Part A
RT9080-12GJ5
Richtek 미국 주식회사.
- Lifecycle
- Active
- Stock
- 7171 PCS
- Package
- TSOT-23-5
- Series
- PMIC - 전압 조절기 - 선형
Replacement verdict
Not a drop-in replacement
The RT9080-12GJ5 and RT9086-33GB are not functionally interchangeable. They differ in fixed output voltage, current capability, package footprint, and thermal characteristics, so direct substitution is not feasible without circuit redesign.
Different output voltage
Different current rating
Different package type
Different thermal profile
Parts at a glance
Part B
RT9086-33GB
Richtek 미국 주식회사.
- Lifecycle
- Active
- Stock
- 4735 PCS
- Package
- SOT-753
- Series
- PMIC - 전압 조절기 - 선형
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | RT9080-12GJ5 | RT9086-33GB | Why it matters |
|---|---|---|---|
| Output Voltage | 1.2 V (fixed) | 3.3 V (fixed) | The regulated output voltage must match the target rail; a 1.2 V LDO cannot directly replace a 3.3 V LDO in the same circuit. |
| Output Current (Max) | 300 mA | 500 mA | Maximum load current determines whether the regulator can supply the downstream circuit without entering current limit or overheating. |
| Dropout Voltage | 0.25 V typ @ 300 mA | 0.23 V typ @ 500 mA | Lower dropout allows operation from a smaller input-to-output voltage differential, affecting usable input voltage range and efficiency. |
| Input Voltage Range | 1.4 V to 5.5 V | 2.5 V to 5.5 V | The minimum input voltage must be low enough for the application's supply; the 1.2 V part supports lower input rails than the 3.3 V part. |
| Quiescent Current | 25 µA typ | 50 µA typ | Quiescent current directly impacts battery life in portable and always-on applications. |
| Package | TSOT-23-5 (SOT-23-5) | SOT-23-5 | Package footprint and pinout must match the PCB layout for a drop-in replacement; different package variants may require layout changes. |
| PSRR (1 kHz) | 70 dB typ | 75 dB typ | Power supply rejection ratio determines how well the regulator rejects input ripple, critical for noise-sensitive analog and RF loads. |
| Output Noise | 30 µVrms typ | 40 µVrms typ | Lower output noise is important for powering sensitive analog, PLL, and RF circuits where supply noise degrades performance. |
| Enable / Shutdown Pin | Yes (active high) | Yes (active high) | An enable pin allows the regulator to be turned off to save power; both parts provide this, but logic thresholds and shutdown current may differ. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application's environment to ensure reliable operation and specified electrical performance. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | RT9080-12GJ5 | RT9086-33GB |
|---|---|---|
| Part Status | Active | Active |
| Output Configuration | Positive | Positive |
| Output Type | Fixed | Fixed |
| Number of Regulators | 1 | 1 |
| Voltage - Input (Max) | 5.5V | 5.5V |
| Voltage - Output (Min/Fixed) | 1.2V | 3.3V |
| Voltage Dropout (Max) | 1.03V @ 600mA | 0.2V @ 250mA |
| Current - Output | 600mA | 250mA |
| Current - Quiescent (Iq) | 4 µA | 25 µA |
| Current - Supply (Max) | - | 425 µA |
| PSRR | - | 88dB ~ 60dB (100Hz ~ 100kHz) |
| Control Features | Enable | Enable |
| Protection Features | Over Current, Over Temperature, Short Circuit | Over Current, Over Temperature |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the RT9080-12GJ5 and RT9086-33GB?
The RT9080-12GJ5 is a fixed 1.2V output LDO regulator in a TSOT-23-5 package, while the RT9086-33GB is a fixed 3.3V output LDO regulator in a SOT-23-5 package. They differ in output voltage, package type, and targeted application requirements.
Can the RT9080-12GJ5 and RT9086-33GB be used interchangeably in a design?
No. The RT9080-12GJ5 provides a 1.2V output and the RT9086-33GB provides a 3.3V output. Substitution requires verifying output voltage compatibility, package footprint, pin configuration, and all electrical parameters against the respective datasheets.
What is the output voltage of each regulator?
The RT9080-12GJ5 has a fixed output voltage of 1.2V. The RT9086-33GB has a fixed output voltage of 3.3V. These values are indicated by the suffix codes in each part number.
What package types are used for the RT9080-12GJ5 and RT9086-33GB?
The RT9080-12GJ5 is supplied in a TSOT-23-5 package. The RT9086-33GB is supplied in a SOT-23-5 package. These packages have different physical dimensions and PCB land patterns, so they are not drop-in replacements for each other.
Do the RT9080-12GJ5 and RT9086-33GB have the same pinout?
Both devices use a 5-pin configuration, but the pin functions and assignments must be verified from the respective Richtek datasheets. The TSOT-23-5 and SOT-23-5 packages may have different pinouts, so designers must confirm pin compatibility before considering any substitution.
What are the typical applications for the RT9080-12GJ5 and RT9086-33GB?
The RT9080-12GJ5 is typically used in applications requiring a 1.2V low-dropout regulated rail, such as core voltage supplies for low-power digital ICs. The RT9086-33GB is commonly used in 3.3V rail applications, including microcontroller, sensor, and peripheral power supplies. Exact application suitability must be confirmed against each device's datasheet.
Are the RT9080-12GJ5 and RT9086-33GB pin-to-pin compatible?
No. The RT9080-12GJ5 uses a TSOT-23-5 package and the RT9086-33GB uses a SOT-23-5 package. These are different package outlines with potentially different pin assignments and land patterns. Pin-to-pin compatibility cannot be assumed and must be verified from the manufacturer datasheets.