| Part Number | LTC3649EFE | LTC3649IFE | 
|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | 
| Category | PMIC - Voltage Regulators - DC DC Switching Regulators | PMIC - Voltage Regulators - DC DC Switching Regulators | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Function | Step-Down | Step-Down | 
| Output Configuration | Positive | Positive | 
| Topology | Buck | Buck | 
| Output Type | Adjustable | Adjustable | 
| Number of Outputs | 1 | 1 | 
| Voltage - Input (Min) | 3.1V | 3.1V | 
| Voltage - Input (Max) | 60V | 60V | 
| Voltage - Output (Min/Fixed) | 0V | 0V | 
| Voltage - Output (Max) | 55V | 55V | 
| Current - Output | 4A | 4A | 
| Frequency - Switching | 1MHz | 1MHz | 
| Synchronous Rectifier | Yes | Yes | 
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 28-TSSOP (0.173", 4.40mm Width) Exposed Pad | 28-TSSOP (0.173", 4.40mm Width) Exposed Pad | 
| Supplier Device Package | 28-TSSOP-EP | 28-TSSOP-EP |