Part A
ADP3334ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4363 PCS
- Package
- SOIC-8
- Series
- PMIC - Voltage Regulators - Linear
Replacement verdict
Compatible functional replacement candidate
The ADP3334ARZ and ADP3301AR-5 are both low-dropout linear regulators from Analog Devices in the same 8-lead SOIC package, sharing a 5 V nominal output and comparable input voltage range, making the ADP3334ARZ a viable functional substitute for the ADP3301AR-5 in many designs. However, the ADP3334ARZ offers a wider adjustable output range and higher current capability, while the ADP3301AR-5 is a fixed 5 V regulator with lower quiescent current, so the designer must validate load current, output configuration, and thermal margins before substituting.
Output Voltage Configuration
High match
Package Type
High match
Output Current Rating
Validation required
Quiescent Current
Validation required
Parts at a glance
Part B
ADP3301AR-5
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9121 PCS
- Package
- SOIC-8
- Series
- PMIC - Voltage Regulators - 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-5 | Why it matters |
|---|---|---|---|
| Output Voltage | Adjustable (1.5 V to 10 V, set by external resistors) | Fixed 5.0 V | Determines whether the part can directly supply the required rail voltage or needs external feedback components; a fixed 5 V part cannot be set to other voltages. |
| Output Current (Max) | 500 mA | 100 mA | Sets the maximum load the regulator can support; substituting a lower-current part may cause dropout or thermal issues in higher-load designs. |
| Input Voltage Range (Max) | 12 V | 12 V | Defines the maximum safe input supply; both share the same ceiling, so input headroom compatibility is equivalent. |
| Dropout Voltage (Typical) | 200 mV @ 500 mA | 180 mV @ 100 mA | Lower dropout allows operation closer to the input rail; the values are specified at different load currents, so efficiency at a given load differs. |
| Quiescent Current (Typical) | 0.8 mA | 0.7 mA | Affects standby power consumption; small differences matter in battery-powered or always-on applications. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Identical footprint and mounting allow drop-in board replacement without layout changes. |
| 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. |
| Output Voltage Accuracy | ±1.5% (adjustable, over temperature) | ±0.8% (fixed, at 25 °C) | Tighter accuracy reduces rail tolerance stack-up; the fixed part offers better initial accuracy while the adjustable part depends on external resistor tolerance. |
| Enable / Shutdown Control | Yes (active-high EN pin) | Yes (active-high EN pin) | Both support logic-controlled shutdown for power sequencing and low-power modes, so control-interface compatibility is equivalent. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADP3334ARZ | ADP3301AR-5 |
|---|---|---|
| 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 | 5V |
| 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-5?
The ADP3334ARZ is an adjustable output LDO regulator in an 8-lead SOIC package, while the ADP3301AR-5 is a fixed 5.0 V output LDO regulator in an 8-lead SOIC package. The ADP3334ARZ offers a wider adjustable output voltage range and higher output current capability, whereas the ADP3301AR-5 provides a factory-trimmed 5.0 V output with lower quiescent current.
What is the maximum output current of each device?
The ADP3334ARZ is rated for a maximum output current of 500 mA. The ADP3301AR-5 is rated for a maximum output current of 100 mA. These ratings are specified in the respective manufacturer datasheets.
Are the ADP3334ARZ and ADP3301AR-5 pin-compatible?
Both devices are offered in an 8-lead SOIC package, but their pin functions differ. The ADP3334ARZ uses pins for adjustable feedback (SET), while the ADP3301AR-5 has a fixed output configuration with different pin assignments. Therefore, they are not directly pin-compatible and require separate PCB layouts.
What is the output voltage configuration of each regulator?
The ADP3334ARZ is an adjustable output regulator, with the output voltage set by an external resistor divider connected to the SET pin. The ADP3301AR-5 is a fixed 5.0 V output regulator, requiring no external feedback resistors for voltage setting.
How do the quiescent currents compare?
The ADP3301AR-5 features a low quiescent current of typically 0.8 mA at no load, making it suitable for battery-powered applications. The ADP3334ARZ has a higher quiescent current, typically around 1.5 mA. Designers should consult the respective datasheets for exact conditions and maximum values.
What input voltage ranges do these regulators support?
The ADP3334ARZ operates with an input voltage range of 2.7 V to 12 V. The ADP3301AR-5 operates with an input voltage range of 3.0 V to 12 V. Both ranges are specified in the manufacturer datasheets and must be respected for proper regulation and device protection.
Can the ADP3301AR-5 be used as a drop-in replacement for the ADP3334ARZ?
No. The ADP3301AR-5 is a fixed 5.0 V regulator with a 100 mA current rating, while the ADP3334ARZ is adjustable with a 500 mA rating. Differences in output configuration, current capability, pin functions, and external component requirements prevent a direct drop-in replacement without design validation.
What are the typical applications for each device?
The ADP3334ARZ is suited for applications requiring an adjustable output and up to 500 mA, such as post-regulation and general-purpose power supplies. The ADP3301AR-5 is suited for low-power, fixed 5.0 V rails in battery-operated and portable equipment where low quiescent current is important.