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| Part Number | LM2599S-ADJ | LM2599T-ADJ | LM2599SX-ADJ | LM2598S-ADJ |
|---|---|---|---|---|
| Manufacturer | National Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Not For New Designs | Obsolete | Obsolete |
| Function | Step-Down | Step-Down | Step-Down | Step-Down |
| Output Configuration | Positive | Positive | Positive | Positive |
| Topology | Buck | Buck | Buck | Buck |
| Output Type | Adjustable | Adjustable | Adjustable | Adjustable |
| Number of Outputs | 1 | 1 | 1 | 1 |
| Voltage - Input (Min) | 4.5V | 4.5V | 4.5V | 4.5V |
| Voltage - Input (Max) | 40V | 40V | 40V | 40V |
| Voltage - Output (Min/Fixed) | 1.23V | 1.23V | 1.23V | 1.2V |
| Voltage - Output (Max) | 37V | 37V | 37V | 37V |
| Current - Output | 3A | 3A | 3A | 1A |
| Frequency - Switching | 150kHz | 150kHz | 150kHz | 150kHz |
| Synchronous Rectifier | No | No | No | No |
| Operating Temperature | -40°C ~ 125°C | -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 |
| Package / Case | TO-263-8, D²Pak (7 Leads + Tab), TO-263CA | TO-220-7 Formed Leads | TO-263-8, D²Pak (7 Leads + Tab), TO-263CA | TO-263-8, D²Pak (7 Leads + Tab), TO-263CA |
| Supplier Device Package | DDPAK/TO-263-7 | TO-220-7 | DDPAK/TO-263-7 | DDPAK/TO-263-7 |
