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SC4626CSKTRT Equivalent & Substitute Parts
Part Overview
The SC4626CSKTRT is a buck switching regulator IC manufactured by Semtech Corporation, designed for positive fixed 1.2V output at 1A in a SOT-23-5 package. This device is classified as not for new designs, indicating it has reached end-of-life status. Finding equivalent substitute parts is necessary for applications requiring continued supply or design flexibility when the original part becomes unavailable.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Semtech Corporation |
| Part Number | SC4626CSKTRT |
| Category | Power Management (PMIC) |
| Function | Step-Down (Buck) |
| Output Type | Fixed 1.2V |
| Output Current | 1A |
| Input Voltage Range | 2.9V to 5.5V |
| Switching Frequency | 2.5MHz |
| Package | SOT-23-5 (SC-74A) |
| Operating Temperature | -40°C to 125°C (TJ) |
| Synchronous Rectifier | Yes |
| Product Status | Not For New Designs |
| RoHS Status | RoHS Compliant |
Substitute Part Grouping Explanation
Substitution of the SC4626CSKTRT is determined by the following critical parameters:
- Package Compatibility: SOT-23-5 pinout and physical dimensions
- Output Current Rating: Minimum 1A capability
- Input Voltage Range: Support for 2.9V to 5.5V operation
- Topology: Buck (step-down) switching regulator
- Output Configuration: Positive output
- Synchronous Rectification: Presence of integrated synchronous rectifier
- Switching Frequency: Operating in the 1.5MHz to 2.5MHz range
The PAM2312AABADJ from Diodes Incorporated meets these substitution criteria through compatible package, current rating, input voltage support, and topology. While the PAM2312AABADJ features adjustable output voltage rather than fixed 1.2V, it can be configured to deliver 1.2V output through external resistor networks, making it functionally equivalent for this application.
Parameter Comparison
| Parameter | SC4626CSKTRT (Main) | PAM2312AABADJ (Substitute) |
|---|---|---|
| Manufacturer | Semtech Corporation | Diodes Incorporated |
| Category | Power Management (PMIC) | Power Management (PMIC) |
| Function | Step-Down | Step-Down |
| Output Configuration | Positive | Positive |
| Topology | Buck | Buck |
| Number of Outputs | 1 | 1 |
| Input Voltage (Min) | 2.9V | 2.5V |
| Input Voltage (Max) | 5.5V | 5.5V |
| Output Voltage | Fixed 1.2V | Adjustable 0.6V to 5.5V |
| Output Current | 1A | 1A |
| Switching Frequency | 2.5MHz | 1.5MHz |
| Synchronous Rectifier | Yes | Yes |
| Package / Case | SOT-23-5 (SC-74A) | SOT-23-5 Thin (TSOT-23-5) |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C to 125°C (TJ) | -40°C to 85°C (TA) |
| RoHS Status | RoHS Compliant | ROHS3 Compliant |
| Product Status | Not For New Designs | Active |
Engineering Selection Recommendations
The PAM2312AABADJ is the manufacturer-recommended substitute for the SC4626CSKTRT. Selection should be based on the following factors:
Product Status: The SC4626CSKTRT is classified as not for new designs, whereas the PAM2312AABADJ maintains active product status with ongoing manufacturer support and availability.
Compliance & Certifications: Both parts are RoHS compliant. The PAM2312AABADJ carries ROHS3 compliance and REACH unaffected status, providing enhanced regulatory alignment for current applications.
Thermal Operating Range: The SC4626CSKTRT operates to 125°C junction temperature, while the PAM2312AABADJ operates to 85°C ambient temperature. Applications requiring operation above 85°C ambient must account for this difference.
Package Compatibility: Both devices use SOT-23-5 packages suitable for surface mount assembly. The PAM2312AABADJ uses a thin variant (TSOT-23-5), which is mechanically compatible with standard SOT-23-5 footprints.
Output Voltage Configuration: The SC4626CSKTRT provides fixed 1.2V output, while the PAM2312AABADJ requires external resistor configuration to set output voltage. Design modifications are necessary to achieve 1.2V output with the substitute part.
Frequently Asked Questions (FAQ)
Q: Can the PAM2312AABADJ directly replace the SC4626CSKTRT without circuit modifications?
A: No. The SC4626CSKTRT provides fixed 1.2V output, while the PAM2312AABADJ requires external resistor divider networks to set output voltage. Circuit redesign is necessary to configure the PAM2312AABADJ for 1.2V output.
Q: Are the packages physically compatible?
A: Yes. Both parts use SOT-23-5 packages. The PAM2312AABADJ uses a thin variant (TSOT-23-5), which is mechanically compatible with standard SOT-23-5 PCB footprints.
Q: What is the temperature operating difference between these parts?
A: The SC4626CSKTRT operates to 125°C junction temperature, while the PAM2312AABADJ operates to 85°C ambient temperature. Applications operating in high-temperature environments must verify the PAM2312AABADJ meets thermal requirements.
Q: Do both parts support the same input voltage range?
A: The input voltage ranges are similar but not identical. The SC4626CSKTRT operates from 2.9V to 5.5V, while the PAM2312AABADJ operates from 2.5V to 5.5V. The PAM2312AABADJ provides lower minimum input voltage support.
Q: What is the switching frequency difference?
A: The SC4626CSKTRT operates at 2.5MHz, while the PAM2312AABADJ operates at 1.5MHz. This difference affects output filter design and EMI characteristics.
Q: Are both parts RoHS compliant?
A: Yes. The SC4626CSKTRT is RoHS compliant, and the PAM2312AABADJ is ROHS3 compliant, meeting current regulatory requirements.
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