LTC3805IDD-5#TRPBF
ActiveADJUSTABLE FREQUENCY CURRENT MODE FLYBACK/BOOST/SEPIC DC/DC CONTROLLER
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LTC3805IDD-5#TRPBF
ActiveADJUSTABLE FREQUENCY CURRENT MODE FLYBACK/BOOST/SEPIC DC/DC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3805IDD-5#TRPBF |
|---|---|
| Clock Sync | True |
| Control Features | Soft Start, Enable |
| Duty Cycle (Max) [Max] | 80 % |
| Frequency - Switching [Max] | 700 kHz |
| Frequency - Switching [Min] | 70 kHz |
| Function | Step-Up/Step-Down, Step-Up |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Output Configuration | Isolation Capable, Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 10-WFDFN Exposed Pad |
| Supplier Device Package | 10-DFN (3x3) |
| Synchronous Rectifier | False |
| Topology | Boost, SEPIC, Flyback |
| Voltage - Supply (Vcc/Vdd) [Max] | 9.5 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 3.95 V |
LTC3805 Series
Adjustable Frequency Current Mode Flyback DC/DC Controller
| Part | Package / Case | Number of Outputs | Operating Temperature [Max] | Operating Temperature [Min] | Supplier Device Package | Output Phases | Frequency - Switching [Max] | Frequency - Switching [Min] | Duty Cycle (Max) [Max] | Synchronous Rectifier | Clock Sync | Output Configuration | Function | Topology | Mounting Type | Output Type | Control Features | Voltage - Supply (Vcc/Vdd) [Max] | Voltage - Supply (Vcc/Vdd) [Min] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | 1 | 150 °C | -55 °C | 10-MSOP-EP | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up/Step-Down | Flyback | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
 Analog Devices Inc./Maxim Integrated | 10-WFDFN Exposed Pad | 1 | 125 °C | -40 C | 10-DFN (3x3) | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up/Step-Down | Flyback | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
Analog Devices Inc./Maxim Integrated | 10-WFDFN Exposed Pad | 1 | 125 °C | -40 C | 10-DFN (3x3) | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up/Step-Down | Flyback | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
 Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | 1 | 125 °C | -40 C | 10-MSOP-EP | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up/Step-Down | Flyback | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | 1 | 85 C | -40 ¯C | 10-MSOP-EP | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up Step-Up/Step-Down | Boost Flyback SEPIC | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
Analog Devices Inc./Maxim Integrated | 10-WFDFN Exposed Pad | 1 | 125 °C | -40 C | 10-DFN (3x3) | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up Step-Up/Step-Down | Boost Flyback SEPIC | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
Analog Devices Inc./Maxim Integrated | 10-WFDFN Exposed Pad | 1 | 85 C | -40 ¯C | 10-DFN (3x3) | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up/Step-Down | Flyback | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
 Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | 1 | 85 C | -40 ¯C | 10-MSOP-EP | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up/Step-Down | Flyback | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
 Analog Devices Inc./Maxim Integrated | 10-WFDFN Exposed Pad | 1 | 85 C | -40 ¯C | 10-DFN (3x3) | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up Step-Up/Step-Down | Boost Flyback SEPIC | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V | ||
Analog Devices Inc./Maxim Integrated | 10-MSOP 10-TFSOP Exposed Pad | 1 | 85 C | -40 ¯C | 10-MSOP-EP | 1 | 700 kHz | 70 kHz | 80 % | Isolation Capable Positive | Step-Up/Step-Down | Flyback | Surface Mount | Transistor Driver | Enable Soft Start | 9.5 V | 3.95 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | Updated |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 6.11 | 1m+ |
| Digi-Reel® | 1 | $ 6.11 | 1m+ | |
| N/A | 0 | $ 2.25 | 1m+ | |
| Tape & Reel (TR) | 2500 | $ 2.28 | 1m+ | |
Description
General part information
LTC3805 Series
The LTC3805 is a current mode controller for flyback DC/DC converters designed to drive an N-channel MOSFET in high input and output voltage converter applications. Operating frequency and slope compensation can be programmed by external resistors. Programmable overcurrent sensing protects the converter from short-circuits. Soft-start can be programmed using an external capacitor and the soft-start capacitor also programs an automatic restart feature.The LTC3805 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 can be powered from a high VINthrough a resistor or it can be powered directly from a low impedance DC voltage of 9V or less.The LTC3805 is available in the 10-lead MSOP package and the 3mm × 3mm DFN package.Turn On VoltageLTC38058.4VLTC3805-54.5VApplicationsTelecom Power Supplies42V and 12V Automotive Power SuppliesIsolated Electronic Equipment
Documents
Technical documentation and resources