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| Part Number | LM2577SX-ADJ | LM2587SX-ADJ | LM2577MX-ADJ | LM2577S-ADJ |
|---|---|---|---|---|
| Manufacturer | Texas Instruments | National Semiconductor | Texas Instruments | Texas Instruments |
| Product Status | Not For New Designs | Active | Obsolete | Not For New Designs |
| 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 |
| Output Configuration | Positive or Negative | Positive | Positive or Negative | Positive or Negative |
| Topology | Boost, Flyback, Forward Converter | Boost, Flyback, Forward Converter | Boost, Flyback, Forward Converter | Boost, Flyback, Forward Converter |
| Output Type | Adjustable | Adjustable | Adjustable | Adjustable |
| Number of Outputs | 1 | 1 | 1 | 1 |
| Voltage - Input (Min) | 3.5V | 4V | 3.5V | 3.5V |
| Voltage - Input (Max) | 40V | 40V | 40V | 40V |
| Voltage - Output (Min/Fixed) | 1.23V | 1.23V | 1.23V | 1.23V |
| Voltage - Output (Max) | 60V (Switch) | 60V | 60V (Switch) | 60V (Switch) |
| Current - Output | 3A (Switch) | 5A (Switch) | 3A (Switch) | 3A (Switch) |
| Frequency - Switching | 52kHz | 100kHz | 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 | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 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) | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA |
| Supplier Device Package | DDPAK/TO-263-5 | DDPAK/TO-263-5 | 24-SOIC | DDPAK/TO-263-5 |
