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| Part Number | LM2577S-12 | LM2577T-12 | LM2587S-12 | LM2577SX-12 | LM2576S-12 | LM2577M-12 | LM2577N-12 |
|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | National Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | National Semiconductor |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Not For New Designs | Obsolete | Active |
| Function | Step-Up, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | 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 or Negative | Positive | Positive or Negative | Positive | Positive or Negative | - |
| Topology | Boost, Flyback, Forward Converter | Boost, Flyback, Forward Converter | Boost, Flyback, Forward Converter | Boost, Flyback, Forward Converter | Buck | Boost, Flyback, Forward Converter | - |
| Output Type | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | - |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | - |
| Voltage - Input (Min) | 3.5V | 3.5V | 4V | 3.5V | 4V | 3.5V | - |
| Voltage - Input (Max) | 40V | 40V | 40V | 40V | 40V | 40V | - |
| Voltage - Output (Min/Fixed) | 12V | 12V | 12V | 12V | 12V | 12V | - |
| Voltage - Output (Max) | - | - | - | - | - | - | - |
| Current - Output | 3A (Switch) | 3A (Switch) | 5A (Switch) | 3A (Switch) | 3A | 3A (Switch) | - |
| Frequency - Switching | 52kHz | 52kHz | 100kHz | 52kHz | 52kHz | 52kHz | - |
| Synchronous Rectifier | No | No | 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) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | - |
| Mounting Type | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount | Surface Mount | - |
| Package / Case | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA | TO-220-5 | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA | 24-SOIC (0.295", 7.50mm Width) | - |
| Supplier Device Package | DDPAK/TO-263-5 | TO-220-5 | DDPAK/TO-263-5 | DDPAK/TO-263-5 | DDPAK/TO-263-5 | 24-SOIC | - |
