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| PartNumber | LM2991T | LM2991T/LB03 | LM2991T-ADJ |
| Description | LDO Voltage Regulators Negative LDO Adj Reg | LDO Voltage Regulators NRND, alternate is LM2991T/NOPB | |
| Manufacturer | Texas Instruments | Texas Instruments | - |
| Product Category | LDO Voltage Regulators | LDO Voltage Regulators | - |
| RoHS | N | N | - |
| Mounting Style | Through Hole | Through Hole | - |
| Package / Case | TO-220-5 | TO-220-5 | - |
| Output Voltage | - 24 V to - 3 V | - 3 V to - 24 V | - |
| Output Current | 1 A | 1 A | - |
| Number of Outputs | 1 Output | 1 Output | - |
| Polarity | Negative | Negative | - |
| Quiescent Current | 5 mA | 5 mA | - |
| Input Voltage MAX | 300 mV | 300 mV | - |
| Input Voltage MIN | - 26 V | - 26 V | - |
| Output Type | Adjustable | Adjustable | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 125 C | + 125 C | - |
| Dropout Voltage | 600 mV | 600 mV | - |
| Series | LM2991 | LM2991 | - |
| Packaging | Tube | Tube | - |
| Operating Temperature Range | - 40 C to + 125 C | - 40 C to + 125 C | - |
| Product | Negative LDO Adjustable Regulators | - | - |
| Type | Output Voltage Adjustable | - | - |
| Brand | Texas Instruments | Texas Instruments | - |
| Dropout Voltage Max | 0.2 V at 100 mA, 0.8 V at 1 A | 0.2 V at 100 mA | - |
| PSRR / Ripple Rejection Typ | 60 dB | - | - |
| Ib Input Bias Current | 700 uA | 700 uA | - |
| Line Regulation | 0.04 %/V | 0.04 %/V | - |
| Load Regulation | 0.4 % | 0.4 % | - |
| Operating Supply Current | 700 uA | 700 uA | - |
| Product Type | LDO Voltage Regulators | LDO Voltage Regulators | - |
| Reference Voltage | - 1.186 V | - 1.186 V | - |
| Factory Pack Quantity | 45 | 45 | - |
| Subcategory | PMIC - Power Management ICs | PMIC - Power Management ICs | - |
| Unit Weight | 0.105822 oz | 0.105822 oz | - |