component
1117-1.2
Public Made by Adomby adom
IDCHIP Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. 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
markdown1117-1.2
IDCHIP · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
1117-1.2 from IDCHIP, in a SOT-223. 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 | GND/ADJ | power_in | Ground pin for fixed-voltage versions; ADJ pin for adjustable versions, where the output is set by R1/R2 per VOUT = VREF x (1 + R2/R1) + IADJ x R2. |
| 2 | VOUT | power_out | Regulated output voltage; for the adjustable version the datasheet requires a tantalum output capacitor of at least 22 µF for stability. |
| 3 | VIN | power_in | Input supply pin, with an absolute maximum input voltage of 12 V and a minimum input-to-output headroom needed for regulation (1.2 V dropout at 1 A). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | IDCHIP |
| Package | SOT-223 |
| 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, 1.2V version (TJ=25°C) | VREF | 1.176 | 1.2 | 1.224 | V | IOUT=10mA, VIN=3.2V, TJ=25°C | 4 |
| Reference voltage, 1.2V version (full range) | VREF | 1.152 | 1.2 | 1.248 | V | 10mA≤IOUT≤1A, 3.0V≤VIN≤10V | 4 |
| Line regulation | Rline | 3 | 7 | mV | VINMIN≤VIN≤12V, VOUT=Fixed/Adj, IOUT=10mA | 4 | |
| Load regulation | Rload | 6 | 12 | mV | 10mA≤IOUT≤1A, VOUT=Fixed/Adj | 4 | |
| Dropout voltage | Vdrop | 1 | 1.2 | V | IOUT=100mA | 4 | |
| Dropout voltage | Vdrop | 1.05 | 1.25 | V | IOUT=500mA | 4 | |
| Dropout voltage | Vdrop | 1.1 | 1.3 | V | IOUT=1A | 4 | |
| Quiescent current | Iq | 5 | 10 | mA | 4.25V≤VIN≤6.5V | 4 | |
| Ripple rejection | PSRR | 60 | 75 | dB | fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP | 4 | |
| Current limit | Ilimit | 1 | 1.1 | 1.2 | A | 4 | |
| Input voltage (absolute maximum) | VIN | 12 | V | 3 | |||
| Lead temperature (soldering 5 s) | TLead | 260 | °C | Soldering 5 s | 3 | ||
| Operating junction temperature (absolute maximum) | TJ | 150 | °C | 3 | |||
| Storage temperature | TSTG | -65 | 150 | °C | 3 | ||
| ESD capability (minimum) | ESD | 2000 | V | 3 | |||
| Input voltage (recommended) | VIN | 12 | V | 3 | |||
| Operating junction temperature (recommended) | TJ | -40 | 125 | °C | 3 | ||
| Junction-to-ambient thermal resistance, SOT-223-3L (no heatsink) | θJA | 120 | °C/W | SOT-223-3L, no heatsink | 5 |
CAD (KiCad official)
- Symbol:
1117-1.2 - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
1117-1-2-etched.step/1117-1-2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1117-1-2.step/1117-1-2.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: IDCHIP datasheet (9 pp, sha256
72a89b3dbebefb63, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).