# LMR36503RFRPER (Component) ## Description Ultra-Low IQ Synchronous Buck DC-DC Converter – 300 mA synchronous step-down (buck) switching regulator for high-efficiency industrial, automotive, battery-powered, and embedded power applications. Operates from a 3 V to 65 V input voltage, provides an adjustable output voltage from 1.0 V to 65 V, and delivers up to 300 mA output current. Features 6 µA typical quiescent current, programmable switching frequency from 200 kHz to 2.2 MHz, 100% duty-cycle operation, synchronous rectification, Power Good (PG) output, enable input, soft-start, cycle-by-cycle current limiting, hiccup short-circuit protection, thermal shutdown, and undervoltage lockout (UVLO). Specified for operation over a −40°C to +150°C junction temperature range and housed in a 9-pin VQFN-HR (2 × 2 mm) wettable-flank package. #TexasInstruments #LMR36503RFRPER #LMR36503 #BuckConverter #SynchronousBuck #DCDCConverter #SwitchingRegulator #PowerManagement #UltraLowIQ #300mA #VQFN9 #EmbeddedSystems ## Component Details - **Owner:** silicon-yard - **Created:** 7/22/2026 - **Last Updated:** 7/22/2026 - **Visibility:** Public - **Symbol Style:** parametric-v1 - **Part Type:** Integrated Circuit - **Manufacturer Part Number:** LMR36503RFRPER - **Datasheet URL:** https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/8b7f97f240ebf817a7bc2c17dee1cff8c7648a07929f962bdf01abe83c8efb88.pdf - **Manufacturer Name:** Texas Instruments - **Used in:** 4 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/lmr36503rfrper/texas-instruments.html?utm_currency=USD&region=nac) | N/A | N/A | | [Mouser](https://www.mouser.com/en/ProductDetail/Texas-Instruments/LMR36503RFRPER?qs=pUKx8fyJudBEQXiE3oj1JQ%3D%3D) | $4.22 | 3.1K | - **Part Type:** Integrated Circuits - **Sub-Type:** Logic - **Manufacturer:** Texas Instruments - **MPN:** LMR36503RFRPER - **Package / Case Code:** VQFN - **Pin Count:** 13 - **Logic Function:** AND ## Pins | Pin | Name | Type | |-----|------|------| | 1 | RT_1 | | | 2 | PGOOD | | | 3 | EN/UVLO | | | 4 | VIN_1 | | | 5 | SW_1 | | | 6 | BOOT | | | 7 | VCC | | | 8 | FB_1 | | | 9 | GND | | | 10 | RT_2 | | | 11 | VIN_2 | | | 12 | SW_2 | | | 13 | FB_2 | | --- *Generated from [https://www.flux.ai/silicon-yard/lmr36503rfrper](https://www.flux.ai/silicon-yard/lmr36503rfrper)*