Part A
ADP3334ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4363 PCS
- Package
- SOIC-8
- Series
- PMIC - Reguladores de Voltação - Linear
Replacement verdict
Compatible functional replacement candidate
The ADP3334ARZ and ADP3301AR-2.7 are both low-dropout linear regulators from Analog Devices in the same SOIC-8 package, but they differ in output voltage configuration and current capability. The ADP3334ARZ is an adjustable-output LDO rated for up to 500 mA, while the ADP3301AR-2.7 is a fixed 2.7 V output LDO rated for 100 mA. Because the output voltage architecture and current rating differ, the ADP3301AR-2.7 is not a direct drop-in substitute for the ADP3334ARZ in most designs; substitution requires validation of the target output voltage, load current, and external resistor network.
Output Voltage Configuration
Validation required
Output Current Rating
Not compatible
Package Type
High match
External Component Requirements
Validation required
Parts at a glance
Part B
ADP3301AR-2.7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4690 PCS
- Package
- SOIC-8
- Series
- PMIC - Reguladores de Voltação - Linear
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-2.7 | Why it matters |
|---|---|---|---|
| Output Voltage | Adjustable (1.5 V to 10 V) | 2.7 V (fixed) | Determines whether the part can be set to the required rail voltage; a fixed 2.7 V output cannot substitute for an adjustable design needing another voltage. |
| Output Current Capability | 500 mA | 100 mA | The load current must not exceed the regulator's rated output; the ADP3301 delivers far less current than the ADP3334. |
| Input Voltage Range | 2.9 V to 12 V | 3.0 V to 12 V | Defines the allowable supply window and headroom; slight differences affect low-supply operation and dropout margin. |
| Dropout Voltage | 200 mV at 500 mA | 180 mV at 100 mA | Lower dropout allows operation closer to the input rail; the specified dropout is tied to different load currents, affecting usable headroom. |
| Quiescent Current | 110 µA typical | 70 µA typical | Affects standby power consumption, important in battery-powered and always-on applications. |
| Output Voltage Accuracy | ±1.4% (adjustable) | ±0.8% (fixed) | Tighter accuracy improves regulation margin for sensitive loads; the fixed part offers better initial accuracy. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Footprint and thermal characteristics must match the board layout for a drop-in replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms both parts support the same ambient conditions for the target application. |
| Enable / Shutdown Control | Yes (active-low shutdown) | Yes (active-low shutdown) | Both provide power-down control, allowing the regulator to be disabled to save power. |
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-2.7 |
|---|---|---|
| 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 | 2.7V |
| 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-2.7?
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-2.7 is a fixed 2.7 V output LDO in an 8-lead SOIC package rated for 100 mA. The ADP3334ARZ uses an external resistor divider to set the output voltage, whereas the ADP3301AR-2.7 provides a factory-fixed 2.7 V output.
Can the ADP3334ARZ and ADP3301AR-2.7 be used interchangeably in the same design?
No, they are not drop-in replacements. The ADP3334ARZ is adjustable and requires external feedback resistors, while the ADP3301AR-2.7 is a fixed 2.7 V regulator. Output current ratings (500 mA vs 100 mA), pin functions, and external component requirements differ, so the circuit must be redesigned and validated against the respective datasheets.
What output current can each regulator deliver?
The ADP3334ARZ is specified for up to 500 mA of output current. The ADP3301AR-2.7 is specified for up to 100 mA of output current. Designs must not exceed these ratings per the manufacturer datasheets.
How is the output voltage set on each device?
The ADP3334ARZ is an adjustable regulator whose output voltage is programmed by an external resistor divider connected to its feedback pin. The ADP3301AR-2.7 has a fixed 2.7 V output and does not require external feedback resistors for voltage setting.
Do both parts come in the same package?
Both the ADP3334ARZ and ADP3301AR-2.7 are offered in an 8-lead SOIC package. However, pin functions and external component requirements differ, so PCB layouts are not directly interchangeable without verification against the respective datasheets.
What are the input voltage and dropout considerations for these regulators?
Both are low-dropout linear regulators intended for operation from a higher input supply than the regulated output. The ADP3334ARZ supports an adjustable output with low dropout at its rated 500 mA, while the ADP3301AR-2.7 provides a fixed 2.7 V output at up to 100 mA. Exact input voltage ranges and dropout voltages must be confirmed from the official manufacturer datasheets before use.
Which part should be selected for a 2.7 V rail at 100 mA?
The ADP3301AR-2.7 is the appropriate choice because it provides a factory-fixed 2.7 V output at up to 100 mA without external feedback components. The ADP3334ARZ could also be configured for 2.7 V using an external resistor divider, but it would require additional components and offers a higher current capability than needed.