# TPS543021DRLR (Component) ## Description Buck Switching Regulator IC Positive, Isolation Capable Adjustable 0.596V 1 Output 3A SOT-563, SOT-666 The TPS543021DRLR is a compact, integrated power regulator that converts a wide input voltage (typically from batteries or power rails) into a regulated lower output voltage with high efficiency. It includes internal power switches and control circuitry, simplifying power supply design and reducing external component count. Key Features Topology: Synchronous buck converter Input Voltage Range: ~4.5 V to 28 V Output Voltage: Adjustable (via external resistors) Output Current: Up to 3 A continuous Switching Frequency: ~500 kHz (fixed) Efficiency: High efficiency (up to ~90%+) Quiescent Current: Low, suitable for power-sensitive designs Protection Features: Overcurrent protection (OCP) Thermal shutdown Undervoltage lockout (UVLO) Package & Physical Info Package Type: SOT-563 / VSON (compact, no-lead package) Mounting: Surface Mount (SMT) Packaging: Tape & reel (DRLR suffix) #CommonPartsLibrary #IntegratedCircuit #PowerManagement #Voltage-regulator #Switching-regulator ## Component Details - **Owner:** adrian95 - **Created:** 4/24/2026 - **Last Updated:** 4/24/2026 - **Visibility:** Public - **Manufacturer Name:** Texas Instruments - **Package or Case Code:** SOT-5X3 (DRL) - **Part Type:** Buck Converter - **Datasheet URL:** https://www.ti.com/lit/ds/symlink/tps543021.pdf?ts=1769604993373&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS543021 - **License:** https://creativecommons.org/licenses/by/4.0/ - **Manufacturer Part Number:** TPS543021DRLR - **Used in:** 6 projects ## 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/tps543021drlr/texas-instruments.html?utm_currency=USD&region=nac) | N/A | N/A | | [Mouser](https://www.mouser.com/ProductDetail/Texas-Instruments/TPS543021DRLR?qs=bpu3f%2FCR1jx2hSJei8nZXA%3D%3D) | $1.57 | 0 | - **Part Type:** Other - **Manufacturer:** Texas Instruments - **MPN:** TPS543021DRLR - **Mount Type:** Surface Mount - **Package / Case Code:** SOT-666 - **Pin Count:** 6 ## Pins | Pin | Name | Type | |-----|------|------| | 1 | VIN | | | 2 | SW | | | 3 | GND | | | 4 | BOOT | | | 5 | EN | | | 6 | FB | | --- *Generated from [https://www.flux.ai/adrian95/tps543021drlr](https://www.flux.ai/adrian95/tps543021drlr)*