| Part Number | UCC28C42DGK | UCC28C42DG4 | 
|---|---|---|
| Manufacturer | Unitrode | Texas Instruments | 
| Category | PMIC - Voltage Regulators - DC DC Switching Controllers | PMIC - Voltage Regulators - DC DC Switching Controllers | 
|   |   | |
| Product Status | Active | Discontinued at Digi-Key | 
| Output Type | Transistor Driver | Transistor Driver | 
| Function | Step-Up, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | 
| Output Configuration | Positive | Positive | 
| Topology | Boost, Flyback, Forward Converter | Boost, Flyback, Forward Converter | 
| Number of Outputs | 1 | 1 | 
| Output Phases | 1 | 1 | 
| Voltage - Supply (Vcc/Vdd) | 9V ~ 18V | 9V ~ 18V | 
| Frequency - Switching | Up to 1MHz | Up to 1MHz | 
| Duty Cycle (Max) | 96% | 96% | 
| Synchronous Rectifier | No | No | 
| Clock Sync | No | No | 
| Serial Interfaces | - | - | 
| Control Features | Frequency Control | Frequency Control | 
| Operating Temperature | -40°C ~ 105°C (TJ) | -40°C ~ 105°C (TJ) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-SOIC (0.154", 3.90mm Width) | 
| Supplier Device Package | 8-VSSOP | 8-SOIC |