LTC3417A-2 - Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator
Features
- High Efficiency: Up to 95%
- 1.5A/1A Guaranteed Minimum Output Current
- Synchronizable to External Clock
- No Schottky Diodes Required
- Programmable Frequency Operation: 1.5MHz or Adjustable From 0.6MHz to 4MHz
- Low Ripple (<35mVP-P) BurstMode Operation
IQ: 125μA in Sleep - Low RDS(ON) Internal Switches
- Short-Circuit Protected
- VIN: 2.25V to 5.5V
- Current Mode Operation for Excellent Line and Load Transient Response
- Ultralow Shutdown Current: IQ < 1μA
- Low Dropout Operation: 100% Duty Cycle
- Power Good Ouput
- Phase Pin Selects 2nd Channel Phase Relationship with Respect to 1st Channel
- Internal Soft-Start with Individual Run Pin Control
- Available in Small Thermally Enhanced
(5mm × 3mm) DFN and 20-Lead TSSOP Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC3417A-2 is a dual constant frequency, synchronous step-down DC/DC converter. Intended for medium power applications, it operates from a 2.25V to 5.5V input voltage range and has a constant programmable switching frequency, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Each output voltage is adjustable from 0.8V to 5V. Internal synchronous, low RDS(ON) power switches provide high efficiency without the need for external Schottky diodes.
A user selectable mode input allows the user to trade off ripple voltage for light load efficiency. Burst Mode operation provides high efficiency at light loads, while Pulse Skip mode provides low ripple noise at light loads. A phase mode pin allows the second channel to operate in-phase or 180° out-of-phase with respect to channel 1. Out-of-phase operation produces lower RMS current on VIN and thus lower stress on the input capacitor.
To further maximize battery life, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle) and both channels draw a total quiescent current of only 100μA. In shutdown, the device draws <1μA.
| Features | Notes | |
| LTC3417 | - | - |
| LTC3417A | Improved Channel Matching | - |
| LTC3417A-1 | Power On Reset | Recommended For New Designs |
| LTC3417A-2 | Power Good | Recommended For New Designs |
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC3417AEDHC-2#PBF | 5x3 DFN-16 | DHC | E | 05-08-1706 | Yes |
| LTC3417AEDHC-2#TRPBF | 5x3 DFN-16 | DHC | E | 05-08-1706 | Yes |
| LTC3417AEFE-2#PBF | TSSOP-20 | FE | E | 05-08-1663 (CA) | Yes |
| LTC3417AEFE-2#TRPBF | TSSOP-20 | FE | E | 05-08-1663 (CA) | Yes |
| LTC3417AIDHC-2#PBF | 5x3 DFN-16 | DHC | I | 05-08-1706 | Yes |
| LTC3417AIDHC-2#TRPBF | 5x3 DFN-16 | DHC | I | 05-08-1706 | Yes |
| LTC3417AIFE-2#PBF | TSSOP-20 | FE | I | 05-08-1663 (CA) | Yes |
| LTC3417AIFE-2#TRPBF | TSSOP-20 | FE | I | 05-08-1663 (CA) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- 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 | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3417AEDHC-2#PBF | 5x3 DFN-16 | E | $4.19 | $2.93 | Yes | |
| LTC3417AEDHC-2#TRPBF | 5x3 DFN-16 | E | $2.99 | Yes | ||
| LTC3417AEFE-2#PBF | TSSOP-20 | E | $4.47 | $3.13 | Yes | |
| LTC3417AEFE-2#TRPBF | TSSOP-20 | E | $3.19 | Yes | ||
| LTC3417AIDHC-2#PBF | 5x3 DFN-16 | I | $4.82 | $3.37 | Yes | |
| LTC3417AIDHC-2#TRPBF | 5x3 DFN-16 | I | $3.43 | Yes | ||
| LTC3417AIFE-2#PBF | TSSOP-20 | I | $5.10 | $3.57 | Yes | |
| LTC3417AIFE-2#TRPBF | TSSOP-20 | I | $3.63 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about 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 |
|---|---|---|---|
| DC1336A | LTC3417AEDHC-2 Demo Board | Dual Synchronous 1.5/1A 1A 4MHz Step-Down DC/DC Regulator | $150.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3417AIDHC-2#PBF | 5x3 DFN-16 | I | $4.82 | $3.37 | Yes | |
| LTC3417AIDHC-2#TRPBF | 5x3 DFN-16 | I | $3.43 | Yes | ||
| LTC3417AIFE-2#PBF | TSSOP-20 | I | $5.10 | $3.57 | Yes | |
| LTC3417AIFE-2#TRPBF | TSSOP-20 | I | $3.63 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- GPS/Navigation Systems
- Automotive Instrumentation
- PC Cards
- Industrial Power Supplies
- General Purpose Point of Load DC/DC
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC3417
LTC3417A
LTC3417A-1
LTC3417A-2
LTpowerCAD
The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD
To open the project file for this circuit:
- Step 1: If you have not installed LTpowerCAD on this computer, download and install LTpowerCAD
- Step 2: Once LTpowerCAD is installed, click on the link(s) below to open the project file
- Step 3: If LTpowerCAD does not automatically open after clicking the link above, you can open the project file by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTpowerCAD and open the project file by selecting 'Open Project' from the 'File' menu
Design tools for the following parts are available in LTpowerCAD:
LTC3417
LTC3417A
LTC3417A-2
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.
