LTC3854EDDB#TRMPBF
ActiveDC/DC CONTROLLER, SYNCH BUCK, 4.5 V TO 38 V SUPPLY, 1 OUTPUT, 98% DUTY CYCLE, 400KHZ, DFN-EP-12
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LTC3854EDDB#TRMPBF
ActiveDC/DC CONTROLLER, SYNCH BUCK, 4.5 V TO 38 V SUPPLY, 1 OUTPUT, 98% DUTY CYCLE, 400KHZ, DFN-EP-12
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3854EDDB#TRMPBF |
|---|---|
| Clock Sync | False |
| Control Features | Soft Start, Enable |
| Duty Cycle (Max) [Max] | 98 % |
| Frequency - Switching | 400 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 | 12-WFDFN Exposed Pad |
| Supplier Device Package | 12-DFN (3x2) |
| 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 | $ 6.61 | |
| 10 | $ 4.48 | |||
| 25 | $ 3.93 | |||
| 100 | $ 3.31 | |||
| 250 | $ 3.01 | |||
| Digi-Reel® | 1 | $ 6.61 | ||
| 10 | $ 4.48 | |||
| 25 | $ 3.93 | |||
| 100 | $ 3.31 | |||
| 250 | $ 3.01 | |||
| Tape & Reel (TR) | 500 | $ 2.83 | ||
| 1000 | $ 2.68 | |||
| 1500 | $ 2.60 | |||
| 2500 | $ 2.51 | |||
| 3500 | $ 2.50 | |||
| Newark | Each (Supplied on Cut Tape) | 1 | $ 5.91 | |
| 10 | $ 3.93 | |||
| 25 | $ 3.73 | |||
| 50 | $ 3.52 | |||
| 100 | $ 3.32 | |||
| 250 | $ 3.02 | |||
| 500 | $ 2.82 | |||
Description
General part information
LTC3854 Series
The LTC3854 is a high performance synchronous stepdown switching DC/DC controller that drives an all N-channel synchronous power MOSFET stage.The LTC3854 features a 400kHz constant frequency current mode architecture. The LTC3854 operates from a 4.5V to 38V (40V absolute maximum) input voltage range and regulates the output voltage from 0.8V to 5.5V.The RUN/SS pin provides both soft-start and enable features. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. Current foldback limits MOSFET dissipation during short circuit conditions. Current foldback functions are disabled during soft-start.The LTC3854 has a minimum on-time at 75ns, making it well suited for high step-down ratios. The strong onboard MOSFET drivers allow the use of high power external MOSFETs to produce output currents up to 20A.ApplicationsAutomotive SystemsTelecom SystemsIndustrial EquipmentDistributed DC Power Systems
Documents
Technical documentation and resources