| Part Number | LTC1628CUH#PBF | LTC1628IUH#PBF | 
|---|---|---|
| Manufacturer | Linear Technology | Analog Devices Inc. | 
| Category | PMIC - Voltage Regulators - DC DC Switching Controllers | PMIC - Voltage Regulators - DC DC Switching Controllers | 
|   |   | |
| Product Status | Obsolete | Active | 
| Output Type | Transistor Driver | Transistor Driver | 
| Function | Step-Down | Step-Down | 
| Output Configuration | Positive | Positive | 
| Topology | Buck | Buck | 
| Number of Outputs | 2 | 2 | 
| Output Phases | 2 | 2 | 
| Voltage - Supply (Vcc/Vdd) | 3.5V ~ 30V | 3.5V ~ 30V | 
| Frequency - Switching | 220kHz, 140kHz ~ 310kHz | 220kHz | 
| Duty Cycle (Max) | 99.4% | 99.4% | 
| Synchronous Rectifier | Yes | Yes | 
| Clock Sync | No | No | 
| Serial Interfaces | - | - | 
| Control Features | Current Limit, Dead Time Control, Enable, Frequency Control, Power Good, Soft Start | Enable, Frequency Control, Power Good, Soft Start | 
| Operating Temperature | 0°C ~ 85°C | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 
| Supplier Device Package | 32-QFN (5x5) | 32-QFN (5x5) |