# LMR51420XDDCR (Component) ## Description Synchronous Buck DC-DC Converter – 2 A synchronous step-down (buck) switching regulator for high-efficiency power conversion in industrial, automotive, and embedded applications. Operates from a 4.5 V to 36 V input voltage, provides an adjustable output voltage from 0.6 V to 34.2 V, and switches at a 500 kHz fixed frequency. Features 40 µA typical quiescent current, 100% duty-cycle operation, synchronous rectification, cycle-by-cycle current limiting, hiccup short-circuit protection, thermal shutdown, undervoltage lockout (UVLO), power-good output, and enable input. Operates over a −40°C to +150°C junction temperature range and is housed in a 6-pin SOT-23-THIN (DDC) package. #TexasInstruments #LMR51420 #LMR51420XDDCR #BuckConverter #DCDCConverter #SynchronousBuck #SwitchingRegulator #PowerManagement #2A #SIMPLESWITCHER #SOT236 #EmbeddedSystems ## Component Details - **Owner:** silicon-yard - **Created:** 7/20/2026 - **Last Updated:** 7/20/2026 - **Visibility:** Public - **Package or Case Code:** TO - **Manufacturer Name:** Texas Instruments - **Manufacturer Part Number:** LMR51420XDDCR - **Datasheet URL:** https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/c7e85e81a5768105ea8e441b5a5f9b629f91bc252454792f21ada32bcd5d88dc.pdf - **Symbol Style:** parametric-v1 - **Part Type:** Linear Regulator - **Used in:** 1 project ## Distributor Pricing (qty 1) *Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.* | Distributor | Unit Price (qty 1) | Stock | |------------|--------------------|-------| | [Arrow](https://www.arrow.com/en/products/lmr51420xddcr/texas-instruments.html?utm_currency=USD&region=nac) | $0.8849 | 1.9K | | [LCSC](https://www.lcsc.com/product-detail/C5246146.html) | $0.7887 | 11K | | [Mouser](https://www.mouser.com/en/ProductDetail/Texas-Instruments/LMR51420XDDCR?qs=vvQtp7zwQdN6fBqQU4azxw%3D%3D) | $1.28 | 11K | | [Verical](https://www.verical.com/pd/texas-instruments-dc-dc-converter-LMR51420XDDCR-11449455?utm_currency=USD) | N/A | N/A | - **Part Type:** Other - **Manufacturer:** Texas Instruments - **MPN:** LMR51420XDDCR - **Package / Case Code:** SOT-23-6 - **Pin Count:** 6 ## Pins | Pin | Name | Type | |-----|------|------| | 1 | GND | | | 2 | SW | | | 3 | VIN | | | 4 | FB | | | 5 | EN | | | 6 | CB | | --- *Generated from [https://www.flux.ai/silicon-yard/lmr51420xddcr](https://www.flux.ai/silicon-yard/lmr51420xddcr)*