TD1509P5 R

@@ -0,0 +1,52 @@+# TD1509P5 R++**Techcode** · DC-DC Converters · SOP-8++TD1509P5 R from Techcode, in a SOP-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 | VIN | power_in | Input supply voltage. Operating range 3.6V to 45V; absolute max 45V. Bypass locally with a low-ESR input capacitor to keep switching current loops tight. |+| 2 | OUTPUT | output | Switching output (emitter of the internal high-side power transistor). Connects to the external catch diode's cathode and the inductor. Saturation voltage typically 1.2V at Iout=3A; internal current limit ~4.2A peak. |+| 3 | FB | input | Output voltage feedback input to the internal error amplifier. Internal reference 1.235V (adjustable version). For fixed 5V version the divider is internal (R1=2.49k, R2=7.57k) so FB is typically tied to VOUT. Feedback bias current typically 10 nA. |+| 4 | ON/OFF | input | TTL-compatible shutdown control. Regulator is ON when this pin is Low (VIL ≤ 0.6V typ) or left floating; regulator is OFF when High (VIH ≥ 2.0V). Absolute max range -0.3V to Vin+0.3V. Standby current typically 80 µA when disabled. |+| 5 | GND | power_in | Ground. Pins 5-8 are all tied to ground internally and should all be connected to the ground plane; the paired pins also aid heat sinking of the die. |+| 6 | GND | power_in | Ground. Pins 5-8 are all tied to ground internally and should all be connected to the ground plane; the paired pins also aid heat sinking of the die. |+| 7 | GND | power_in | Ground. Pins 5-8 are all tied to ground internally and should all be connected to the ground plane; the paired pins also aid heat sinking of the die. |+| 8 | GND | power_in | Ground. Pins 5-8 are all tied to ground internally and should all be connected to the ground plane; the paired pins also aid heat sinking of the die. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Techcode |+| Package | SOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `TD1509P5 RP5`+- `TD1509P5 RP3`+- `TD1509P5 RPR`+- `TD1509P5 RD5`+- `TD1509P5 RD3`+- `TD1509P5 RDR`++## CAD (KiCad official)++- Symbol: `TD1509P5 R`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Techcode datasheet](docs/td1509p5-r-datasheet.pdf) (17 pp, sha256 `8d1cdb542e62ec93`, 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/td1509p5-r-datasheet.pdf)

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