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| Part Number | LM2577T-12/LF03 | LM2577T-15/LF03 | LM2576T-12/LF03 | LM2577T-12/LB03 |
|---|---|---|---|---|
| Manufacturer | National Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Obsolete | Active | Obsolete |
| Function | Step-Up, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | Step-Down | Step-Up, Step-Up/Step-Down |
| Output Configuration | Positive or Negative | Positive | Positive | Positive |
| Topology | Boost, Flyback, Forward Converter | Boost, Flyback, Forward Converter | Buck | Boost, Flyback, Forward Converter |
| Output Type | Fixed | Fixed | Fixed | Fixed |
| Number of Outputs | 1 | 1 | 1 | 1 |
| Voltage - Input (Min) | 3.5V | 3.5V | 4V | 3.5V |
| Voltage - Input (Max) | 40V | 40V | 40V | 40V |
| Voltage - Output (Min/Fixed) | 12V | 15V | 12V | 12V |
| Voltage - Output (Max) | - | - | - | - |
| Current - Output | 3A (Switch) | 3A (Switch) | 3A | 3A (Switch) |
| Frequency - Switching | 52kHz | 52kHz | 52kHz | 52kHz |
| Synchronous Rectifier | No | No | No | No |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | TO-220-5 Formed Leads | TO-220-5 Formed Leads | TO-220-5 Formed Leads | TO-220-5 Formed Leads |
| Supplier Device Package | TO-220-5 | TO-220-5 | TO-220-5 | TO-220-5 |
