Datasheet Linear Technology LT8640-1
| Manufacturer | Linear Technology |
| Series | LT8640-1 |
42V, 5A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current
Datasheets
LT8640/LT8640-1: 42V, 5A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current Data Sheet
PDF, 1.7 Mb, File uploaded: Mar 27, 2018
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Packaging
| LT8640EUDC-1#PBF | LT8640EUDC-1#TRPBF | LT8640HUDC-1#PBF | LT8640HUDC-1#TRPBF | LT8640IUDC-1#PBF | LT8640IUDC-1#TRPBF | |
|---|---|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 | 5 | 6 |
| 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 | 3x4 QFN-18 Package Outline Drawing | 3x4 QFN-18 Package Outline Drawing |
| Package Code | UDC | UDC | UDC | UDC | UDC | UDC |
| Package Index | 05-08-1956 | 05-08-1956 | 05-08-1956 | 05-08-1956 | 05-08-1956 | 05-08-1956 |
| Pin Count | 18 | 18 | 18 | 18 | 18 | 18 |
Parametrics
| Parameters / Models | LT8640EUDC-1#PBF | LT8640EUDC-1#TRPBF | LT8640HUDC-1#PBF | LT8640HUDC-1#TRPBF | LT8640IUDC-1#PBF | LT8640IUDC-1#TRPBF |
|---|---|---|---|---|---|---|
| Architecture | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode |
| Demo Boards | DC2202A | DC2202A | DC2202A | DC2202A | DC2202A | DC2202A |
| Design Tools | LTspice File,LTpowerCAD File | LTspice File,LTpowerCAD File | LTspice File,LTpowerCAD File | LTspice File,LTpowerCAD File | LTspice File,LTpowerCAD File | LTspice File,LTpowerCAD File |
| Export Control | no | no | no | no | no | no |
| Features | Low EMI, Silent Switcher Architecture, Resistor Set Frequency, External Synchronization, Burst Mode, Tracking, Power Good | Low EMI, Silent Switcher Architecture, Resistor Set Frequency, External Synchronization, Burst Mode, Tracking, Power Good | Low EMI, Silent Switcher Architecture, Resistor Set Frequency, External Synchronization, Burst Mode, Tracking, Power Good | Low EMI, Silent Switcher Architecture, Resistor Set Frequency, External Synchronization, Burst Mode, Tracking, Power Good | Low EMI, Silent Switcher Architecture, Resistor Set Frequency, External Synchronization, Burst Mode, Tracking, Power Good | Low EMI, Silent Switcher Architecture, Resistor Set Frequency, External Synchronization, Burst Mode, Tracking, Power Good |
| Frequency, kHz | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 |
| Frequency Adjust Range | 200kHz - 3MHz | 200kHz - 3MHz | 200kHz - 3MHz | 200kHz - 3MHz | 200kHz - 3MHz | 200kHz - 3MHz |
| Frequency Sync Range | 200kHz - 3MHz | 200kHz - 3MHz | 200kHz - 3MHz | 200kHz - 3MHz | 200kHz - 3MHz | 200kHz - 3MHz |
| Integrated Inductor | no | no | no | no | no | no |
| Ishutdown, µA | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 |
| Isupply, mA | 0.0017 | 0.0017 | 0.0017 | 0.0017 | 0.0017 | 0.0017 |
| Max Phases | 1 | 1 | 1 | 1 | 1 | 1 |
| Monolithic | yes | yes | yes | yes | yes | yes |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 |
| Operating Temperature Range, °C | 0 to 85 | 0 to 85 | -40 to 125 | -40 to 125 | -40 to 85 | -40 to 85 |
| Output Current, A | 5 | 5 | 5 | 5 | 5 | 5 |
| Polyphase | no | no | no | no | no | no |
| Switch Current, A | 10 | 10 | 10 | 10 | 10 | 10 |
| Synchronous | yes | yes | yes | yes | yes | yes |
| Topology | Buck | Buck | Buck | Buck | Buck | Buck |
| Vin Max, V | 42 | 42 | 42 | 42 | 42 | 42 |
| Vin Min, V | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 |
| Vout Max, V | 41.58 | 41.58 | 41.58 | 41.58 | 41.58 | 41.58 |
| Vout Maximum | 0.99Vin | 0.99Vin | 0.99Vin | 0.99Vin | 0.99Vin | 0.99Vin |
| Vout Min, V | 0.97 | 0.97 | 0.97 | 0.97 | 0.97 | 0.97 |
| Vref Accuracy Over Temp, % | 1.23 | 1.23 | 1.23 | 1.23 | 1.23 | 1.23 |
Eco Plan
| LT8640EUDC-1#PBF | LT8640EUDC-1#TRPBF | LT8640HUDC-1#PBF | LT8640HUDC-1#TRPBF | LT8640IUDC-1#PBF | LT8640IUDC-1#TRPBF | |
|---|---|---|---|---|---|---|
| RoHS | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Other Options
Model Line
Series: LT8640-1 (6)
Manufacturer's Classification
- Power Management > Switching Regulator > Ultralow Noise Regulators
- Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | High Input Voltage Buck
