# L3751PUR (Component)
## Description
Buck Regulator Positive Output Step-Down DC-DC Controller IC 20-QFN (3.5x4.5) #CommonPartsLibrary #IntegratedCircuit #PowerManagement #Switching-controller #L3751
## Component Details
- **Owner:** adrian95
- **Created:** 6/23/2025
- **Last Updated:** 6/23/2025
- **Visibility:** Public
- **Datasheet URL:** https://www.st.com/resource/en/datasheet/l3751.pdf
- **Manufacturer Part Number:** L3751PUR
- **License:** https://creativecommons.org/licenses/by/4.0/
- **Package or Case Code:** L3751PUR
- **Manufacturer Name:** STMicroelectronics
- **Part Type:** Integrated Circuit
- **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/l3751pur/stmicroelectronics.html?utm_currency=USD®ion=europe) | $1.323 | 60K |
| [LCSC](https://www.lcsc.com/product-detail/C5268070.html) | $4.2185 | 10 |
| [Mouser](https://www.mouser.com/ProductDetail/STMicroelectronics/L3751PUR?qs=tlsG%2FOw5FFigxiT6z1V%252B%252Bw%3D%3D) | $2.67 | 873 |
| [Verical](https://www.verical.com/pd/stmicroelectronics-dc-to-dc-controller-L3751PUR-11433792?utm_currency=USD) | N/A | N/A |
- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** STMicroelectronics
- **MPN:** L3751PUR
- **Package / Case Code:** 20-QFN
- **Pin Count:** 21
- **Logic Function:** AND
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | EN/UVLO | |
| 2 | RT | |
| 3 | SS/TRK | |
| 4 | COMP | |
| 5 | FB | |
| 6 | AGND | |
| 7 | SYNCOUT | |
| 8 | SYNCIN | |
| 9 | NC_1 | |
| 10 | PGOOD | |
| 11 | ILIM | |
| 12 | PGND | |
| 13 | LO | |
| 14 | VCC | |
| 15 | EP_1 | |
| 16 | NC_2 | |
| 17 | BST | |
| 18 | HO | |
| 19 | SW | |
| 20 | VIN | |
| 21 | EP_2 | |
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*Generated from [https://www.flux.ai/adrian95/l3751pur~3at](https://www.flux.ai/adrian95/l3751pur~3at)*