component
AP2127K-4.2TRG1
Public Made by Adomby adom
Diodes Incorporated Linear Voltage Regulators (LDO), SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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AP2127K-4.2TRG1
Diodes Incorporated · Linear Voltage Regulators (LDO) · SOT-23-5
AP2127K-4.2TRG1 from Diodes Incorporated, in a SOT-23-5. 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 | VIN | power_in | Power input; recommended operating input voltage 2.5V to 6V (absolute maximum 6.5V), decoupled with a 1µF ceramic capacitor to GND placed close to the device. |
| 2 | GND | power_in | Ground. |
| 3 | Shutdown | input | Enable input; high level at least 1.5V enables, low level at most 0.5V shuts down the output (with 60Ω typical auto-discharge MOSFET), and has an internal 3MΩ typical pull-down resistance. |
| 4 | NC/ADJ | unconnected | No connection on fixed-voltage versions such as the 4.2V AP2127K-4.2; on the adjustable version it is the VOUT feedback input for the resistor divider. |
| 5 | VOUT | power_out | Regulated power output (4.2V fixed for this part, ±2% accuracy, up to 300mA), requiring a 1µF or larger ceramic output capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23-5 |
| Category | Power Management ICs |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage | VOUT | 98 | 102 | % of VOUT | VIN = VOUT +1V, 1mA ≤ IOUT ≤ 300mA | 5 | |
| Input Voltage | VIN | 2.5 | 6 | V | 5 | ||
| Maximum Output Current | IOUT(MAX) | 300 | 400 | mA | VIN - VOUT = 1V, VOUT = 0.98 x VOUT | 5 | |
| Load Regulation | ΔVOUT | 4 | 10 | mV | VIN - VOUT = 1V, 1mA ≤ IOUT ≤ 300mA | 5 | |
| Line Regulation | ΔVOUT | 0.5 | 5 | mV | VOUT + 0.5V ≤ VIN ≤ 6V, IOUT = 30mA | 5 | |
| Dropout Voltage | VDROP | 170 | 300 | mV | VOUT = 2.5V, 2.8V, 3.0V, 3.3V, 4.2V, IOUT = 300mA | 5 | |
| Quiescent Current | IQ | 60 | 90 | µA | VIN = VOUT +1V, IOUT = 0mA | 5 | |
| Standby Current | ISTD | 0.1 | 1 | µA | VIN = VOUT +1V, VSHUTDOWN in off mode | 5 | |
| Shutdown High Voltage | 1.5 | V | Shutdown Input Voltage High | 5 | |||
| Shutdown Low Voltage | 0.5 | V | Shutdown Input Voltage Low | 5 | |||
| Input Voltage | VIN | 2.5 | 6 | V | @TA = +25°C | 4 | |
| Operating Ambient Temperature Range | TA | -40 | 85 | °C | @TA = +25°C | 4 | |
| Input Voltage | VIN | 6.5 | V | @TA = +25°C | 4 | ||
| Output Current | IOUT | 450 | mA | @TA = +25°C | 4 | ||
| Junction Temperature | TJ | 150 | °C | @TA = +25°C | 4 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 4 | ||
| Lead Temperature | TLEAD | 260 | °C | Soldering, 10sec | 4 | ||
| ESD Human Body Model | ESD | 6000 | V | 4 | |||
| ESD Machine Model | ESD | 200 | V | 4 | |||
| Thermal Resistance Junction to Ambient | θJA | 250 | °C/W | SOT-23-5 | 4 | ||
| Thermal Resistance Junction to Case | θJC | 150 | °C/W | SOT-23-5 | 5 | ||
| Reference Voltage | VREF | 0.784 | 0.8 | 0.816 | V | VIN = VOUT +1V, 1mA ≤ IOUT ≤ 300mA | 5 |
| Output Voltage Temperature Coefficient | ΔVOUT/VOUT/ΔT | 100 | ppm/°C | IOUT = 30mA, -40°C ≤ TA ≤ +85°C (printed ±100) | 5 | ||
| Short Current Limit | ISHORT | 50 | mA | VOUT = 0V | 5 | ||
| Soft Start Time | tSS | 50 | µs | 5 | |||
| Power Supply Rejection | PSRR | 68 | dB | AP2127-1.0V to 4.2V, Ripple 1VP-P, VIN = VOUT +1V, f = 1kHz | 5 | ||
| Discharge MOSFET RDS(ON) | RDS(ON) | 60 | Ω | Shutdown Input Voltage Low | 5 | ||
| Thermal Shutdown | 165 | °C | 5 |
CAD (KiCad official)
- Symbol:
AP2127K-4.2TRG1 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
ap2127k-4-2trg1-etched.step/ap2127k-4-2trg1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ap2127k-4-2trg1.step/ap2127k-4-2trg1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (24 pp, sha256
d48c96ac985d348a, retrieved 2026-10-23, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).
# AP2127K-4.2TRG1
**Diodes Incorporated** · Linear Voltage Regulators (LDO) · SOT-23-5
AP2127K-4.2TRG1 from Diodes Incorporated, in a SOT-23-5. 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 | VIN | power_in | Power input; recommended operating input voltage 2.5V to 6V (absolute maximum 6.5V), decoupled with a 1µF ceramic capacitor to GND placed close to the device. |
| 2 | GND | power_in | Ground. |
| 3 | Shutdown | input | Enable input; high level at least 1.5V enables, low level at most 0.5V shuts down the output (with 60Ω typical auto-discharge MOSFET), and has an internal 3MΩ typical pull-down resistance. |
| 4 | NC/ADJ | unconnected | No connection on fixed-voltage versions such as the 4.2V AP2127K-4.2; on the adjustable version it is the VOUT feedback input for the resistor divider. |
| 5 | VOUT | power_out | Regulated power output (4.2V fixed for this part, ±2% accuracy, up to 300mA), requiring a 1µF or larger ceramic output capacitor. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23-5 |
| Category | Power Management ICs |
| Pins | 5 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage | VOUT | 98 | | 102 | % of VOUT | VIN = VOUT +1V, 1mA ≤ IOUT ≤ 300mA | 5 |
| Input Voltage | VIN | 2.5 | | 6 | V | | 5 |
| Maximum Output Current | IOUT(MAX) | 300 | 400 | | mA | VIN - VOUT = 1V, VOUT = 0.98 x VOUT | 5 |
| Load Regulation | ΔVOUT | | 4 | 10 | mV | VIN - VOUT = 1V, 1mA ≤ IOUT ≤ 300mA | 5 |
| Line Regulation | ΔVOUT | | 0.5 | 5 | mV | VOUT + 0.5V ≤ VIN ≤ 6V, IOUT = 30mA | 5 |
| Dropout Voltage | VDROP | | 170 | 300 | mV | VOUT = 2.5V, 2.8V, 3.0V, 3.3V, 4.2V, IOUT = 300mA | 5 |
| Quiescent Current | IQ | | 60 | 90 | µA | VIN = VOUT +1V, IOUT = 0mA | 5 |
| Standby Current | ISTD | | 0.1 | 1 | µA | VIN = VOUT +1V, VSHUTDOWN in off mode | 5 |
| Shutdown High Voltage | | 1.5 | | | V | Shutdown Input Voltage High | 5 |
| Shutdown Low Voltage | | | | 0.5 | V | Shutdown Input Voltage Low | 5 |
| Input Voltage | VIN | 2.5 | | 6 | V | @TA = +25°C | 4 |
| Operating Ambient Temperature Range | TA | -40 | | 85 | °C | @TA = +25°C | 4 |
| Input Voltage | VIN | | | 6.5 | V | @TA = +25°C | 4 |
| Output Current | IOUT | | | 450 | mA | @TA = +25°C | 4 |
| Junction Temperature | TJ | | | 150 | °C | @TA = +25°C | 4 |
| Storage Temperature Range | TSTG | -65 | | 150 | °C | | 4 |
| Lead Temperature | TLEAD | | | 260 | °C | Soldering, 10sec | 4 |
| ESD Human Body Model | ESD | | | 6000 | V | | 4 |
| ESD Machine Model | ESD | | | 200 | V | | 4 |
| Thermal Resistance Junction to Ambient | θJA | | | 250 | °C/W | SOT-23-5 | 4 |
| Thermal Resistance Junction to Case | θJC | | 150 | | °C/W | SOT-23-5 | 5 |
| Reference Voltage | VREF | 0.784 | 0.8 | 0.816 | V | VIN = VOUT +1V, 1mA ≤ IOUT ≤ 300mA | 5 |
| Output Voltage Temperature Coefficient | ΔVOUT/VOUT/ΔT | | 100 | | ppm/°C | IOUT = 30mA, -40°C ≤ TA ≤ +85°C (printed ±100) | 5 |
| Short Current Limit | ISHORT | | 50 | | mA | VOUT = 0V | 5 |
| Soft Start Time | tSS | | 50 | | µs | | 5 |
| Power Supply Rejection | PSRR | | 68 | | dB | AP2127-1.0V to 4.2V, Ripple 1VP-P, VIN = VOUT +1V, f = 1kHz | 5 |
| Discharge MOSFET RDS(ON) | RDS(ON) | | 60 | | Ω | Shutdown Input Voltage Low | 5 |
| Thermal Shutdown | | | 165 | | °C | | 5 |
## CAD (KiCad official)
- Symbol: `AP2127K-4.2TRG1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `ap2127k-4-2trg1-etched.step` / `ap2127k-4-2trg1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap2127k-4-2trg1.step` / `ap2127k-4-2trg1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AP2127K-4.2TRG1.pdf) (24 pp, sha256 `d48c96ac985d348a`, retrieved 2026-10-23, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/ap2127k-4-2trg1-datasheet.pdf)