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AP7331-30WG-7 Equivalent & Substitute Parts
Part Overview
The AP7331-30WG-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed for positive fixed 3V output applications with 300mA current capacity. This Surface Mount device in SOT-25 packaging is classified as Active product status and is ROHS3 compliant. Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements necessitate alternative electrical characteristics such as improved dropout voltage or quiescent current performance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AP7331-30WG-7 |
| Manufacturer | Diodes Incorporated |
| Category | Power Management (PMIC) |
| Output Voltage (Fixed) | 3V |
| Output Current | 300mA |
| Input Voltage (Max) | 6V |
| Dropout Voltage (Max) | 0.55V @ 300mA |
| Quiescent Current | 75 µA |
| Package / Case | SC-74A, SOT-753 |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C ~ 85°C |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the AP7331-30WG-7 are classified based on the following critical parameters that determine functional equivalence:
Primary Substitution Criteria:
- Output voltage: 3V fixed
- Output current capability: 200mA minimum to 300mA
- Input voltage maximum: 5.5V to 6V
- Package compatibility: SOT-25 / SC-74A / SMV form factors
- Mounting type: Surface Mount
- Control features: Enable function
- Protection: Over Current and Over Temperature protection
- Product status: Active
- Compliance: ROHS3 compliant
Substitute Categories:
Parametric Equivalents (Direct Replacement Candidates): Parts with identical or superior electrical specifications and compatible packaging. These include AP7335-30WG-7, TCR3DF30,LM, TCR3DF30,LM(CT, and TCR3UF30A,LM(CT from Toshiba Semiconductor.
Manufacturer Recommended Alternatives: Parts recommended by manufacturers as functional substitutes with acceptable trade-offs in specific parameters. These include BU30SD2MG-MTR and BU30TD3WG-TR from Rohm Semiconductor, which offer reduced output current (200mA) but improved dropout voltage characteristics.
Parameter Comparison
| Parameter | AP7331-30WG-7 | AP7335-30WG-7 | BU30SD2MG-MTR | BU30TD3WG-TR | TCR3DF30,LM(CT | TCR3UF30A,LM(CT |
|---|---|---|---|---|---|---|
| Manufacturer | Diodes Inc. | Diodes Inc. | Rohm Semi. | Rohm Semi. | Toshiba Semi. | Toshiba Semi. |
| Output Voltage | 3V | 3V | 3V | 3V | 3V | 3V |
| Output Current | 300mA | 300mA | 200mA | 200mA | 300mA | 300mA |
| Input Voltage (Max) | 6V | 6V | 6V | 6V | 5.5V | 5.5V |
| Dropout Voltage (Max) | 0.55V @ 300mA | 0.2V @ 300mA | 0.15V @ 100mA | 0.46V @ 200mA | 0.27V @ 300mA | 0.287V @ 300mA |
| Quiescent Current | 75 µA | 80 µA | 80 µA | 60 µA | 65 µA | 680 nA |
| PSRR | 65dB (100Hz) | 65dB (1kHz) | 68dB (1kHz) | 70dB (1kHz) | 70dB (1kHz) | 70dB (1kHz) |
| Package / Case | SC-74A, SOT-753 | SC-74A, SOT-753 | SC-74A, SOT-753 | SC-74A, SOT-753 | SC-74A, SOT-753 | SC-74A, SOT-753 |
| Supplier Device Package | SOT-25 | SOT-25 | 5-SSOP | 5-SSOP | SMV | SMV |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 105°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Product Status | Active | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
AP7335-30WG-7 (Diodes Incorporated): Direct parametric equivalent with superior dropout voltage performance (0.2V vs 0.55V @ 300mA). Maintains identical output current, voltage specifications, and operating temperature range. Active product status with ROHS3 compliance. Recommended as primary substitute when supply availability is constrained.
TCR3DF30,LM(CT (Toshiba Semiconductor): Parametric equivalent offering 300mA output current with improved dropout voltage (0.27V @ 300mA) and PSRR performance (70dB @ 1kHz). Input voltage maximum of 5.5V requires verification for applications requiring full 6V input range. Active product status with ROHS3 compliance.
TCR3UF30A,LM(CT (Toshiba Semiconductor): Parametric equivalent with exceptional quiescent current performance (680 nA vs 75 µA). Maintains 300mA output current and 3V fixed output. Input voltage maximum of 5.5V requires verification for applications requiring full 6V input range. Active product status with ROHS3 compliance.
BU30SD2MG-MTR (Rohm Semiconductor): Manufacturer recommended alternative with reduced output current (200mA vs 300mA). Offers superior dropout voltage (0.15V @ 100mA) and extended operating temperature range (-40°C ~ 105°C). Automotive series qualification (AEC-Q100). Active product status with ROHS3 compliance. Suitable for applications with lower current requirements.
BU30TD3WG-TR (Rohm Semiconductor): Manufacturer recommended alternative with reduced output current (200mA vs 300mA). Offers improved PSRR (70dB @ 1kHz) and lower quiescent current (60 µA). Active product status with ROHS3 compliance. Suitable for applications with lower current requirements.
Frequently Asked Questions (FAQ)
Q: Can AP7335-30WG-7 directly replace AP7331-30WG-7 without circuit modifications?
A: Yes. AP7335-30WG-7 maintains identical output voltage (3V), output current (300mA), input voltage maximum (6V), operating temperature range (-40°C ~ 85°C), and package specifications (SOT-25). The improved dropout voltage (0.2V vs 0.55V @ 300mA) represents a performance enhancement with no negative impact on circuit operation.
Q: What are the limitations when using BU30SD2MG-MTR or BU30TD3WG-TR as substitutes?
A: Both Rohm alternatives provide reduced output current capacity (200mA vs 300mA). Circuit designs requiring full 300mA output current cannot use these parts. Applications with maximum current draw below 200mA are compatible. Both maintain 3V output voltage and SOT-25 package compatibility.
Q: Are Toshiba TCR3DF30,LM(CT and TCR3UF30A,LM(CT suitable for applications requiring 6V input voltage?
A: Both Toshiba parts specify maximum input voltage of 5.5V, compared to 6V for the AP7331-30WG-7. Applications with input voltage exceeding 5.5V require verification of actual operating conditions. If input voltage remains below 5.5V in practice, these parts are suitable substitutes.
Q: What is the difference between TCR3DF30,LM and TCR3DF30,LM(CT packaging?
A: TCR3DF30,LM is supplied in Cut Tape (CT) packaging with 30,100 units in stock. TCR3DF30,LM(CT is supplied in Tape & Reel (TR) packaging with 6,036 units in stock. Electrical specifications are identical. Selection depends on assembly process requirements and volume needs.
Q: Which substitute offers the best quiescent current performance?
A: TCR3UF30A,LM(CT provides exceptional quiescent current of 680 nA, compared to 75 µA for the AP7331-30WG-7. This represents a 110x reduction in quiescent current, beneficial for battery-powered or ultra-low-power applications. Input voltage maximum of 5.5V must be verified for compatibility.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance matching the original AP7331-30WG-7 specification.
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