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HT317ARDZ

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by Ray

HTCSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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HT317ARDZ

HTCSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

HT317ARDZ from HTCSEMI, in a SOT-223. 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 ADJ input Adjustment pin. Sink pin for the resistor divider that programs Vout via Vout = 1.25 V * (1 + R2/R1) + IADJ*R2. IADJ is typically 50 uA (100 uA max). A bypass Cadj to GND improves ripple rejection to ~80 dB.
2 OUTPUT power_out Regulated positive output, adjustable 1.2 V to 37 V, capable of >1.5 A (typ 2.2 A at Vi-Vo <= 15 V, P <= 20 W). Also tied to the SOT-223 heatsink tab. A 1 uF output capacitor is recommended for transient response.
3 INPUT power_in Unregulated positive input supply. Input-to-output differential (Vi - Vo) must be kept between roughly 3 V and 40 V (absolute max). A 0.1 uF input capacitor is required if the regulator is located far from the supply filter.

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package SOT-223
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • HT317ARDZ
  • HT317ARDZATZ
  • HT317ARDZARMZ
  • HT317ARDZARSZ
  • HT317ARDZATFZ
  • HT317ARDZAREZ

CAD (KiCad official)

  • Symbol: HT317ARDZ
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HTCSEMI datasheet (9 pp, sha256 75112b57f0b8c7b8, 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