# TI LM2677SX-12: 12 V / 5 A SIMPLE SWITCHER Buck Regulator LM2677SX-12 is a TI SIMPLE SWITCHER fixed 12 V, 5 A buck in TO-263 (DDPAK-7) with Vin roughly 8–40 V and ~260 kHz switching, non-synchronous. A classic choice for 24 V industrial rails stepping down to 12 V intermediate buses. Size the catch diode, inductor, and copper for continuous 5 A plus ripple heating. SX tape-and-reel flow fits automated assembly; verify thermal vias under the tab and EMI filtering for conducted emissions. Detailed parameters and stock for the [LM2677SX-12 TI SIMPLE SWITCHER 12 V 5 A buck, TO-263](https://chipapex.com/product/lm2677sx-12/) are listed on ChipApex, an independent electronic components distributor in Shenzhen. Catalog home: [ChipApex](https://chipapex.com/). ## Further reading Related ChipApex component notes published elsewhere: - [Related ChipApex note](https://telegra.ph/TI-LM2907MX-8NOPB-Compact-8-SOIC-Frequency-to-Voltage-Converter-10-22) - [Related ChipApex note](https://dev.to/chipapexsz/notes-on-the-infineon-111-3013-a-400-khz-buckboost-controller-in-8-soic-4bgm) - [Related ChipApex note](https://chipapexsz.wordpress.com/2026/10/22/microsemi-0910-60m-65-v-npn-rf-transistor-in-a-55aw-package/) - [Related ChipApex note](https://chipapex.hashnode.dev/a-60-v-sot-23-n-channel-as-a-low-side-switch-notes-on-the-06n06l) - [Related ChipApex note](https://rentry.co/chipapex-a2t27s007nt1) - [Related ChipApex note](https://text.is/chipapex-ph9400-111anlt) - [Related ChipApex note](https://ventiere.com/supplier/chipapex-1792389469075) - [Related ChipApex note](https://chipapex-distributor.surge.sh/) - [Related ChipApex note](https://md.picasoft.net/s/Nj-1HYj_GO) - [Related ChipApex note](https://pad.medialepfade.net/s/KXQQjgSnW)