Power Management
Switching Regulator
Step-Down (Buck) Regulators
Micropower Buck
Power Management
Switching Regulator
Step-Down (Buck) Regulators
Internal Power Switch Buck
LTC3411 - 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter
Features
- Small 10-Lead MSOP or DFN Package
- Uses Tiny Capacitors and Inductor
- High Frequency Operation: Up to 4MHz
- High Switch Current: 1.6A
- Low RDS(ON) Internal Switches: 0.110Ω
- High Efficiency: Up to 95%
- Stable with Ceramic Capacitors
- Current Mode Operation for Excellent Line and Load Transient Response
- Short-Circuit Protected
- Low Dropout Operation: 100% Duty Cycle
- Low Shutdown Current: IQ ≤ 1μA
- Low Quiescent Current: 60µA
- Output Voltages from 0.8V to 5V
- Selectable Burst Mode® Operation
- Sychronizable to External Clock
Typical Application
Description
The LTC3411 is a constant frequency, synchronous, step- down DC/DC converter. Intended for medium power applications, it operates from a 2.63V to 5.5V input voltage range and has a user configurable operating frequency up to 4MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. The output voltage is adjustable from 0.8V to 5V. Internal sychronous 0.11Ω power switches with 1.6A peak current ratings provide high efficiency. The LTC3411’s current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors.The LTC3411 can be configured for automatic power saving Burst Mode operation to reduce gate charge losses when the load current drops below the level required for continuous operation. For reduced noise and RF interference, the SYNC/MODE pin can be configured to skip pulses or provide forced continuous operation.
To further maximize battery life, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle) with a low quiescent current of 60μA. In shutdown, the device draws <1μA.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
DFN-10, MS-10
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LTC3411AEDD#PBF | DFN | 10 | E | $2.86 | $2.00 | View |
| LTC3411AEDD#TRPBF | DFN | 10 | E | $2.06 | View | |
| LTC3411AEMS#PBF | MSOP | 10 | E | $2.86 | $2.00 | View |
| LTC3411AEMS#TRPBF | MSOP | 10 | E | $2.06 | View | |
| LTC3411AIDD#PBF | DFN | 10 | I | $3.29 | $2.30 | View |
| LTC3411AIDD#TRPBF | DFN | 10 | I | $2.36 | View | |
| LTC3411AIMS#PBF | MSOP | 10 | I | $3.29 | $2.30 | View |
| LTC3411AIMS#TRPBF | MSOP | 10 | I | $2.36 | View | |
| LTC3411EDD | DFN | 10 | E | $3.78 | $3.20 | View |
| LTC3411EDD#PBF | DFN | 10 | E | $3.78 | $3.20 | View |
| LTC3411EDD#TR | DFN | 10 | E | $3.26 | View | |
| LTC3411EDD#TRPBF | DFN | 10 | E | $3.26 | View | |
| LTC3411EMS | MSOP | 10 | E | $3.78 | $3.20 | View |
| LTC3411EMS#PBF | MSOP | 10 | E | $3.78 | $3.20 | View |
| LTC3411EMS#TR | MSOP | 10 | E | $3.26 | View | |
| LTC3411EMS#TRPBF | MSOP | 10 | E | $3.26 | View | |
| LTC3411IDD#PBF | DFN | 10 | I | $5.36 | $3.75 | View |
| LTC3411IDD#TRPBF | DFN | 10 | I | $3.81 | View | |
| LTC3411IMS#PBF | MSOP | 10 | I | $5.36 | $3.75 | View |
| LTC3411IMS#TRPBF | MSOP | 10 | I | $3.81 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1176A | LTC3411AEDD DEMO BOARD | 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter | $100.00 | |
| DC441A | LTC3411EMS | High Efficiency Monolithic Synchronous 1MHz Step-Down Regulator, 2.65V to 5.5V Input, 1.8V/2.5V/3.3Vout @ 1.25A | $100.00 | |
| Buy Now | |||
Applications
- Notebook Computers
- Digital Cameras
- Cellular Phones
- Handheld Instruments
- Board Mounted Power Supplies
Simulate
LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.
To launch a ready to run LTspice demonstration circuit for this part:
- Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
- Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu
To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.
Related models available in LTspice IV
LTC3411
LTC3411A
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
