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-3 are both low-dropout linear regulators from Analog Devices in the same SOIC-8 package, sharing a 3.3 V-class output architecture and comparable input voltage range, making the ADP3334ARZ a viable functional replacement candidate for the ADP3301AR-3 in many designs. However, the ADP3334ARZ offers an adjustable output and higher current capability, while the ADP3301AR-3 provides a fixed 3.3 V output, so output configuration and current margin must be validated against the target application before substitution.
Output Voltage Configuration
Validation required
Output Current Rating
Validation required
Package Type
High match
Input Voltage Range
High match
Parts at a glance
Part B
ADP3301AR-3
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2028 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-3 | Why it matters |
|---|---|---|---|
| Output Voltage | Adjustable (1.5 V to 10 V) | 3.0 V fixed | Determines whether the part can be used directly for a fixed rail or requires external feedback resistors for a custom output. |
| Output Current (Max) | 500 mA | 100 mA | Defines the maximum load the regulator can supply; a lower-current part cannot substitute in higher-load designs. |
| Input Voltage Range (Max) | 12 V | 12 V | Sets the maximum allowable input supply; both share the same upper limit, so input headroom compatibility is equivalent. |
| Dropout Voltage | 200 mV @ 500 mA | 180 mV @ 100 mA | Affects the minimum input-to-output headroom needed; lower dropout allows operation closer to the input rail. |
| Quiescent Current | 130 µA typical | 70 µA typical | Impacts standby power consumption, which is critical in battery-powered or always-on applications. |
| Output Noise | Not specified in datasheet | Not specified in datasheet | Noise performance affects sensitive analog or RF loads; neither part publishes a comparable noise figure, so this cannot differentiate them. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Footprint and thermal characteristics must match for a drop-in board replacement; both use the same SOIC-8 package. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms both parts are rated for the same industrial temperature envelope, so environmental compatibility is equivalent. |
| Enable / Shutdown Pin | Yes (active high) | Yes (active high) | Allows the regulator to be powered down by a logic signal; both provide this control, preserving system power-management behavior. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADP3334ARZ | ADP3301AR-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 | 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?
The ADP3334ARZ is an adjustable output LDO in an 8-lead SOIC package, while the ADP3301AR-3 is a fixed 3.0 V output LDO in an 8-lead SOIC package. The ADP3334ARZ offers a wider adjustable output range and higher output current capability, whereas the ADP3301AR-3 provides a factory-set 3.0 V output with the anyCAP stability feature.
What is the maximum output current of each device?
The ADP3334ARZ is rated for up to 500 mA of output current, while the ADP3301AR-3 is rated for up to 100 mA. Designs requiring higher load current should account for this difference.
Are the output voltage configurations of these two parts interchangeable?
No. The ADP3334ARZ is an adjustable regulator whose output is set by an external resistor divider, whereas the ADP3301AR-3 has a fixed 3.0 V output. They are not directly interchangeable without redesigning the feedback network and verifying the target voltage.
Do both parts use the same package and pinout?
Both devices are offered in an 8-lead SOIC package, but their pin functions differ because one is adjustable and the other is fixed-output. PCB layout and pin connections must be verified against each device's respective datasheet before substitution.
What is the input voltage range for each regulator?
The ADP3334ARZ operates with an input voltage range suitable for its adjustable output configuration, and the ADP3301AR-3 operates from a low input voltage to regulate a fixed 3.0 V output. Exact minimum and maximum input voltages should be confirmed from the respective manufacturer datasheets for the target operating conditions.
Which part is better suited for low-noise, space-constrained designs?
Both are low-dropout linear regulators with anyCAP stability, allowing use with a wide range of output capacitors. The ADP3301AR-3 is a fixed 3.0 V, 100 mA device suited to low-power rails, while the ADP3334ARZ provides higher current and adjustable output for applications needing flexibility. Selection depends on required current, output voltage, and board space.
Can the ADP3301AR-3 be replaced by the ADP3334ARZ without circuit changes?
No. Because the ADP3334ARZ is adjustable and rated for higher current, replacing the fixed 3.0 V ADP3301AR-3 requires adding an external resistor divider to set the output voltage and verifying thermal and stability performance against the ADP3334ARZ datasheet.