| PartNumber | LT3991IDD#TRPBF | LT3991IDD#PBF | LT3991IMSE#PBF |
| Description | Switching Voltage Regulators 55V, 1.2A, 2MHz Step-Down Regulator with 2.8uA Quiescent Current | Switching Voltage Regulators 55V, 1.2A, 2MHz Step-Down Regulator with 2.8uA Quiescent Current | Switching Voltage Regulators 55V, 1.2A, 2MHz Step-Down Regulator with 2.8uA Quiescent Current |
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Product Category | Switching Voltage Regulators | Switching Voltage Regulators | Switching Voltage Regulators |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | DFN-10 | DFN-10 | MSOP-10 |
| Output Voltage | 1.19 V to 30 V | 1.19 V to 30 V | 1.19 V to 30 V |
| Output Current | 1.2 A | 1.2 A | 1.2 A |
| Number of Outputs | 1 Output | 1 Output | 1 Output |
| Input Voltage MAX | 55 V | 55 V | 55 V |
| Topology | Buck | Buck | Buck |
| Input Voltage MIN | 4.3 V | 4.3 V | 4.3 V |
| Switching Frequency | 2 MHz | 2000 kHz | 2000 kHz |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 125 C | + 125 C | + 125 C |
| Series | LT3991 | LT3991 | LT3991 |
| Packaging | Reel | Tube | Tube |
| Input Voltage | 4 V to 55 V | 4.3 V to 5.5 V | 4.3 V to 5.5 V |
| Operating Temperature Range | - 40 C to + 125 C | - 40 C to + 125 C | - 40 C to + 125 C |
| Quiescent Current | 2.8 uA | 2.8 uA | 2.8 uA |
| Type | Step Down Switching Regulator | Step-Down Regulator | Step-Down Regulator |
| Brand | Analog Devices / Linear Technology | Analog Devices / Linear Technology | Analog Devices / Linear Technology |
| Shutdown | Shutdown | Shutdown | Shutdown |
| Development Kit | DC1526A | DC1526A | DC1526A |
| Operating Supply Current | 0.0017 mA | 0.0017 mA | 0.0017 mA |
| Product Type | Switching Voltage Regulators | Switching Voltage Regulators | Switching Voltage Regulators |
| Factory Pack Quantity | 2500 | 121 | 50 |
| Subcategory | PMIC - Power Management ICs | PMIC - Power Management ICs | PMIC - Power Management ICs |
| Unit Weight | - | 0.005291 oz | - |