component
HT317ARMZ
Public Made by Adomby 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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHT317ARMZ
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht317armz.step/ht317armz.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).