Alternatives to STMicroelectronics SG3525AN
STMicroelectronics SG3525AN and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 SG3525ANSTMicroelectronics | SG3525ANSTMicroelectronics | UC3525ANTexas Instruments | +2more | |
|---|---|---|---|---|
| FFF Compatibility | The STMicroelectronics SG3525AN shares the exact same PDIP-16 package and pin assignments as the obsolete onsemi device.Both parts use the standard 16-pin dual in-line package (0.300-inch width) with equivalent dimensions.Both controllers share identical electrical characteristics, including an 8V to 35V supply voltage range, 100 Hz to 400 kHz switching frequency range, and 5.1V reference. | The TI UC3525AN has the same 16-PDIP footprint and pinout layout as the onsemi SG3525AN.Both parts utilize a standard 16-pin plastic DIP package.The functional characteristics, reference voltage (5.1V), and frequency capabilities (100 Hz to 400 kHz) are fully equivalent. | ||
 AI Summary | SG3525AN by STMicroelectronics: Push-Pull Regulator Positive Output Step-Up/Step-Down DC-DC Controller IC 16-PDIP. | This is a direct, active drop-in replacement with the identical part number from STMicroelectronics. It shares the same electrical parameters, pinout, and package style as the obsolete onsemi version, making it the highest-confidence second-source option.
| The UC3525AN is Texas Instruments' directly equivalent second-source controller for the SG3525A series. It is a fully pin-compatible and functionally identical drop-in alternative that remains active and widely supported.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Push-Pull Regulator Positive Output Step-Up/Step-Down DC-DC Controller IC 16-PDIP | Buck, Push-Pull Regulator Positive Output Step-Down, Step-Up/Step-Down DC-DC Controller IC 16-DIP | Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Down, Step-Up/Step-Down DC-DC Controller IC 16-PDIP | |
| Manufacturer | STMicroelectronics | STMicroelectronics | Texas Instruments | |
| Type | Power Management (PMIC) | Power Management (PMIC) | Power Management (PMIC) | |
| Datasheet | Open | Open | Open | |
| Lead Time | Unknown | 52 weeks | 16 weeks | |
| Country of Origin | US | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0070 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Function | Step-Up/Step-Down | - | - | |
| Topology | Push-Pull | - | - | |
| Clock Sync | Yes | - | - | |
| Output Type | Transistor Driver | - | - | |
| Mounting Type | Through Hole | - | - | |
| Output Phases | 1 | - | - | |
| Package / Case | 16-DIP (0.300", 7.62mm) | - | - | |
| Control Features | Enable, Frequency Control, Soft Start | - | - |
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Frequently asked questions
Yes. The STMicroelectronics SG3525AN is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the STMicroelectronics SG3525AN are the SG3525AN (STMicroelectronics) and the UC3525AN (Texas Instruments), out of 4 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the SG3525AN are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The SG3525AN (STMicroelectronics) is a part in the Power Management (PMIC) category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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