component
LM2677S-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
markdownLM2677S-5.0
Texas Instruments · DC-DC Converters · TO-263-7
LM2677S-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 | VSW | output | Source pin of the internal high-side FET and the switching node, to be connected to the inductor and the cathode of the external diode; the switch voltage to ground is limited to -1 V up to VIN (DC), with brief negative pulses per the absolute maximum footnote. |
| 2 | VIN | power_in | Supply input to the collector of the high-side FET, which must connect to the power supply and input bypass capacitor CIN with the VIN-to-CIN-to-GND path kept as short as possible; the supply voltage range is 8 V to 40 V. |
| 3 | CB | input | Boot-strap capacitor connection for the high-side driver, which requires a high quality 100-nF capacitor connected from CB to VSW. |
| 4 | GND | power_in | Power ground pin to be connected to system ground, with the path to CIN kept as short as possible and the ground pins of CIN and COUT tied to it. |
| 5 | SYNC | input | Allows control of the switching clock frequency within the 280 kHz to 400 kHz external sync range; if left open-circuited the regulator switches at the internal oscillator frequency, typically 260 kHz. |
| 6 | FB | input | Feedback sense input, connected to the midpoint of the feedback divider to set VOUT for the ADJ version or directly to the output capacitor for fixed-output versions such as the 5.0 V part; the feedback pin voltage is rated -0.3 V to 14 V. |
| 7 | ON/OFF | input | Enable input where high or floating enables the regulator and low disables it into the roughly 50 µA standby state; the pin voltage is rated -0.1 V to 6 V. |
| 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:
LM2677S-5.0 - Footprint:
Package_TO_SOT_SMD:TO-263-7_TabPin8 - 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files:
lm2677s-5-0-etched.step/lm2677s-5-0-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2677s-5-0.step/lm2677s-5-0.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
67567c9c5d763168, retrieved 2026-10-08, tier: lcsc) - 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).