Alternatives to Texas Instruments LP3966ES-3.3
Texas Instruments LP3966ES-3.3 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 LP3966ES-3.3Texas Instruments |  LP3966ES-3.3/NOPBTexas Instruments |  LT1764EQ-3.3#PBFAnalog Devices Inc. | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Identical pinout including Shutdown on Pin 1 and SENSE on Pin 5.Same physical DDPAK-5 / TO-263-5 footprint.Matches all absolute maximum ratings and electrical specifications. | Perfectly matches the pin assignment and functionality, including Shutdown logic on Pin 1 and SENSE on Pin 5.Standard 5-lead DDPAK (TO-263-5) package.Meets or exceeds all performance specs, offering better transient response and higher input safety ceiling. | ||
 AI Summary | LP3966ES-3.3 by Texas Instruments: Linear Voltage Regulator IC Positive Fixed 1 Output 3A TO-263 (DDPAK-5). | This is the official lead-free and RoHS-compliant direct equivalent of the obsolete LP3966ES-3.3, offering identical performance and zero redesign risk.
| An exceptionally high-performance alternative from Analog Devices that serves as a direct, pin-compatible drop-in with superior electrical specifications.
| |
| Lifecycle Status | Obsolete | Active | Unknown | |
| Market Availability | Discontinued | In stock | Unknown | |
| REACH | REACH | REACH | Unknown | |
| RoHS | RoHS | RoHS | Unknown | |
| Description | Linear Voltage Regulator IC Positive Fixed 1 Output 3A TO-263 (DDPAK-5) | Linear Voltage Regulator IC Positive Fixed 1 Output 3A TO-263 (DDPAK-5) | An exceptionally high-performance alternative from Analog Devices that serves as a direct, pin-compatible drop-in with superior electrical s | |
| Manufacturer | Texas Instruments | Texas Instruments | Analog Devices Inc. | |
| Type | Power Management (PMIC) | Power Management (PMIC) | Component | |
| Datasheet | Open | Open | N/A | |
| Lead Time | 6 weeks | 16 weeks | Unknown | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0090 | - | - | |
| Moisture Sensitivity Level | 3 (168 Hours) | - | - | |
| Output Type | Fixed | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab), TO-263BA | - | - | |
| Control Features | Enable | - | - | |
| Current - Output | 3A | - | - | |
| Protection Features | Over Current, Over Temperature, Short Circuit | - | - | |
| Number of Regulators | 1 | - | - | |
| Output Configuration | Positive | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 LP3966ESX-ADJTexas Instruments | In stock | Obsolete | 5Alternatives availableSee Alternatives |
| LP3961ES-1.8Texas Instruments | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
| LP3965ES-5.0 NOPBTexas Instruments | Non-stock | Obsolete | 2Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Texas Instruments LP3966ES-3.3 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 Texas Instruments LP3966ES-3.3 are the LP3966ES-3.3/NOPB (Texas Instruments) and the LT1764EQ-3.3#PBF (Analog Devices Inc.), 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 LP3966ES-3.3 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 LP3966ES-3.3 (Texas Instruments) 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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