Part A
ADP3334ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4363 PCS
- Package
- SOIC-8
- Series
- PMIC - régulateur de tension - linéaire
Replacement verdict
Compatible functional replacement candidate
The ADP3334ARZ and ADP3301AR-3.3 are both low-dropout linear regulators from Analog Devices in the same SOIC-8 package, sharing a 3.3 V-class output and comparable current capability, so the ADP3334ARZ can serve as a functional replacement candidate for the ADP3301AR-3.3 in many designs. However, the ADP3334ARZ is an adjustable-output device requiring an external resistor divider to set 3.3 V, and its pin function and compensation differ from the fixed-output ADP3301AR-3.3, so the replacement must be validated at the board level before adoption.
Output Type
Validation required
Output Current Rating
High match
Package Type
High match
Pin Configuration
Validation required
Parts at a glance
Part B
ADP3301AR-3.3
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5610 PCS
- Package
- SOIC-8
- Series
- PMIC - régulateur de tension - linéaire
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADP3334ARZ | ADP3301AR-3.3 | Why it matters |
|---|---|---|---|
| Output Voltage | Adjustable (1.5 V to 10 V) | Fixed 3.3 V | Determines whether the part can directly supply the required rail voltage or needs external feedback resistors. |
| Output Current (Max) | 500 mA | 100 mA | Defines the maximum load the regulator can support; a lower-current part may not be substitutable in higher-load designs. |
| Input Voltage Range (Max) | 12 V | 12 V | Sets the maximum allowable input supply; both share the same upper limit, easing input-side compatibility. |
| Dropout Voltage (Typical) | 200 mV @ 500 mA | 180 mV @ 100 mA | Lower dropout allows operation closer to the input rail; the specified conditions differ, affecting headroom requirements. |
| Quiescent Current (Typical) | 0.8 mA | 0.7 mA | Affects standby power consumption, important for battery-powered or always-on applications. |
| Output Voltage Accuracy | ±1.5% (adjustable) | ±0.8% (fixed) | Tighter accuracy ensures the load receives a voltage within tighter tolerance, which can matter for sensitive circuits. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package footprint allows drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ranges confirm both parts suit the same environmental conditions. |
| Enable / Shutdown Control | Yes (active high) | Yes (active high) | Both support logic-controlled shutdown, preserving power-management behavior in the application. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADP3334ARZ | ADP3301AR-3.3 |
|---|---|---|
| Series | anyCAP® | anyCAP® |
| Part Status | Active | Obsolete |
| Output Configuration | Positive | Positive |
| Output Type | Adjustable | Fixed |
| Number of Regulators | 1 | 1 |
| Voltage - Input (Max) | 11V | 12V |
| Voltage - Output (Min/Fixed) | 1.5V | 3.3V |
| Voltage Dropout (Max) | 0.4V @ 500mA | 0.2V @ 100mA |
| Current - Output | 500mA | 100mA |
| Current - Quiescent (Iq) | 130 µA | 300 µA |
| Current - Supply (Max) | 10 mA | 2 mA |
| Control Features | Feedback, Shutdown | Error Flag, Shutdown |
| Protection Features | Over Current, Over Temperature | Over Temperature |
| Operating Temperature | -40°C ~ 85°C (TA) | -20°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Voltage - Output (Max) | 10V | - |
Frequently asked questions
What are the key differences between the ADP3334ARZ and ADP3301AR-3.3?
The ADP3334ARZ is an adjustable low-dropout (LDO) linear regulator in an 8-lead SOIC package with a 500 mA output current capability, while the ADP3301AR-3.3 is a fixed 3.3 V LDO regulator in an 8-lead SOIC package rated for 100 mA output current. The ADP3334ARZ uses an external resistor divider to set the output voltage, whereas the ADP3301AR-3.3 provides a factory-trimmed fixed 3.3 V output.
Are the ADP3334ARZ and ADP3301AR-3.3 pin-compatible?
Both devices are offered in an 8-lead SOIC (R-8) package, but their pin functions differ. The ADP3334ARZ includes an adjustable feedback (SET) pin and a shutdown pin, while the ADP3301AR-3.3 provides a fixed output with an ERR (error flag) pin. Pin assignments must be verified against the respective manufacturer datasheets before any layout substitution.
What is the maximum output current of each regulator?
The ADP3334ARZ is rated for up to 500 mA of output current, while the ADP3301AR-3.3 is rated for up to 100 mA. The higher current capability of the ADP3334ARZ makes it suitable for heavier load applications, whereas the ADP3301AR-3.3 targets lower-power circuits.
What output voltage does each device provide?
The ADP3334ARZ is an adjustable regulator whose output voltage is set by an external resistor divider, allowing a user-defined output within its specified range. The ADP3301AR-3.3 provides a fixed 3.3 V output, factory-trimmed by the manufacturer, requiring no external feedback resistors.
Do both parts include a shutdown or enable function?
The ADP3334ARZ includes a shutdown (SD) pin that allows the regulator to be disabled, reducing quiescent current. The ADP3301AR-3.3 does not provide a dedicated shutdown pin; instead it offers an ERR flag output. Designers requiring enable/disable control should account for this difference.
Can the ADP3301AR-3.3 be used as a drop-in replacement for the ADP3334ARZ?
No. Beyond the pin function differences, the ADP3301AR-3.3 is a fixed 3.3 V, 100 mA device, while the ADP3334ARZ is adjustable and rated for 500 mA. A direct substitution would change both the output voltage configuration and the available load current, so the circuit must be revalidated against the target design requirements.
What package type do both regulators use?
Both the ADP3334ARZ and ADP3301AR-3.3 are supplied in an 8-lead SOIC package (R-8 suffix). The shared package family allows similar PCB footprint dimensions, but the differing pin functions mean the surrounding circuitry and land pattern connections must be checked individually.