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| Part Number | MAX638AESA+ | MAX631AESA+ | MAX632AESA+ | MAX633AESA+ | MAX635AESA+ | MAX636AESA+ | MAX637AESA+ | MAX638ACSA+ | MAX638AEPA+ | MAX638AESA |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Product Status | Last Time Buy | Active | Active | Active | Active | Active | Active | Last Time Buy | Obsolete | Obsolete |
| Function | Step-Down | Step-Up | Step-Up | Step-Up | Step-Up, Step-Down | Step-Up, Step-Down | Step-Up, Step-Down | Step-Down | Step-Down | Step-Down |
| Output Configuration | Positive | Positive or Negative | Positive or Negative | Positive or Negative | Negative | Negative | Negative | Positive | Positive | Positive |
| Topology | Buck | Boost, Charge Pump | Boost, Charge Pump | Boost, Charge Pump | Buck | Buck | Buck | Buck | Buck | Buck |
| Output Type | Adjustable (Fixed) | Adjustable (Fixed) | Adjustable (Fixed) | Adjustable (Fixed) | Adjustable (Fixed) | Adjustable (Fixed) | Adjustable (Fixed) | Adjustable (Fixed) | Adjustable (Fixed) | Adjustable (Fixed) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Input (Min) | 2.2V | 2V | 2V | 2V | 2.3V | 2.3V | 2.3V | 2.2V | 2.2V | 2.2V |
| Voltage - Input (Max) | 16.5V | 16.5V | 16.5V | 16.5V | 16.5V | 16.5V | 16.5V | 16.5V | 16.5V | 16.5V |
| Voltage - Output (Min/Fixed) | 1.31V (5V) | 1.31V (5V) | 1.31V (12V) | 1.31V (15V) | -1.31V (-5V) | -1.31V (-12V) | -1.31V (-15V) | 1.31V (5V) | 1.31V (5V) | 1.31V (5V) |
| Voltage - Output (Max) | 16.5V | 18V (Switch) | 18V (Switch) | 18V (Switch) | -5V | -12V | -15V | 16.5V | 16.5V | 16.5V |
| Current - Output | - | 450mA (Switch) | 450mA (Switch) | 450mA (Switch) | 500mA | 200mA | 200mA | - | - | - |
| Frequency - Switching | 65kHz | 45kHz | 50kHz | 50kHz | 50kHz | 50kHz | 50kHz | 65kHz | 65kHz | 65kHz |
| Synchronous Rectifier | No | No | No | No | No | No | No | No | No | No |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Through Hole | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-DIP (0.300", 7.62mm) | 8-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-PDIP | 8-SOIC |
