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HT317ARMZ

Public Made by Adom

by adom

HTCSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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HT317ARMZ

HTCSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2

HT317ARMZ from HTCSEMI, in a TO-252-2. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 ADJ/GND passive Adjustment pin; the R1/R2 divider that sets Vout = 1.25 V(1+R2/R1) + IADJ*R2 connects here, with IADJ typically 50 µA and 100 µA max.
2 OUTPUT power_out Regulated output, adjustable from 1.2 V to 37 V at more than 1.5 A; the heatsink tab is connected to this pin.
3 INPUT power_in Unregulated input; input-to-output differential Vi-Vo must not exceed 40 V.

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package TO-252-2
Category Power Management (PMIC)
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Line Regulation (TA=+25C), 3.0V<=Vi-Vo<=40V Regline 0.01 0.04 %/V TA=+25C; 3.0V<=Vi-Vo<=40V 3
Load Regulation (TJ=+25C), Vin<=5V row Regload 5 25 mV TJ=+25C; 10mA<=Io<=Imax; Vin 5V 3
Load Regulation (TJ=+25C), Vin>=5V row Regload 0.1 0.5 %/Vo TJ=+25C; 10mA<=Io<=Imax; Vin 5V 3
Thermal Regulation (TA=+25C) 0.03 0.07 %/W TA=+25C; 20 ms pulse 3
Adjustment Pin Current IAdj 50 100 uA 3
Adjustment Pin Current Change IAdj 0.2 5 uA 2.5V<=Vi-Vo<=40V; 10mA<=IL<=Imax; PD<=Pmax 3
Reference Voltage Vref 1.2 1.25 1.3 V 3.0V<=Vi-Vo<=40V; 10mA<=IL<=Imax; PD<=Pmax 3
Line Regulation (Note 3), 3.0V<=Vi-Vo<=40V Regline 0.02 0.07 %/V 3.0V<=Vi-Vo<=40V 3
Load Regulation (Note 3), Vin<=5V row Regload 20 70 mV 10mA<=Io<=Imax; Vin 5V 3
Load Regulation (Note 3), Vin>=5V row Regload 0.3 1.5 %/Vo 10mA<=Io<=Imax; Vin 5V 3
Minimum Load Current to Maintain Regulation (Vi-Vo=40V) ILmin 3.5 10 mA Vi-Vo=40V 3
Maximum Output Current, Vi-Vo<=15V, P<=20W Imax 1.5 2.2 A Vi-Vo<=15V; P<=20W 3
Maximum Output Current, Vi-Vo=40V, P<=20W Imax 0.15 0.4 A Vi-Vo=40V; P<=20W; TA=+25C 3
Long-Term Stability S 0.3 1 %/1.0k Hrs. Tj=Thigh (Note 6); TA=+25C for endpoint measurements 3
Maximum Input-Output Voltage Differential Vi - Vo 40 Vdc 2
Operating Junction Temperature Range TJ -40 150 C 2
Storage Junction Temperature Range Tstg -65 150 C 2
Temperature Stability Ts 0.7 Tlow<=Tj<=Thigh 3
Thermal Resistance Junction to Case RJC 5 C/W 3

CAD (KiCad official)

  • Symbol: HT317ARMZ
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2 (KiCad packages3D, STEP)
  • 3D model files: ht317armz-etched.step / ht317armz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht317armz.step / ht317armz.glb are the bare package body.

Provenance

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

  • Datasheet: HTCSEMI datasheet (7 pp, sha256 026e4c9137a13678, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF