LTC3549EDCB#TRPBF
ActiveCONV DC-DC 1.6V TO 5.5V SYNCHRONOUS STEP DOWN SINGLE-OUT 0.611V TO 5.5V 0.25A 6-PIN DFN EP T/R
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LTC3549EDCB#TRPBF
ActiveCONV DC-DC 1.6V TO 5.5V SYNCHRONOUS STEP DOWN SINGLE-OUT 0.611V TO 5.5V 0.25A 6-PIN DFN EP T/R
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3549EDCB#TRPBF |
|---|---|
| Current - Output | 250 mA |
| Frequency - Switching | 2.25 MHz |
| 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 Type | Adjustable |
| Package / Case | 6-WFDFN Exposed Pad |
| Supplier Device Package | 6-DFN (2x3) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 5.5 V |
| Voltage - Input (Min) [Min] | 1.6 V |
| Voltage - Output (Max) [Max] | 5.5 V |
| Voltage - Output (Min/Fixed) | 0.611 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 | N/A | 7470 | $ 5.81 | 1m+ |
Description
General part information
LTC3549 Series
The LTC3549 is a high efficiency, monolithic synchronous buck regulator using a constant-frequency, current mode architecture. The output voltage is adjusted via an external resistor divider.A fixed switching frequency of 2.25MHz is supported. This switching frequency allows the use of small surface mount inductors and capacitors, including ceramics.Supply current during Burst Mode operation is only 50µA dropping to < 1µA in shutdown. The 1.6V to 5.5V input voltage range makes the LTC3549 ideally suited for single cell Li-Ion, Li-Metal and 2-cell alkaline, NiCd or NiMH battery-powered applications. 100% duty cycle capability provides low dropout operation, extending battery life in portable systems. Burst Mode operation can be user-enabled, increasing efficiency at light loads, further extending battery life.The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Internal soft-start offers controlled output voltage rise time at startup without the need for external components.Applications2 AA-Cell ApplicationsCellular PhonesDigital CamerasMP3 Players
Documents
Technical documentation and resources
