component
HT1117AH-ADJ
Public Made by Adomby adom
HTCSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. 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
markdownHT1117AH-ADJ
HTCSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
HT1117AH-ADJ from HTCSEMI, in a SOT-89. 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 | Adjust/ground pin that sets the adjustable output through the external R1/R2 divider to the 1.25 V reference (Vref 1.238 V to 1.262 V), with adjust pin current typically 52 µA and at most 120 µA. |
| 2 | VOUT | power_out | Regulated output pin, also connected to the heatsink tab; the output capacitor must be at least 4.7 µF with ESR between 33 mΩ (typ) and 2.2 Ω for stability. |
| 3 | VIN | power_in | Unregulated input pin with a 20 V maximum input rating, which should be bypassed with a 10 µF capacitor placed directly across the input and ground terminals. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOT-89 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reference Voltage, Adjustable Output Devices (Vin-Vout = 2.0 V, Iout = 10 mA, TA = 25°C) | Vref | 1.238 | 1.25 | 1.262 | V | Vin-Vout = 2.0 V, Iout = 10 mA, TA = 25°C | 3 |
| Reference Voltage, Adjustable Output Devices (Vin-Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA) | Vref | 1.225 | 1.27 | V | Vin-Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA (Note 4) | 3 | |
| Line Regulation, Adjustable | Regline | 0.04 | 0.1 | % | Vin = 2.75 V to 16.25 V, Iout = 10 mA (Note 5) | 3 | |
| Load Regulation, Adjustable | Regline | 0.2 | 0.4 | % | Iout = 10 mA to 800 mA, Vin = 4.25 V (Note 5) | 3 | |
| Minimum Required Load Current for Regulation, Adjustable Output Devices | IL(min) | 0.8 | 5 | mA | Vin = 15 V | 3 | |
| Dropout Voltage (Iout = 100 mA) | Vin−Vout | 0.95 | 1.1 | V | Measured at Vout − 100 mV; Iout = 100 mA | 3 | |
| Dropout Voltage (Iout = 500 mA) | Vin−Vout | 1.01 | 1.15 | V | Measured at Vout − 100 mV; Iout = 500 mA | 3 | |
| Dropout Voltage (Iout = 800 mA) | Vin−Vout | 1.07 | 1.2 | V | Measured at Vout − 100 mV; Iout = 800 mA | 3 | |
| Output Current Limit | Iout | 1000 | 1500 | 2200 | mA | Vin−Vout = 5.0 V, TA = 25°C (Note 6) | 3 |
| Adjustment Pin Current | Iadj | 52 | 120 | µA | Vin = 11.25 V, Iout = 800 mA | 4 | |
| Adjust Pin Current Change | Iadj | 0.4 | 5 | µA | Vin−Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA | 4 | |
| Thermal Regulation | 0.01 | 0.1 | %/W | TA = 25°C, 30 ms Pulse | 4 | ||
| Ripple Rejection, Adjustable | RR | 67 | 73 | dB | Vin−Vout = 6.4 V, Iout = 500 mA, 10 Vpp 120 Hz Sinewave | 4 | |
| Input Voltage | Vin | 20 | V | 2 | |||
| Maximum Die Junction Temperature Range | TJ | -55 | 150 | °C | 2 | ||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Operating Ambient Temperature Range | TA | -40 | 125 | °C | 2 |
CAD (KiCad official)
- Symbol:
HT1117AH-ADJ - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
ht1117ah-adj-etched.step/ht1117ah-adj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht1117ah-adj.step/ht1117ah-adj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTCSEMI datasheet (16 pp, sha256
3729369ddb90e7c5, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).