| Part Number | LT1959CR#TRPBF | LT1959IR#TRPBF | 
|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | 
| Category | PMIC - Voltage Regulators - DC DC Switching Regulators | PMIC - Voltage Regulators - DC DC Switching Regulators | 
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| Product Status | Active | Active | 
| Function | Step-Down | Step-Down | 
| Output Configuration | Positive | Positive | 
| Topology | Buck, SEPIC | Buck, SEPIC | 
| Output Type | Adjustable | Adjustable | 
| Number of Outputs | 1 | 1 | 
| Voltage - Input (Min) | 4.3V | 4.3V | 
| Voltage - Input (Max) | 15V | 15V | 
| Voltage - Output (Min/Fixed) | 1.21V | 1.21V | 
| Voltage - Output (Max) | 12.9V | 12.9V | 
| Current - Output | 4.5A (Switch) | 4.5A (Switch) | 
| Frequency - Switching | 500kHz | 500kHz | 
| Synchronous Rectifier | No | No | 
| Operating Temperature | 0°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | TO-263-8, D²Pak (7 Leads + Tab), TO-263CA | TO-263-8, D²Pak (7 Leads + Tab), TO-263CA | 
| Supplier Device Package | 7-DDPAK | 7-DDPAK |