Alternatives to onsemi FAN1589MX
onsemi FAN1589MX and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 FAN1589MXonsemi |  LM1085IS-ADJ/NOPBTexas Instruments | LM1084IS-ADJ/NOPBTexas Instruments | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Pin 1 functions as ADJ instead of GND. Grounding Pin 1 directly on the existing PCB layout sets the output to its reference voltage of 1.25V instead of the original 1.20V.Identical TO-263-3 package dimensions and surface-mount footprint.The output voltage is 1.25V when Pin 1 is grounded, which is a +4% deviation from the original 1.20V. Grounding ADJ bypasses feedback control, but external resistors can be added to set other voltages. | Pin 1 functions as ADJ instead of GND. Grounding Pin 1 directly on the existing PCB layout sets the output to its reference voltage of 1.25V instead of the original 1.20V.Identical TO-263-3 package dimensions and surface-mount footprint.The output voltage is 1.25V when Pin 1 is grounded, which is a +4% deviation from the original 1.20V. Grounding ADJ bypasses feedback control, but external resistors can be added to set other voltages. | ||
 AI Summary | FAN1589MX by onsemi: - Controller, Intel VRM8.5 Voltage Regulator IC 1 Output TO-263-3. | The LM1085IS-ADJ/NOPB is a widely available 3A adjustable LDO regulator in an identical TO-263-3 package. Grounding its ADJ pin directly on the existing footprint results in an output of 1.25V, making it a highly compatible functional replacement for applications that can tolerate a slight voltage increase.
| The LM1084IS-ADJ/NOPB offers a robust 5A output capability in the same TO-263-3 package, providing substantial safety and thermal margins. Like the LM1085, grounding the ADJ pin on the original layout will produce a 1.25V output.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | - Controller, Intel VRM8.5 Voltage Regulator IC 1 Output TO-263-3 | Linear Voltage Regulator IC Positive Adjustable 1 Output 3A TO-263 (DDPAK-3) | Linear Voltage Regulator IC Positive Adjustable 1 Output 5A TO-263 (DDPAK-3) | |
| Manufacturer | onsemi | Texas Instruments | Texas Instruments | |
| Type | Power Management (PMIC) | Power Management (PMIC) | Power Management (PMIC) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 4 weeks | 16 weeks | 9 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0090 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Applications | Controller, Intel VRM8.5 | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | TO-263-4, D2PAK (3 Leads + Tab), TO-263AA | - | - | |
| Voltage - Input | 3.3V ~ 7V | - | - | |
| Voltage - Output | 1.2V | - | - | |
| Number of Outputs | 1 | - | - | |
| Operating Temperature | 0°C ~ 125°C | - | - | |
| Supplier Device Package | TO-263-3 | - | - |
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Frequently asked questions
Yes. The onsemi FAN1589MX 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 onsemi FAN1589MX are the LM1085IS-ADJ/NOPB (Texas Instruments) and the LM1084IS-ADJ/NOPB (Texas Instruments), out of 3 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 FAN1589MX 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 FAN1589MX (onsemi) 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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