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| Part Number | LP3991TLX-1.5/NOPB | LP3991TLX-1.8/NOPB | LP3991TLX-2.5/NOPB | LP3991TLX-1.7/NOPB | LP3991TLX-1.55/NOPB | LP3990TLX-1.5/NOPB | LP3991TL-1.5/NOPB | LP3991TLX-1.2/NOPB | LP3991TLX-1.3/NOPB |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | National Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Active | Obsolete | Active | Active | Active | Active |
| Output Configuration | Positive | Positive | Positive | - | Positive | Positive | Positive | Positive | Positive |
| Output Type | Fixed | Fixed | Fixed | - | Fixed | Fixed | Fixed | Fixed | Fixed |
| Number of Regulators | 1 | 1 | 1 | - | 1 | 1 | 1 | 1 | 1 |
| Voltage - Input (Max) | 4V | 4V | 4V | - | 4V | 6V | 4V | 4V | 4V |
| Voltage - Output (Min/Fixed) | 1.5V | 1.8V | 2.5V | - | 1.55V | 1.5V | 1.5V | 1.2V | 1.3V |
| Voltage - Output (Max) | - | - | - | - | - | - | - | - | - |
| Voltage Dropout (Max) | 0.16V @ 300mA | 0.16V @ 300mA | 0.16V @ 300mA | - | 0.16V @ 300mA | 0.2V @ 150mA | 0.16V @ 300mA | 0.16V @ 300mA | 0.16V @ 300mA |
| Current - Output | 300mA | 300mA | 300mA | - | 300mA | 150mA | 300mA | 300mA | 300mA |
| Current - Quiescent (Iq) | 100 µA | 100 µA | 100 µA | - | 100 µA | 80 µA | 100 µA | 100 µA | 100 µA |
| Current - Supply (Max) | 225 µA | 225 µA | 225 µA | - | 225 µA | 120 µA | 225 µA | 225 µA | 225 µA |
| PSRR | 65dB (1kHz) | 65dB (1kHz) | 65dB (1kHz) | - | 65dB (1kHz) | 55dB ~ 35dB (1kHz ~ 10kHz) | 65dB (1kHz) | 65dB (1kHz) | 65dB (1kHz) |
| Control Features | Enable | Enable | Enable | - | 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 | 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 | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | - | 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 | 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) | 4-DSBGA (1x1) | 4-DSBGA (1x1) | 4-DSBGA (1x1) |
