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AP7331-18SNG-7 Equivalent & Substitute Parts
Part Overview
The AP7331-18SNG-7 is a linear voltage regulator IC from Diodes Incorporated designed for positive fixed output applications. This device delivers 1.8V at 300mA output current in a compact 6-UDFN surface mount package with exposed pad. The regulator is actively produced and widely used in power management applications requiring low-dropout regulation with integrated protection features. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Category | Power Management (PMIC) |
| Output Voltage (Fixed) | 1.8V |
| Output Current | 300mA |
| Input Voltage (Max) | 6V |
| Package Type | 6-UDFN Exposed Pad (U-DFN2020-6) |
| Mounting Type | Surface Mount |
| Output Configuration | Positive Fixed |
| Control Features | Enable |
| Protection Features | Over Current, Over Temperature |
| Operating Temperature Range | -40°C to 85°C |
| Product Status | Active |
| RoHS Compliance | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the AP7331-18SNG-7 is determined by strict equivalence across the following critical parameters:
- Fixed output voltage of 1.8V
- Output current rating of 300mA
- Maximum input voltage of 6V
- 6-UDFN Exposed Pad package (U-DFN2020-6)
- Surface mount configuration
- Positive fixed output topology
- Enable control feature
- Over current and over temperature protection
- Operating temperature range of -40°C to 85°C
- Active product status
- ROHS3 compliance
The AP7335-18SNG-7 meets all substitution criteria as a parametric equivalent within the allowed electrical and mechanical specifications for this product category.
Parameter Comparison
| Parameter | AP7331-18SNG-7 | AP7335-18SNG-7 |
|---|---|---|
| Manufacturer | Diodes Incorporated | Diodes Incorporated |
| Output Voltage (Fixed) | 1.8V | 1.8V |
| Output Current | 300mA | 300mA |
| Input Voltage (Max) | 6V | 6V |
| Voltage Dropout (Max) | Not specified | 0.3V @ 300mA |
| Quiescent Current (Iq) | 75 µA | 80 µA |
| PSRR | 65dB (100Hz) | 65dB (1kHz) |
| Package Type | 6-UDFN Exposed Pad (U-DFN2020-6) | 6-UDFN Exposed Pad (U-DFN2020-6) |
| Mounting Type | Surface Mount | Surface Mount |
| Control Features | Enable | Enable |
| Protection Features | Over Current, Over Temperature | Over Current, Over Temperature |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C |
| Product Status | Active | Active |
| RoHS Compliance | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
Both the AP7331-18SNG-7 and AP7335-18SNG-7 are active products from Diodes Incorporated with identical ROHS3 compliance and REACH unaffected status. Selection between these parts is based on application-specific requirements and inventory availability. The AP7335-18SNG-7 provides specified dropout voltage performance of 0.3V at 300mA, which may be advantageous in applications with tight input voltage margins. Both devices maintain equivalent protection features, control functionality, and thermal operating range suitable for industrial and commercial power management applications.
Frequently Asked Questions (FAQ)
Q: Can the AP7335-18SNG-7 be used as a direct replacement for the AP7331-18SNG-7?
A: Yes. Both parts deliver identical output voltage (1.8V) and current (300mA) in the same 6-UDFN package with equivalent protection and control features. Electrical and mechanical compatibility is maintained across all specified parameters.
Q: What are the key differences between these two parts?
A: The AP7335-18SNG-7 specifies dropout voltage performance (0.3V @ 300mA) and quiescent current (80 µA), while the AP7331-18SNG-7 does not provide dropout voltage specification and specifies 75 µA quiescent current. PSRR measurement frequency differs (100Hz vs 1kHz).
Q: Are both parts suitable for the same PCB layout?
A: Yes. Both parts use the identical 6-UDFN Exposed Pad (U-DFN2020-6) package and surface mount configuration, requiring no PCB redesign for substitution.
Q: Do these parts have the same compliance certifications?
A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating.
Q: What is the operating temperature range for both parts?
A: Both the AP7331-18SNG-7 and AP7335-18SNG-7 operate across -40°C to 85°C.
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