# TPS543521RQFR (Component) ## Description Buck Switching Regulator IC Positive Adjustable 0.6V 1 Output 5A 9-PowerVFQFN -40C ~ 150C (TJ) #CommonPartsLibrary #IntegratedCircuit #PowerManagement #Voltage-regulator #Switching-regulator ## Component Details - **Owner:** adrian95 - **Created:** 2/25/2026 - **Last Updated:** 2/25/2026 - **Visibility:** Public - **Part Type:** Integrated Circuit - **Datasheet URL:** https://www.ti.com/lit/ds/symlink/tps543521.pdf?ts=1750742514330&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS543521%253FkeyMatch%253DTPS543521RQFR%2526tisearch%253Duniversal_search%2526usecase%253DOPN-ALT - **Manufacturer Name:** Texas Instruments - **License:** https://creativecommons.org/licenses/by/4.0/ - **Integrated Circuit Type:** Power Management - **Manufacturer Part Number:** TPS543521RQFR - **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/tps543521rqfr/texas-instruments.html?utm_currency=USD&region=nac) | N/A | N/A | | [LCSC](https://www.lcsc.com/product-detail/C47002843.html) | $2.8134 | 53 | | [Mouser](https://www.mouser.com/en/ProductDetail/Texas-Instruments/TPS543521RQFR?qs=vOcB1WHNNXJsOM3kGPWgiQ%3D%3D) | $1.72 | 1.5K | - **Part Type:** Integrated Circuits - **Sub-Type:** Power Management - **Manufacturer:** Texas Instruments - **MPN:** TPS543521RQFR - **Pin Count:** 9 - **Logic Function:** AND ## Pins | Pin | Name | Type | |-----|------|------| | 1 | RT/SYNC | | | 2 | EN | | | 3 | FB | | | 4 | GND | | | 5 | VIN_1 | | | 6 | VIN_2 | | | 7 | MODE | | | 8 | SW | | | 9 | SS/PG | | --- *Generated from [https://www.flux.ai/adrian95/tps543521rqfr~4y](https://www.flux.ai/adrian95/tps543521rqfr~4y)*