Datasheet Linear Technology LT8641
| Manufacturer | Linear Technology |
| Series | LT8641 |
65V, 3.5A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current
Datasheets
LT8641 - 65V, 3.5A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current
PDF, 2.0 Mb, File uploaded: Sep 20, 2017
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Packaging
| LT8641EUDC#PBF | LT8641EUDC#TRPBF | LT8641IUDC#PBF | LT8641IUDC#TRPBF | |
|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 |
| Package | 3x4 QFN-18 Package Outline Drawing | 3x4 QFN-18 Package Outline Drawing | 3x4 QFN-18 Package Outline Drawing | 3x4 QFN-18 Package Outline Drawing |
| Package Code | UDC | UDC | UDC | UDC |
| Package Index | 05-08-1956 | 05-08-1956 | 05-08-1956 | 05-08-1956 |
| Pin Count | 18 | 18 | 18 | 18 |
Parametrics
| Parameters / Models | LT8641EUDC#PBF | LT8641EUDC#TRPBF | LT8641IUDC#PBF | LT8641IUDC#TRPBF |
|---|---|---|---|---|
| Architecture | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode |
| Demo Boards | DC2373A | DC2373A | DC2373A | DC2373A |
| Design Tools | LTspice File,LTpowerCAD File | LTspice File,LTpowerCAD File | LTspice File,LTpowerCAD File | LTspice File,LTpowerCAD File |
| Export Control | no | no | no | no |
| Features | Low EMI, Silent Switcher Architecture, Spread Spectrum, Burst Mode, Resistor Set Frequency, External Synchronization, Power Good | Low EMI, Silent Switcher Architecture, Spread Spectrum, Burst Mode, Resistor Set Frequency, External Synchronization, Power Good | Low EMI, Silent Switcher Architecture, Spread Spectrum, Burst Mode, Resistor Set Frequency, External Synchronization, Power Good | Low EMI, Silent Switcher Architecture, Spread Spectrum, Burst Mode, Resistor Set Frequency, External Synchronization, Power Good |
| Frequency, kHz | 3000 | 3000 | 3000 | 3000 |
| Frequency Adjust Range | 200kHz to 3MHz | 200kHz to 3MHz | 200kHz to 3MHz | 200kHz to 3MHz |
| Frequency Sync Range | 200kHz to 3MHz | 200kHz to 3MHz | 200kHz to 3MHz | 200kHz to 3MHz |
| Integrated Inductor | no | no | no | no |
| Ishutdown, µA | 0.75 | 0.75 | 0.75 | 0.75 |
| Isupply, mA | 0.0025 | 0.0025 | 0.0025 | 0.0025 |
| Monolithic | yes | yes | yes | yes |
| Number of Outputs | 1 | 1 | 1 | 1 |
| Operating Temperature Range, °C | 0 to 85 | 0 to 85 | -40 to 85 | -40 to 85 |
| Output Current, A | 3.5 | 3.5 | 3.5 | 3.5 |
| Polyphase | no | no | no | no |
| Switch Current, A | 5.8 | 5.8 | 5.8 | 5.8 |
| Synchronous | yes | yes | yes | yes |
| Topology | Buck | Buck | Buck | Buck |
| Topology 1 | Buck | Buck | Buck | Buck |
| Vin Max, V | 65 | 65 | 65 | 65 |
| Vin Min, V | 3 | 3 | 3 | 3 |
| Vout Max, V | 64 | 64 | 64 | 64 |
| Vout Min, V | 0.81 | 0.81 | 0.81 | 0.81 |
| Vref Accuracy Over Temp, % | 1.48 | 1.48 | 1.48 | 1.48 |
Eco Plan
| LT8641EUDC#PBF | LT8641EUDC#TRPBF | LT8641IUDC#PBF | LT8641IUDC#TRPBF | |
|---|---|---|---|---|
| RoHS | Compliant | Compliant | Compliant | Compliant |
Model Line
Series: LT8641 (4)
Manufacturer's Classification
- Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck | High Input Voltage Buck | Micropower Buck Regulators
- Power Management > Switching Regulator > Ultralow Noise Regulators