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| Part Number | LP2954IS | LP2954ISX | LP2954IT | LP2957IS | LP2954AIS | LP2954IM | 
|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | National Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments | National Semiconductor | 
| Product Status | Obsolete | Active | Obsolete | Obsolete | Obsolete | Active | 
| Output Configuration | Positive | Positive | Positive | Positive | Positive | Positive | 
| Output Type | Fixed | Fixed | Fixed | Fixed | Fixed | Adjustable | 
| Number of Regulators | 1 | 1 | 1 | 1 | 1 | 1 | 
| Voltage - Input (Max) | 30V | 30V | 30V | 30V | 30V | 30V | 
| Voltage - Output (Min/Fixed) | 5V | 5V | 5V | 5V | 5V | 1.23V | 
| Voltage - Output (Max) | - | - | - | - | - | 29V | 
| Voltage Dropout (Max) | 0.8V @ 250mA | 0.8V @ 250mA | 0.8V @ 250mA | 0.8V @ 250mA | 0.8V @ 250mA | 0.8V @ 250mA | 
| Current - Output | 250mA | 250mA | 250mA | 250mA | 250mA | 250mA | 
| Current - Quiescent (Iq) | 150 µA | 150 µA | 150 µA | 200 µA | 150 µA | 150 µA | 
| Current - Supply (Max) | 33 mA | 33 mA | 33 mA | 33 mA | 33 mA | 33 mA | 
| PSRR | - | - | - | - | - | - | 
| Control Features | Enable | Enable | Enable | Enable | Enable | Enable | 
| Protection Features | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity | 
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | 
| Mounting Type | Surface Mount | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount | 
| Package / Case | TO-263-4, D²Pak (3 Leads + Tab), TO-263AA | TO-263-4, D²Pak (3 Leads + Tab), TO-263AA | TO-220-3 | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA | TO-263-4, D²Pak (3 Leads + Tab), TO-263AA | 8-SOIC (0.154", 3.90mm Width) | 
| Supplier Device Package | DDPAK/TO-263-3 | DDPAK/TO-263-3 | TO-220-3 | DDPAK/TO-263-5 | DDPAK/TO-263-3 | 8-SOIC |