| Part Number | LTC3545EUD#PBF | LTC3544EUD#PBF | 
|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | 
| Category | PMIC - Voltage Regulators - DC DC Switching Regulators | PMIC - Voltage Regulators - DC DC Switching Regulators | 
|   |   | |
| Product Status | Active | Active | 
| Function | Step-Down | Step-Down | 
| Output Configuration | Positive | Positive | 
| Topology | Buck | Buck | 
| Output Type | Adjustable | Adjustable | 
| Number of Outputs | 3 | 4 | 
| Voltage - Input (Min) | 2.25V | 2.25V | 
| Voltage - Input (Max) | 5.5V | 5.5V | 
| Voltage - Output (Min/Fixed) | 0.6V | 0.8V | 
| Voltage - Output (Max) | 5.5V | 5.5V | 
| Current - Output | 800mA | 100mA, 200mA(2), 300mA | 
| Frequency - Switching | 2.25MHz | 2.25MHz | 
| Synchronous Rectifier | Yes | Yes | 
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 16-WFQFN Exposed Pad | 16-WFQFN Exposed Pad | 
| Supplier Device Package | 16-QFN (3x3) | 16-QFN (3x3) |