| PartNumber | MAX639ESA+ | MAX639EPA+ | MAX639ESA+T |
| Description | Switching Voltage Regulators 5/3.3/3V Adjustable Step-Down | Switching Voltage Regulators 5/3.3/3V Adjustable Step-Down | Switching Voltage Regulators 5/3.3/3V Adjustable Step-Down |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Switching Voltage Regulators | Switching Voltage Regulators | Switching Voltage Regulators |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | Through Hole | SMD/SMT |
| Package / Case | SO-8 | PDIP-8 | SOIC-Narrow-8 |
| Output Voltage | 5 V | 5 V | 5 V |
| Output Current | 225 mA | 225 mA | 225 mA |
| Number of Outputs | 1 Output | 1 Output | 1 Output |
| Input Voltage MAX | 11.5 V | 11.5 V | 11.5 V |
| Topology | Buck | Buck | Buck |
| Input Voltage MIN | 4 V | 4 V | 4 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Series | MAX639 | MAX639 | MAX639 |
| Packaging | Tube | Tube | Reel |
| Type | Voltage Converter | Voltage Converter | Voltage Converter |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Type | Switching Voltage Regulators | Switching Voltage Regulators | Switching Voltage Regulators |
| Factory Pack Quantity | 100 | 50 | 2500 |
| Subcategory | PMIC - Power Management ICs | PMIC - Power Management ICs | PMIC - Power Management ICs |
| Part # Aliases | MAX639 | MAX639 | MAX639 |
| Unit Weight | 0.017870 oz | 0.032805 oz | 0.006596 oz |