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| Part Number | LP3991TL-0.8/NOPB | LP3991TLX-0.8/NOPB | LP3991TL-2.8/NOPB | LP3991TL-1.8/NOPB | LP3990TL-0.8/NOPB | 
|---|---|---|---|---|---|
| Manufacturer | National Semiconductor | National Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments | 
| Product Status | Active | Active | Active | Active | Active | 
| Output Configuration | Positive | Positive | Positive | Positive | Positive | 
| Output Type | Fixed | Fixed | Fixed | Fixed | Fixed | 
| Number of Regulators | 1 | 1 | 1 | 1 | 1 | 
| Voltage - Input (Max) | 4V | 4V | 4V | 4V | 6V | 
| Voltage - Output (Min/Fixed) | 0.8V | 0.8V | 2.8V | 1.8V | 0.8V | 
| Voltage - Output (Max) | - | - | - | - | - | 
| Voltage Dropout (Max) | 0.16V @ 300mA | 0.16V @ 300mA | 0.16V @ 300mA | 0.16V @ 300mA | 0.2V @ 150mA | 
| Current - Output | 300mA | 300mA | 300mA | 300mA | 150mA | 
| Current - Quiescent (Iq) | 100 µA | 100 µA | 100 µA | 100 µA | 80 µA | 
| Current - Supply (Max) | 225 µA | 225 µA | 225 µA | 225 µA | 120 µA | 
| PSRR | 65dB (1kHz) | 65dB (1kHz) | 65dB (1kHz) | 65dB (1kHz) | 55dB ~ 35dB (1kHz ~ 10kHz) | 
| Control Features | Enable | Enable | Enable | Enable | Enable | 
| Protection Features | Over Temperature, Short Circuit | Over Temperature, Short Circuit | Over Temperature, Short Circuit | Over Temperature, Short Circuit | Over Temperature, Short Circuit | 
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | 
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | 
| Package / Case | 4-WFBGA, DSBGA | 4-WFBGA, DSBGA | 4-WFBGA, DSBGA | 4-WFBGA, DSBGA | 4-WFBGA, DSBGA | 
| Supplier Device Package | 4-DSBGA (1x1) | 4-DSBGA (1x1) | 4-DSBGA (1x1) | 4-DSBGA (1x1) | 4-DSBGA (1x1) |