| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| LM2991S/NOPB | Texas Instruments | $4.5039 | Adjustable Negative LDO Regulator, 3V Min, 24V Max, 1V Dropout, BIPolar, PSSO5 | LM2991S vs LM2991S/NOPB |
| LM2991S/NOPB | National Semiconductor Corporation | Check for Price | Adjustable Negative LDO Regulator, 3V Min, 24V Max, 1V Dropout, BIPolar, PSSO5 | LM2991S vs LM2991S/NOPB |
| LM2991SX | National Semiconductor Corporation | Check for Price | Adjustable Negative LDO Regulator, 3V Min, 24V Max, 1V Dropout, BIPolar, PSSO5 | LM2991S vs LM2991SX |
| LM2991SX | Texas Instruments | Check for Price | Adjustable Negative LDO Regulator, 3V Min, 24V Max, 1V Dropout, BIPolar, PSSO5 | LM2991S vs LM2991SX |
Part Details for LM2991S by Texas Instruments
Results Overview of LM2991S by Texas Instruments
- Distributor Offerings: (5 listings)
- Number of FFF Equivalents: (4 replacements)
- Tariff Estimator: (Available) NEW
- Number of Functional Equivalents: (10 options)
- CAD Models: (Request Part)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Consumer Electronics
Energy and Power Systems
Transportation and Logistics
Renewable Energy
Automotive
LM2991S Information
LM2991S by Texas Instruments is a Linear Regulator IC.
Linear Regulator ICs are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Price & Stock for LM2991S
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
LM2991S-ND
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DigiKey | IC REG LINEAR NEG ADJ 1A TO263 Container: Tube |
0 Tube |
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Buy Now | |
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Quest Components | IC,VOLT REGULATOR,ADJUSTABLE,-2 TO -25V,BIPOLAR,SIP,5PIN,PLASTIC (Also Known As: LM2991SP+) | 2 |
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$7.0800 / $10.6200 | Buy Now |
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Quest Components | IC,VOLT REGULATOR,ADJUSTABLE,-2 TO -25V,BIPOLAR,SIP,5PIN,PLASTIC | 2 |
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$7.0800 / $10.6200 | Buy Now |
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Chip Stock | 1-A, negative, adjustable low-dropout voltage regulator with enable 5-DDPAK/TO-263 -40 to 125 | 3500 |
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RFQ | |
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Win Source Electronics | LDO Regulator Neg -3V to -24V 1A 6-Pin(5+Tab) DDPAK Tube / IC REG LDO NEG ADJ 1A DDPAK | 18500 |
|
$4.1123 / $5.2825 | Buy Now |
US Tariff Estimator: LM2991S by Texas Instruments
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
LM2991S Part Data Attributes
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LM2991S
Texas Instruments
Buy Now
Datasheet
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Compare Parts:
LM2991S
Texas Instruments
Adjustable Negative LDO Regulator, 3V Min, 24V Max, 1V Dropout, BIPolar, PSSO5
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| Pbfree Code | Yes | |
| Part Life Cycle Code | Obsolete | |
| Part Package Code | D2PAK | |
| Package Description | To-263, 5 Pin | |
| Pin Count | 4 | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.60 | |
| Date Of Intro | 1994-06-01 | |
| Adjustability | Adjustable | |
| Dropout Voltage1-Max | 1 V | |
| Dropout Voltage1-Nom | 0.6 V | |
| Input Voltage-Max | 0.3 V | |
| Input Voltage-Min | 26 V | |
| JESD-30 Code | R-PSSO-G5 | |
| JESD-609 Code | e0 | |
| Length | 10.16 Mm | |
| Line Regulation-Max (%/V) | 0.04 | |
| Load Regulation-Max(%) | 0.4% | |
| Moisture Sensitivity Level | 3 | |
| Number of Functions | 1 | |
| Number of Outputs | 1 | |
| Number of Terminals | 5 | |
| Operating Temperature TJ-Max | 125 °C | |
| Operating Temperature TJ-Min | -40 °C | |
| Output Current1-Max | 1 A | |
| Output Voltage1-Max | 24 V | |
| Output Voltage1-Min | 3 V | |
| Package Body Material | Plastic/Epoxy | |
| Package Code | TO-263 | |
| Package Equivalence Code | SMSIP5H,.6,67TB | |
| Package Shape | Rectangular | |
| Package Style | Small Outline | |
| Packing Method | Tube | |
| Peak Reflow Temperature (Cel) | 235 | |
| Qualification Status | Not Qualified | |
| Regulator Type | Adjustable Negative Single Output Ldo Regulator | |
| Seated Height-Max | 4.8 Mm | |
| Surface Mount | Yes | |
| Technology | Bipolar | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Form | Gull Wing | |
| Terminal Pitch | 1.7 Mm | |
| Terminal Position | Single | |
| Time@Peak Reflow Temperature-Max (s) | 20 | |
| Voltage Tolerance-Max | 5% | |
| Width | 8.64 Mm |
Alternate Parts for LM2991S
This table gives cross-reference parts and alternative options found for LM2991S. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of LM2991S, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
LM2991S Frequently Asked Questions (FAQ)
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The maximum input voltage that can be applied to the LM2991S is 40V, but it's recommended to keep it below 35V for reliable operation.
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To ensure stability, use a minimum output capacitance of 10uF with an ESR of 0.1-10 ohms, and keep the input capacitance below 10uF. Also, use a 1uF capacitor on the adjust pin to ground.
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The minimum input voltage required for the LM2991S to regulate properly is 7.5V, but it's recommended to keep it above 8.5V for reliable operation.
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The LM2991S is rated for operation up to 125°C, but its performance may degrade at high temperatures. Use a heat sink and ensure good airflow to keep the junction temperature below 125°C.
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The output voltage of the LM2991S can be adjusted by connecting a resistor divider network between the output and adjust pins. The ratio of the resistors determines the output voltage.