Datasheet Linear Technology LTC3858 — Ficha de datos
| Fabricante | Linear Technology |
| Serie | LTC3858 |
Controlador reductor síncrono dual de 2 fases I Q bajo
Hojas de datos
Datasheet LTC3858
PDF, 434 Kb, Idioma: en, Archivo subido: sept 23, 2017, Páginas: 38
Low IQ, Dual 2-Phase Synchronous Step-Down Controller
Low IQ, Dual 2-Phase Synchronous Step-Down Controller
Extracto del documento
Precios
Embalaje
| LTC3858EUH#PBF | LTC3858EUH#TRPBF | LTC3858IUH#PBF | LTC3858IUH#TRPBF | |
|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 |
| Package | 5x5 QFN-32 Dibujo del esquema del paquete | 5x5 QFN-32 Dibujo del esquema del paquete | 5x5 QFN-32 Dibujo del esquema del paquete | 5x5 QFN-32 Dibujo del esquema del paquete |
| Package Code | UH | UH | UH | UH |
| Package Index | 05-08-1693 | 05-08-1693 | 05-08-1693 | 05-08-1693 |
| Pin Count | 32 | 32 | 32 | 32 |
Paramétricos
| Parameters / Models | LTC3858EUH#PBF | LTC3858EUH#TRPBF | LTC3858IUH#PBF | LTC3858IUH#TRPBF |
|---|---|---|---|---|
| Architecture | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode |
| Demo Boards | DC1381A-B,DC1510A-A,DC1510A-B | DC1381A-B,DC1510A-A,DC1510A-B | DC1381A-B,DC1510A-A,DC1510A-B | DC1381A-B,DC1510A-A,DC1510A-B |
| Design Tools | LTspice Model,LTpowerCAD File | LTspice Model,LTpowerCAD File | LTspice Model,LTpowerCAD File | LTspice Model,LTpowerCAD File |
| Export Control | no | no | no | no |
| Features | DCR Current Sense, Resistor Set Frequency, External Synchronization, Burst Mode, Power Good, PolyPhase | DCR Current Sense, Resistor Set Frequency, External Synchronization, Burst Mode, Power Good, PolyPhase | DCR Current Sense, Resistor Set Frequency, External Synchronization, Burst Mode, Power Good, PolyPhase | DCR Current Sense, Resistor Set Frequency, External Synchronization, Burst Mode, Power Good, PolyPhase |
| Frequency, kHz | 900 | 900 | 900 | 900 |
| Frequency Adjust Range | 50kHz - 900kHz | 50kHz - 900kHz | 50kHz - 900kHz | 50kHz - 900kHz |
| Frequency Sync Range | 75kHz - 850kHz | 75kHz - 850kHz | 75kHz - 850kHz | 75kHz - 850kHz |
| Integrated Inductor | no | no | no | no |
| Ishutdown, µA | 8 | 8 | 8 | 8 |
| Isupply, mA | 0.17 | 0.17 | 0.17 | 0.17 |
| Max Phases | 2 | 2 | 2 | 2 |
| Monolithic | no | no | no | no |
| Number of Outputs | 2 | 2 | 2 | 2 |
| Operating Temperature Range, °C | 0 to 85 | 0 to 85 | -40 to 85 | -40 to 85 |
| Output Current, A | 25 | 25 | 25 | 25 |
| Output Current 2, A | 25 | 25 | 25 | 25 |
| Polyphase | yes | yes | yes | yes |
| Sense Resistor | Rsense, DCR | Rsense, DCR | Rsense, DCR | Rsense, DCR |
| Switch Current, A | 25 | 25 | 25 | 25 |
| Switch Current 2, A | 25 | 25 | 25 | 25 |
| Synchronous | yes | yes | yes | yes |
| Topology | Buck | Buck | Buck | Buck |
| Topology 1 | Buck | Buck | Buck | Buck |
| Topology 2 | Buck | Buck | Buck | Buck |
| Vin Max, V | 38 | 38 | 38 | 38 |
| Vin Min, V | 4 | 4 | 4 | 4 |
| Vout Max, V | 24 | 24 | 24 | 24 |
| Vout Maximum | 24V | 24V | 24V | 24V |
| Vout Min, V | 0.8 | 0.8 | 0.8 | 0.8 |
| Vout Min 2, V | .8 | .8 | .8 | .8 |
| Vref Accuracy Over Temp, % | 1 | 1 | 1 | 1 |
Plan ecológico
| LTC3858EUH#PBF | LTC3858EUH#TRPBF | LTC3858IUH#PBF | LTC3858IUH#TRPBF | |
|---|---|---|---|---|
| RoHS | Obediente | Obediente | Obediente | Obediente |
Linea modelo
Serie: LTC3858 (4)
Clasificación del fabricante
- Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | External Power Switch Buck Controllers