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RT9078-25GJ5
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Richtek Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TSOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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RT9078-25GJ5
Richtek Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TSOT-23-5
RT9078-25GJ5 from Richtek Tech, in a TSOT-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 | Regulator input pin that operates from 1.2V to 5.5V; the input capacitor should be placed directly at this pin. |
| 2 | GND | power_in | Ground pin for the regulator. |
| 3 | EN | input | Chip enable pin; pulling it below 0.4V turns the regulator off and reduces quiescent current to a fraction of its operating value, while VEN above 0.9V turns the regulator on. |
| 4 | NC | unconnected | No internal connection on the RT9078 (no SNS function; the SNS output voltage sense pin exists only on the RT9078N variant). |
| 5 | VOUT | power_out | Regulator output pin; the output capacitor should be placed directly at this pin, with a minimum of 1μF capacitance required for stable operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | TSOT-23-5 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage (recommended operating) | VIN | 1.2 | 5.5 | V | 5 | ||
| Junction Temperature Range (recommended operating) | TJ | -40 | 125 | °C | 5 | ||
| VIN, VOUT, SNS, EN to GND | -0.3 | 6.5 | V | 5 | |||
| VOUT to VIN | -6.5 | 0.3 | V | 5 | |||
| Power Dissipation PD (TSOT-23-5) | PD | 0.43 | W | TA = 25°C | 5 | ||
| Package Thermal Resistance TSOT-23-5 junction-to-ambient | θJA | 230.6 | °C/W | TSOT-23-5, JEDEC 51-7 four-layer board | 5 | ||
| Package Thermal Resistance TSOT-23-5 junction-to-case | θJC | 21.8 | °C/W | TSOT-23-5 | 5 | ||
| Lead Temperature (soldering) | 260 | °C | 10 sec soldering | 5 | |||
| Junction Temperature | TJ | 150 | °C | 5 | |||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 5 | ||
| ESD Susceptibility HBM | 2 | kV | HBM (Human Body Model) | 5 | |||
| Fixed Output Voltage Range | VOUT | 0.8 | 3.45 | V | 5 | ||
| DC Output Accuracy | -2 | 2 | % | ILOAD = 1mA | 5 | ||
| Dropout Voltage (ILOAD = 300mA), 2.5V ≤ VOUT ≤ 2.8V | VDROP | 0.18 | 0.25 | V | ILOAD = 300mA (Note 5); 2.5V ≤ VOUT ≤ 2.8V | 5 | |
| VCC Consumption Current | IQ | 2 | 4 | µA | ILOAD = 0mA, VOUT ≤ 5.5V, VIN ≥ VOUT + VDROP | 5 | |
| Shutdown GND Current | 0.1 | 0.5 | µA | VEN = 0V (Note 7) | 6 | ||
| Shutdown Leakage Current | 0.1 | 0.5 | µA | VEN = 0V, VOUT = 0V (Note 7) | 6 | ||
| EN Input Current | IEN | 0.1 | µA | VEN = 5.5V | 6 | ||
| Line Regulation | LINE | 0.13 | 0.35 | % | ILOAD = 1mA; 1.8V ≤ VIN ≤ 5.5V | 6 | |
| Load Regulation | LOAD | 0.5 | 1 | % | 1mA < ILOAD < 300mA | 6 | |
| Output Current Limit | ILIM | 350 | 600 | mA | VOUT = 90% of VOUT(NOM) | 6 | |
| Enable Threshold Voltage H-Level | VENH | 0.5 | 0.7 | 0.9 | V | VIN = 5V | 6 |
| Enable Threshold Voltage L-Level | VENL | 0.4 | 0.65 | 0.85 | V | VIN = 5V | 6 |
| Thermal Shutdown Temperature | TSD | 150 | °C | ILOAD = 30mA, VIN ≥ 1.5V | 6 | ||
| Thermal Shutdown Hysteresis | TSD | 20 | °C | 6 | |||
| Discharge Resistance | 80 | EN = 0V, VOUT = 0.1V | 6 |
CAD (KiCad official)
- Symbol:
RT9078-25GJ5 - Footprint:
Package_TO_SOT_SMD:TSOT-23-5 - 3D model: TSOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
rt9078-25gj5-etched.step/rt9078-25gj5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rt9078-25gj5.step/rt9078-25gj5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Richtek Tech datasheet (16 pp, sha256
58b21b14eba5e089, retrieved 2026-10-19, 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).
# RT9078-25GJ5
**Richtek Tech** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TSOT-23-5
RT9078-25GJ5 from Richtek Tech, in a TSOT-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 | Regulator input pin that operates from 1.2V to 5.5V; the input capacitor should be placed directly at this pin. |
| 2 | GND | power_in | Ground pin for the regulator. |
| 3 | EN | input | Chip enable pin; pulling it below 0.4V turns the regulator off and reduces quiescent current to a fraction of its operating value, while VEN above 0.9V turns the regulator on. |
| 4 | NC | unconnected | No internal connection on the RT9078 (no SNS function; the SNS output voltage sense pin exists only on the RT9078N variant). |
| 5 | VOUT | power_out | Regulator output pin; the output capacitor should be placed directly at this pin, with a minimum of 1μF capacitance required for stable operation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | TSOT-23-5 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage (recommended operating) | VIN | 1.2 | | 5.5 | V | | 5 |
| Junction Temperature Range (recommended operating) | TJ | -40 | | 125 | °C | | 5 |
| VIN, VOUT, SNS, EN to GND | | -0.3 | | 6.5 | V | | 5 |
| VOUT to VIN | | -6.5 | | 0.3 | V | | 5 |
| Power Dissipation PD (TSOT-23-5) | PD | | | 0.43 | W | TA = 25°C | 5 |
| Package Thermal Resistance TSOT-23-5 junction-to-ambient | θJA | | 230.6 | | °C/W | TSOT-23-5, JEDEC 51-7 four-layer board | 5 |
| Package Thermal Resistance TSOT-23-5 junction-to-case | θJC | | 21.8 | | °C/W | TSOT-23-5 | 5 |
| Lead Temperature (soldering) | | | | 260 | °C | 10 sec soldering | 5 |
| Junction Temperature | TJ | | | 150 | °C | | 5 |
| Storage Temperature Range | TSTG | -65 | | 150 | °C | | 5 |
| ESD Susceptibility HBM | | | | 2 | kV | HBM (Human Body Model) | 5 |
| Fixed Output Voltage Range | VOUT | 0.8 | | 3.45 | V | | 5 |
| DC Output Accuracy | | -2 | | 2 | % | ILOAD = 1mA | 5 |
| Dropout Voltage (ILOAD = 300mA), 2.5V ≤ VOUT ≤ 2.8V | VDROP | | 0.18 | 0.25 | V | ILOAD = 300mA (Note 5); 2.5V ≤ VOUT ≤ 2.8V | 5 |
| VCC Consumption Current | IQ | | 2 | 4 | µA | ILOAD = 0mA, VOUT ≤ 5.5V, VIN ≥ VOUT + VDROP | 5 |
| Shutdown GND Current | | | 0.1 | 0.5 | µA | VEN = 0V (Note 7) | 6 |
| Shutdown Leakage Current | | | 0.1 | 0.5 | µA | VEN = 0V, VOUT = 0V (Note 7) | 6 |
| EN Input Current | IEN | | | 0.1 | µA | VEN = 5.5V | 6 |
| Line Regulation | LINE | | 0.13 | 0.35 | % | ILOAD = 1mA; 1.8V ≤ VIN ≤ 5.5V | 6 |
| Load Regulation | LOAD | | 0.5 | 1 | % | 1mA < ILOAD < 300mA | 6 |
| Output Current Limit | ILIM | 350 | 600 | | mA | VOUT = 90% of VOUT(NOM) | 6 |
| Enable Threshold Voltage H-Level | VENH | 0.5 | 0.7 | 0.9 | V | VIN = 5V | 6 |
| Enable Threshold Voltage L-Level | VENL | 0.4 | 0.65 | 0.85 | V | VIN = 5V | 6 |
| Thermal Shutdown Temperature | TSD | | 150 | | °C | ILOAD = 30mA, VIN ≥ 1.5V | 6 |
| Thermal Shutdown Hysteresis | TSD | | 20 | | °C | | 6 |
| Discharge Resistance | | | 80 | | | EN = 0V, VOUT = 0.1V | 6 |
## CAD (KiCad official)
- Symbol: `RT9078-25GJ5`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-5`
- 3D model: TSOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `rt9078-25gj5-etched.step` / `rt9078-25gj5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rt9078-25gj5.step` / `rt9078-25gj5.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Richtek Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918008668696576) (16 pp, sha256 `58b21b14eba5e089`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/rt9078-25gj5-datasheet.pdf)