| Part Number | MAX637AEPA+ | MAX638AEPA+ | 
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | 
| Category | PMIC - Voltage Regulators - DC DC Switching Regulators | PMIC - Voltage Regulators - DC DC Switching Regulators | 
|   |   | |
| Product Status | Active | Obsolete | 
| Function | Step-Up, Step-Down | Step-Down | 
| Output Configuration | Negative | Positive | 
| Topology | Buck | Buck | 
| Output Type | Adjustable (Fixed) | Adjustable (Fixed) | 
| Number of Outputs | 1 | 1 | 
| Voltage - Input (Min) | 2.3V | 2.2V | 
| Voltage - Input (Max) | 16.5V | 16.5V | 
| Voltage - Output (Min/Fixed) | -1.31V (-15V) | 1.31V (5V) | 
| Voltage - Output (Max) | -15V | 16.5V | 
| Current - Output | 200mA | - | 
| Frequency - Switching | 50kHz | 65kHz | 
| Synchronous Rectifier | No | No | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Through Hole | Through Hole | 
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 
| Supplier Device Package | 8-PDIP | 8-PDIP |