| Part Number | LTC1551LCS8#PBF | LTC1551LCMS8#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-Up/Step-Down | Step-Up/Step-Down | 
| Output Configuration | Negative | Negative | 
| Topology | Charge Pump | Charge Pump | 
| Output Type | Adjustable | Adjustable | 
| Number of Outputs | 1 | 1 | 
| Voltage - Input (Min) | 2.7V | 2.7V | 
| Voltage - Input (Max) | 5.5V | 5.5V | 
| Voltage - Output (Min/Fixed) | -1.225V | -1.225V | 
| Voltage - Output (Max) | -4.8V | -4.8V | 
| Current - Output | 20mA | 20mA | 
| Frequency - Switching | 900kHz | 900kHz | 
| Synchronous Rectifier | No | No | 
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 
| Supplier Device Package | 8-SO | 8-MSOP |