TJ7660D

@@ -0,0 +1,50 @@+# TJ7660D++**HTC Korea TAEJIN Tech** · Charge Pumps · SOIC-8++TJ7660D from HTC Korea TAEJIN Tech, 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 | NC | unconnected | No internal connection. Leave floating or tie to a nearby copper pour for mechanical support only. |+| 2 | CAP+ | passive | Positive terminal of the external charge-pump 'flying' capacitor C1 (typ. 10 uF). Alternately switched between V+ and CAP- during the pump cycle to transfer charge to the reservoir capacitor. |+| 3 | GND | power_in | Device ground / 0 V reference for the input supply and the output reservoir capacitor return. |+| 4 | CAP- | passive | Negative terminal of the external charge-pump 'flying' capacitor C1. Alternately switched between GND (charge phase) and VOUT (transfer phase) by the internal N-channel MOS switches. |+| 5 | VOUT | power_out | Inverted supply output; delivers -V+ (approximately -1.5 V to -10 V) into the external reservoir capacitor C2 (typ. 10 uF to GND). Typical output source resistance is 60 Ohm (100 Ohm max) at IOUT = 20 mA, V+ = 5 V. |+| 6 | LV | input | Low-voltage operation mode select. Tie to GND to bypass the internal series regulator and improve operation for V+ in the 1.5 V - 3.5 V range. Must be left floating (open) for V+ >= 3.5 V (up to 10 V) to prevent device latchup. Absolute-max input current 20 uA for V+ > 3.5 V. |+| 7 | OSC | bidirectional | Internal RC-oscillator node. Nominal free-running frequency is ~10 kHz at V+ = 5 V with COSC = 0. Add an external capacitor to GND to lower the frequency, or drive with an external clock to override the internal oscillator. |+| 8 | V+ | power_in | Positive supply input, +1.5 V to +10 V (absolute-max +10.5 V). Also serves as the reference used by the level translator and internal voltage regulator. Typical supply current 100 uA (180 uA max) with no load. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HTC Korea TAEJIN Tech |+| Package | SOIC-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `TJ7660DD`+- `TJ7660DN`++## CAD (KiCad official)++- Symbol: `TJ7660D`+- 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:** [HTC Korea TAEJIN Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588879819031924736) (11 pp, sha256 `86054706302dec33`, retrieved 2026-08-17, tier: lcsc)+- **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).++[Datasheet PDF](docs/tj7660d-datasheet.pdf)

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