LP5907 Low-Noise LDO

@@ -0,0 +1,52 @@+# LP5907++**Texas Instruments** · Linear Regulator (LDO) · SOT-23-5++The LP5907 is a 250 mA low-dropout regulator designed for low output noise (6.5 uVrms) and high power-supply rejection. Its clean output makes it well suited to powering sensitive RF, PLL, ADC, and precision-analog circuits from a noisier rail, in a compact SOT-23-5.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | IN | power_in | Input voltage supply, 2.2V to 5.5V (abs max 6V). Connect a 1µF ceramic capacitor to GND at this pin for stability. |+| 2 | GND | power_in | Common ground reference for the device. All voltages are measured with respect to this pin. |+| 3 | EN | input | Enable input. VIH ≥ 1.2V enables the regulator; VIL ≤ 0.4V disables it and discharges VOUT to GND through an internal 230Ω pulldown. Has an internal 1MΩ pulldown to GND so the regulator defaults off if left floating. |+| 4 | N/C | unconnected | No internal electrical connection. May be left floating or tied to any potential. |+| 5 | OUT | power_out | Regulated output voltage (fixed factory option, 1.2V to 4.5V in 25mV steps), up to 250mA. Connect a ≥1µF low-ESR ceramic capacitor to GND. An internal 230Ω (typ) pulldown discharges VOUT when the regulator is disabled (VEN low). |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Ultra-low-noise LDO |+| Output current | 250 mA |+| Output noise | 6.5 uVrms (10 Hz to 100 kHz) |+| PSRR | 82 dB at 1 kHz |+| Dropout voltage | 120 mV at 150 mA |+| Input voltage | 2.2 V to 5.5 V |+| Operating temperature | -40 C to 125 C |++## Ordering variants++- `LP5907DBV`+- `LP5907DQN`+- `LP5907YKE`+- `LP5907YKG`+- `LP5907YKM`+- `LP5907YCR`++## CAD (KiCad official)++- Symbol: `lp5907.kicad_sym`+- Footprint: `lp5907.kicad_mod`+- 3D model: SOT-23-5 body from KiCad `Package_TO_SOT_SMD/SOT-23-5`.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lp5907.pdf) (52 pp, sha256 `f5deda2f0cd6f251`, 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).++[Datasheet PDF](docs/lp5907-datasheet.pdf)

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