LTC3775EUD#TRPBF
ActiveHIGH FREQUENCY SYNCHRONOUS STEP-DOWN VOLTAGE MODE DC/DC CONTROLLER
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LTC3775EUD#TRPBF
ActiveHIGH FREQUENCY SYNCHRONOUS STEP-DOWN VOLTAGE MODE DC/DC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3775EUD#TRPBF |
|---|---|
| Clock Sync | True |
| Control Features | Enable, Soft Start, Frequency Control, Current Limit |
| Duty Cycle (Max) [Max] | 90 % |
| Frequency - Switching [Max] | 1 MHz |
| Frequency - Switching [Min] | 250 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 16-WFQFN Exposed Pad |
| Supplier Device Package | 16-QFN (3x3) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 38 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.5 V |
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 | $ 7.06 | |
| Digi-Reel® | 1 | $ 7.06 | ||
| Tape & Reel (TR) | 2500 | $ 2.73 | ||
Description
General part information
LTC3775 Series
The LTC3775 is a high efficiency synchronous step-down switching DC/DC controller that drives an all N-channel power MOSFET stage from a 4.5V to 38V input supply voltage. A patented line feedforward compensation circuit and a high bandwidth error amplifier provide very fast line and load transient response.High step-down ratios are made possible by a low 30ns minimum on-time, allowing extremely low duty cycles. MOSFET RDS(ON)current sensing maximizes efficiency. Alternatively, a sense resistor can be used for higher current limit accuracy. Continuous monitoring of the voltages across the top and bottom MOSFETs allows cycle-by-cycle control of the inductor current, configurable by external resistors.The soft-start function controls the duty cycle during start-up, providing a smooth output voltage ramp up. The operating frequency is user programmable from 250kHz to 1MHz and can be synchronized to an external clock.ApplicationsAutomotive SystemsTelecom and Industrial Power SuppliesPoint of Load Applications
Documents
Technical documentation and resources