at the time of writing. Availability can vary by region and time. Check the live status on our product page or contact Y-IC for confirmation.

Equivalent or alternative models (functional alternatives; not necessarily pin-compatible)

- Texas Instruments TPS54540: 5 A buck, wider input range

- Texas Instruments TPS54620: 6 A synchronous buck, similar function

- Texas Instruments TPS565201: 5 A synchronous buck, newer generation

- Texas Instruments LM2678: 5 A buck, non-synchronous, wider Vin

- Texas Instruments TPS54320/TPS54360: 3 A class if lower current is acceptable

- Family-related option: LM20144 (lower-current member of the PowerWise family)

Need a drop-in, pin-compatible, or automotive-grade option? Contact Y-IC sales via our website. We will recommend the closest match and provide migration support.

Key Application Areas

Point-of-load converters from 5 V or 3.3 V intermediate rails

FPGA, DSP, MCU, and ASIC core/I-O supplies

Networking and telecom equipment (switches, routers, access points)

Industrial control and factory automation

Test and measurement equipment

Storage and computing peripherals (SSDs, HDD controllers, DDR rails)

Consumer and embedded systems needing compact, efficient 5 A regulation

Datasheet

Y-IC provides the most authoritative, up-to-date datasheet for LM20145MHX/NOPB on this product page. Download it here for full electrical specs, design equations, layout and thermal guidance, and application examples.

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