| PartNumber | LM4991MAX/NOPB | LM4992SD/NOPB | LM4991MA/NOPB |
| Description | Audio Amplifiers 3W Audio Power Amplifier with Shutdown M | Audio Amplifiers 420mW Stereo Cell Phone Audio Amplifier | Audio Amplifiers 3W Audio Power Amplifier with Shutdown M |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Category | Audio Amplifiers | Audio Amplifiers | Audio Amplifiers |
| RoHS | Y | Y | Y |
| Series | LM4991 | LM4992 | LM4991 |
| Product | Audio Amplifiers | Audio Amplifiers | Audio Amplifiers |
| Class | Class-AB | Class-AB | Class-AB |
| Output Power | 3 W | 1.07 W | 3 W |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOIC-8 | WSON-14 | SOIC-8 |
| Audio Load Impedance | 3 Ohms | - | 3 Ohms |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 2.2 V | 2.2 V | 2.2 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Reel | Reel | Tube |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 1 Channel | 2 Channel | 1 Channel |
| Operating Supply Voltage | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.2 V to 5.5 V |
| Product Type | Audio Amplifiers | Audio Amplifiers | Audio Amplifiers |
| PSRR Power Supply Rejection Ratio | 64 dB | 55 dB | 64 dB |
| Factory Pack Quantity | 2500 | 1000 | 95 |
| Subcategory | Audio ICs | Audio ICs | Audio ICs |
| Unit Weight | 0.002677 oz | 0.000903 oz | 0.002677 oz |
| Type | - | Stereo | Mono |
| THD plus Noise | - | 0.15 % | 0.2 % |
| Supply Type | - | Single | Single |
| Development Kit | - | LM4992SDBD | - |
| Operating Supply Current | - | 7 mA | 4 mA |