component
LM2670SX-5.0
Public Made by Adomby adom
Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM2670SX-5.0
Texas Instruments · DC-DC Converters · TO-263-7
LM2670SX-5.0 from Texas Instruments, in a TO-263-7. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Switch_output | output | Source of the internal high-side FET and the switching node; connect it to the inductor and to the cathode of the external Schottky catch diode, and the pin must not be driven more than 1V below ground. |
| 2 | Input | input | Power input that feeds the high-side FET and biases the internal circuits; it must be kept within 8V to 40V and bypassed close to this pin with an input capacitor. |
| 3 | CBOOST/CB | input | Bootstrap capacitor connection that drives the high-side MOSFET gate above VIN; the datasheet specifies a 100nF quality capacitor between CB and the SW pin in the pin table, while Sections 6.3.3 and 7.1.6 recommend 0.01µF. |
| 4 | GND | power_in | Power ground reference for the regulator and the ground return of CIN and COUT, which should be kept as short as practical to CIN and connected to system ground. |
| 5 | SYNC | input | Synchronization input that locks the switching frequency to an external clock between 280kHz and 400kHz, which must be higher than the internal oscillator frequency; if left open the regulator runs at its internal 225kHz to 280kHz oscillator. |
| 6 | Feedback/FB | input | Feedback sense input that sets the DC output voltage, connected to the feedback divider midpoint for the ADJ version or directly to the output for fixed-output versions such as the 5.0V part. |
| 7 | ON/OFF | input | Regulator enable input where a high level turns the regulator on and pulling it below 0.8V fully shuts it down, and it must not exceed the 6V absolute maximum when electrically driven high. |
| 8 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TO-263-7 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM2670SX-5.0 - Footprint:
Package_TO_SOT_SMD:TO-263-7_TabPin8 - 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files:
lm2670sx-5-0-etched.step/lm2670sx-5-0-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2670sx-5-0.step/lm2670sx-5-0.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (42 pp, sha256
0dc7dd45c243f2c8, retrieved 2026-10-12, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).