LTC3805IMSE#TRPBF
ActiveADJUSTABLE FREQUENCY CURRENT MODE FLYBACK DC/DC CONTROLLER
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LTC3805IMSE#TRPBF
ActiveADJUSTABLE FREQUENCY CURRENT MODE FLYBACK DC/DC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3805IMSE#TRPBF |
|---|---|
| Clock Sync | True |
| Control Features | Soft Start, Enable |
| Duty Cycle (Max) | 80 % |
| Frequency - Switching [Max] | 700 kHz |
| Frequency - Switching [Min] | 70 kHz |
| Function | Step-Up/Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive, Isolation Capable |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 3 Lead, 0.118 in |
| Package / Case | Exposed Pad, 10-TFSOP, 10-MSOP |
| Supplier Device Package | 10-MSOP-EP |
| Synchronous Rectifier | False |
| Topology | Flyback |
| Voltage - Supply (Vcc/Vdd) [Max] | 9.5 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 3.95 V |
LTC3805-5 Series
Adjustable Frequency Current Mode Flyback/Boost/SEPIC DC/DC Controller
| Part | Output Phases | Function | Mounting Type | Duty Cycle (Max) | Topology | Package / Case | Package / Case | Clock Sync | Output Configuration | Number of Outputs | Control Features | Operating Temperature [Min] | Operating Temperature [Max] | Supplier Device Package | Voltage - Supply (Vcc/Vdd) [Max] | Voltage - Supply (Vcc/Vdd) [Min] | Frequency - Switching [Min] | Frequency - Switching [Max] | Synchronous Rectifier | Output Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | 1 | Step-Up/Step-Down | Surface Mount | 80 % | Flyback | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -55 °C | 150 °C | 10-MSOP-EP | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | ||
Analog Devices | 1 | Step-Up/Step-Down | Surface Mount | 80 % | Flyback | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 125 ¯C | 10-MSOP-EP | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | ||
Analog Devices | 1 | Step-Up Step-Up/Step-Down | Surface Mount | 80 % | Boost Flyback SEPIC | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 85 °C | 10-MSOP-EP | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | ||
Analog Devices | 1 | Step-Up Step-Up/Step-Down | Surface Mount | 80 % | Boost Flyback SEPIC | 10-WFDFN Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 125 ¯C | 10-DFN (3x3) | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | |||
Analog Devices | 1 | Step-Up/Step-Down | Surface Mount | 80 % | Flyback | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 85 °C | 10-MSOP-EP | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | ||
Analog Devices | 1 | Step-Up Step-Up/Step-Down | Surface Mount | 80 % | Boost Flyback SEPIC | 10-WFDFN Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 85 °C | 10-DFN (3x3) | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | |||
Analog Devices | 1 | Step-Up/Step-Down | Surface Mount | 80 % | Flyback | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 85 °C | 10-MSOP-EP | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | ||
Analog Devices | 1 | Step-Up/Step-Down | Surface Mount | 80 % | Flyback | 10-WFDFN Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 85 °C | 10-DFN (3x3) | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | |||
Analog Devices | 1 | Step-Up/Step-Down | Surface Mount | 80 % | Flyback | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 150 °C | 10-MSOP-EP | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver | ||
Analog Devices | 1 | Step-Up Step-Up/Step-Down | Surface Mount | 80 % | Boost Flyback SEPIC | 10-WFDFN Exposed Pad | Isolation Capable Positive | 1 | Enable Soft Start | -40 °C | 85 °C | 10-DFN (3x3) | 9.5 V | 3.95 V | 70 kHz | 700 kHz | Transistor Driver |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 6.11 | |
| 10 | $ 4.12 | |||
| 25 | $ 3.60 | |||
| 100 | $ 3.03 | |||
| 250 | $ 2.75 | |||
| 500 | $ 2.58 | |||
| 1000 | $ 2.43 | |||
| Digi-Reel® | 1 | $ 6.11 | ||
| 10 | $ 4.12 | |||
| 25 | $ 3.60 | |||
| 100 | $ 3.03 | |||
| 250 | $ 2.75 | |||
| 500 | $ 2.58 | |||
| 1000 | $ 2.43 | |||
| Tape & Reel (TR) | 2500 | $ 2.28 | ||
Description
General part information
LTC3805-5 Series
The LTC3805-5 is a current mode DC/DC controller designed to drive an N-channel MOSFET in flyback, boost and SEPIC converter applications. Operating frequency and slope compensation can be programmed by external resistors. Programmable overcurrent sensing protects the converter from overload and short-circuit conditions. Soft-start can be programmed using an external capacitor and the soft-start capacitor also programs an automatic restart feature.The LTC3805-5 provides ±1.5% output voltage accuracy and consumes only 360μA of quiescent current during normal operation and only 40μA during micropower startup. Using a 9.5V internal shunt regulator, the LTC3805-5 can be powered from a high VINthrough a resistor or it can be powered directly from a low impedance DC voltage from 4.7V to 8.8V.The LTC3805-5 is available in the 10-lead MSOP package and the 3mm × 3mm DFN package.Turn On VoltageLTC38058.4VLTC3805-54.5VApplicationsAutomotive Power SuppliesTelecom Power SuppliesIsolated Electronic EquipmentAuxiliary/Housekeeping Power SuppliesPower over Ethernet
Documents
Technical documentation and resources