Alternatives to Texas Instruments LM2991S/NOPB
Texas Instruments LM2991S/NOPB and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 LM2991S/NOPBTexas Instruments | LM2991SX/NOPBTexas Instruments | LM2991T/NOPBTexas Instruments | +2more | |
|---|---|---|---|---|
| FFF Compatibility | This is the exact same silicon die and package as the queried part, differing only in the tape-and-reel packaging carrier. No PCB layout changes are required.Identical TO-263-5 (DDPAK) package dimensions and thermal characteristics.Identical -3V to -24V adjustable negative output range, 1A load current capability, and enable/shutdown logic. | The TO-220-5 is a through-hole package, making it physically incompatible with the surface-mount TO-263-5 (DDPAK) footprint.Requires a through-hole mounting scheme instead of a surface-mount pattern.Identical electrical behavior, safety protection limits, and voltage regulation specifications. | ||
 AI Summary | LM2991S/NOPB by Texas Instruments: Linear Voltage Regulator IC Negative Adjustable 1 Output 1A TO-263 (DDPAK-5). | This is the Tape & Reel packaging variant of the queried LM2991S/NOPB. It is a 100% direct drop-in replacement that requires no electrical or physical modifications.
| This is the through-hole (TO-220-5) package sibling of the LM2991 series. It is functionally identical but requires a board redesign if transitioning from an SMD layout.
| |
| Lifecycle Status | Active | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | Unknown | |
| RoHS | RoHS | RoHS | Unknown | |
| Description | Linear Voltage Regulator IC Negative Adjustable 1 Output 1A TO-263 (DDPAK-5) | Linear Voltage Regulator IC Negative Adjustable 1 Output 1A TO-263 (DDPAK-5) | LDO Voltage Regulators NEG LDO ADJ REG | |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | |
| Type | Power Management (PMIC) | Power Management (PMIC) | LDO Voltage Regulators | |
| Datasheet | Open | Open | N/A | |
| Lead Time | 26 weeks | 16 weeks | 16 weeks | |
| Country of Origin | MY | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0070 | - | - | |
| Moisture Sensitivity Level | 3 (168 Hours) | - | - | |
| PSRR | 60dB (1kHz) | - | - | |
| Output Type | Adjustable | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab), TO-263BA | - | - | |
| Control Features | Enable | - | - | |
| Current - Output | 1A | - | - | |
| Protection Features | Over Temperature, Short Circuit | - | - | |
| Number of Regulators | 1 | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 LM20BIM7/NOPBTexas Instruments | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 LM2674M-ADJ/NOPBTexas Instruments | In stock | Active | 5Alternatives availableSee Alternatives |
 LM2901Donsemi | In stock | Active | 5Alternatives availableSee Alternatives |
| LM2674MX-ADJ/NOPBTexas Instruments | In stock | Active | 5Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Texas Instruments LM2991S/NOPB is active and in production. The parts listed here are qualified equivalents if you need a second source or better availability.
The closest qualified second sources for the Texas Instruments LM2991S/NOPB are the LM2991SX/NOPB (Texas Instruments) and the LM2991T/NOPB (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 LM2991S/NOPB 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 LM2991S/NOPB (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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