component
LMC7660IMX
Public Unreviewedby Ray
Texas Instruments DC-DC Converters, SOIC-8. Datasheet-verified pinout, 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
markdownLMC7660IMX
Texas Instruments · DC-DC Converters · SOIC-8
LMC7660IMX from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | N/C | unconnected | No internal connection. Leave floating or tie to a convenient net; carries no signal. |
| 2 | Cap+ | passive | Positive terminal of the flying (pump) capacitor Cp. Internally switched between V+ and Vout by the S1/S2 MOS switches to shuttle charge from the input to the output reservoir. Typically 10 uF electrolytic to pin 4 (Cap-). |
| 3 | Gnd | power_in | Device ground reference (0 V). Return for the input supply, oscillator, and internal logic; also the reference for the negative Vout. |
| 4 | Cap- | passive | Negative terminal of the flying (pump) capacitor Cp. Internally switched between Gnd and Vout by the S3/S4 MOS switches during the charge-pump cycle. Typically 10 uF electrolytic to pin 2 (Cap+). |
| 5 | Vout | power_out | Negative charge-pump output, nominally -V+ (e.g. -5V from a +5V input) into a light load. Bypass to Gnd with a 10 uF reservoir capacitor Cr. Typical output source resistance 55 Ω at IL = 20 mA (100 Ω max). |
| 6 | LV | input | Low-Voltage operation control. Tie to Gnd when operating below V+ ≈ 3.5 V to bypass the internal regulator and improve low-voltage performance; leave open (floating) for V+ ≥ 3.5 V. Input current into pin 6 is limited to 20 uA max. |
| 7 | Osc | bidirectional | Oscillator node. Free-running internal oscillator ~10 kHz at 25 °C. May be pulled down with an external Cosc to lower the switching frequency, or over-driven by an external clock (sink/source current 3 uA typical). |
| 8 | V+ | power_in | Positive supply input, +1.5 V to +10 V operating range (10.5 V absolute max). Powers the internal oscillator, level translator, and charge-pump MOS switches. Supply current 120 uA typical (200 uA max) with no load. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
LMC7660IMXLMC7660IMXIN
CAD (KiCad official)
- Symbol:
LMC7660IMX - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (19 pp, sha256
fd99625337f03a10, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).