Power Management
Switching Regulator
Step-Down (Buck) Regulators
Multiple Output Buck
Power Management
Switching Regulator
Step-Down (Buck) Regulators
Micropower Buck
Power Management
Switching Regulator
Step-Down (Buck) Regulators
Internal Power Switch Buck
LTC3407-2 - Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator
Features
- High Efficiency: Up to 95%
- Very Low Quiescent Current: Only 40µA
- 2.25MHz Constant Frequency Operation
- High Switch Current: 1.2A on Each Channel
- No Schottky Diodes Required
- Low RDS(ON) Internal Switches: 0.35Ω
- Current Mode Operation for Excellent Line and Load Transient Response
- Short-Circuit Protected
- Low Dropout Operation: 100% Duty Cycle
- Ultralow Shutdown Current: IQ < 1µA
- Output Voltages from 5V down to 0.6V
- Power-On Reset Output
- Externally Synchronizable Oscillator
- Small Thermally Enhanced MSOP and 3mm × 3mm DFN Packages
Typical Application
Description
The LTC3407-2 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ≤1.2mm. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 1.2A power switches provide high efficiency without the need for external Schottky diodes.
A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode® operation provides high efficiency at light loads, while Pulse Skip Mode provides low noise ripple at light loads.
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 40µA. In shutdown, the device draws <1µA.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
MS-10, DFN-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 |
|---|---|---|---|---|---|---|
| LTC3407AEDD#PBF | DFN | 10 | E | $3.71 | $2.60 | View |
| LTC3407AEDD#TRPBF | DFN | 10 | E | $2.66 | View | |
| LTC3407AEDD-2 | DFN | 10 | E | $4.21 | $2.95 | View |
| LTC3407AEDD-2#PBF | DFN | 10 | E | $4.21 | $2.95 | View |
| LTC3407AEDD-2#TR | DFN | 10 | E | $3.01 | View | |
| LTC3407AEDD-2#TRPBF | DFN | 10 | E | $3.01 | View | |
| LTC3407AEMSE#PBF | MSOP | 10 | E | $3.71 | $2.60 | View |
| LTC3407AEMSE#TRPBF | MSOP | 10 | E | $2.66 | View | |
| LTC3407AEMSE-2 | MSOP | 10 | E | $4.21 | $2.95 | View |
| LTC3407AEMSE-2#PBF | MSOP | 10 | E | $4.21 | $2.95 | View |
| LTC3407AEMSE-2#TR | MSOP | 10 | E | $3.01 | View | |
| LTC3407AEMSE-2#TRPBF | MSOP | 10 | E | $3.01 | View | |
| LTC3407AIDD | DFN | 10 | I | $4.27 | $2.99 | View |
| LTC3407AIDD#PBF | DFN | 10 | I | $4.27 | $2.99 | View |
| LTC3407AIDD#TR | DFN | 10 | I | $3.05 | View | |
| LTC3407AIDD#TRPBF | DFN | 10 | I | $3.05 | View | |
| LTC3407AIDD-2 | DFN | 10 | I | $4.84 | $3.39 | View |
| LTC3407AIDD-2#PBF | DFN | 10 | I | $4.84 | $3.39 | View |
| LTC3407AIDD-2#TR | DFN | 10 | I | $3.45 | View | |
| LTC3407AIDD-2#TRPBF | DFN | 10 | I | $3.45 | View | |
| LTC3407AIMSE | MSOP | 10 | I | $4.27 | $2.99 | View |
| LTC3407AIMSE#PBF | MSOP | 10 | I | $4.27 | $2.99 | View |
| LTC3407AIMSE#TR | MSOP | 10 | I | $3.05 | View | |
| LTC3407AIMSE#TRPBF | MSOP | 10 | I | $3.05 | View | |
| LTC3407AIMSE-2 | MSOP | 10 | I | $4.84 | $3.39 | View |
| LTC3407AIMSE-2#PBF | MSOP | 10 | I | $4.84 | $3.39 | View |
| LTC3407AIMSE-2#TR | MSOP | 10 | I | $3.45 | View | |
| LTC3407AIMSE-2#TRPBF | MSOP | 10 | I | $3.45 | View | |
| LTC3407EDD | DFN | 10 | E | $3.71 | $2.60 | View |
| LTC3407EDD#PBF | DFN | 10 | E | $3.71 | $2.60 | View |
| LTC3407EDD#TR | DFN | 10 | E | $2.66 | View | |
| LTC3407EDD#TRPBF | DFN | 10 | E | $2.66 | View | |
| LTC3407EDD-2 | DFN | 10 | E | $4.21 | $2.95 | View |
| LTC3407EDD-2#PBF | DFN | 10 | E | $4.21 | $2.95 | View |
| LTC3407EDD-2#TR | DFN | 10 | E | $3.01 | View | |
| LTC3407EDD-2#TRPBF | DFN | 10 | E | $3.01 | View | |
| LTC3407EDD-3 | DFN | 10 | E | $4.21 | $2.95 | View |
| LTC3407EDD-3#PBF | DFN | 10 | E | $4.21 | $2.95 | View |
| LTC3407EDD-3#TR | DFN | 10 | E | $3.01 | View | |
| LTC3407EDD-3#TRPBF | DFN | 10 | E | $3.01 | View | |
| LTC3407EDD-4 | DFN | 10 | E | $4.21 | $2.95 | View |
| LTC3407EDD-4#PBF | DFN | 10 | E | $4.21 | $2.95 | View |
| LTC3407EDD-4#TR | DFN | 10 | E | $3.01 | View | |
| LTC3407EDD-4#TRPBF | DFN | 10 | E | $3.01 | View | |
| LTC3407EMSE | MSOP | 10 | E | $3.71 | $2.60 | View |
| LTC3407EMSE#PBF | MSOP | 10 | E | $3.71 | $2.60 | View |
| LTC3407EMSE#TR | MSOP | 10 | E | $2.66 | View | |
| LTC3407EMSE#TRPBF | MSOP | 10 | E | $2.66 | View | |
| LTC3407EMSE-2 | MSOP | 10 | E | $4.21 | $2.95 | View |
| LTC3407EMSE-2#PBF | MSOP | 10 | E | $4.21 | $2.95 | View |
| LTC3407EMSE-2#TR | MSOP | 10 | E | $3.01 | View | |
| LTC3407EMSE-2#TRPBF | MSOP | 10 | E | $3.01 | View | |
| LTC3407EMSE-4 | MSOP | 10 | E | $4.21 | $2.95 | View |
| LTC3407EMSE-4#PBF | MSOP | 10 | E | $4.21 | $2.95 | View |
| LTC3407EMSE-4#TR | MSOP | 10 | E | $3.01 | View | |
| LTC3407EMSE-4#TRPBF | MSOP | 10 | E | $3.01 | View | |
| LTC3407IDD-2#PBF | DFN | 10 | I | $4.84 | $3.39 | View |
| LTC3407IDD-2#TRPBF | DFN | 10 | I | $3.45 | View | |
| LTC3407IMSE-2#PBF | MSOP | 10 | I | $4.84 | $3.39 | View |
| LTC3407IMSE-2#TRPBF | MSOP | 10 | I | $3.45 | 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 |
|---|---|---|---|
| DC734A | LTC3407-2EDD | Dual Synchronous Step-Down DC/DC Converter, Vin = 2.5V - 5.5V, Vout1 = 1.2V / 1.5V / 1.8V @ 800mA, Vout2 = 2.5V @ 800mA | $100.00 | |
| Buy Now | |||
Applications
- PDAs/Palmtop PCs
- Digital Cameras
- Cellular Phones
- Portable Media Players
- PC Cards
- Wireless and DSL Modems
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
LTC3407-2
LTC3407-3
LTC3407-4
LTC3407
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.
