| PartNumber | LT3669EUFD#PBF | LT3668IMSE#PBF | LT3668IMSE#TRPBF |
| Description | Interface - Specialized Industrial Transceiver with Integrated Step-Down Regulator and LDO | Switching Voltage Regulators 40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs | Switching Voltage Regulators 40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs |
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Product Category | Interface - Specialized | Switching Voltage Regulators | Switching Voltage Regulators |
| RoHS | Y | Y | Y |
| Package / Case | QFN-28 | MSOP-16 | MSOP-16 |
| Packaging | Tube | Tube | Reel |
| Series | LT3669 | LT3668 | LT3668 |
| Brand | Analog Devices / Linear Technology | Analog Devices / Linear Technology | Analog Devices / Linear Technology |
| Product Type | Interface - Specialized | Switching Voltage Regulators | Switching Voltage Regulators |
| Factory Pack Quantity | 73 | 37 | 2500 |
| Subcategory | Interface ICs | PMIC - Power Management ICs | PMIC - Power Management ICs |
| Unit Weight | 0.000882 oz | 0.011676 oz | - |
| Mounting Style | - | SMD/SMT | SMD/SMT |
| Output Voltage | - | 39.4 V | 39.4 V |
| Output Current | - | 0.4 A | 0.4 A |
| Number of Outputs | - | 3 Output | 3 Output |
| Input Voltage MAX | - | 40 V | 40 V |
| Topology | - | Buck | Buck |
| Input Voltage MIN | - | 4.3 V | 4.3 V |
| Switching Frequency | - | 2.2 MHz | 2.2 MHz |
| Minimum Operating Temperature | - | - 40 C | - 40 C |
| Maximum Operating Temperature | - | + 125 C | + 125 C |
| Input Voltage | - | 4.3 V to 40 V | 4.3 V to 40 V |
| Operating Temperature Range | - | - 40 C to + 125 C | - 40 C to + 125 C |
| Quiescent Current | - | 0.01 uA | 0.01 uA |
| Type | - | Step Down Switching Regulator | Step Down Switching Regulator |
| Shutdown | - | Shutdown | Shutdown |
| Development Kit | - | DC2243A | DC2243A |
| Operating Supply Current | - | 0.050 mA | 0.050 mA |