LTC3407
RECOMMENDED FOR NEW DESIGNSDual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $4.37
Overview
- High Efficiency: Up to 96%
- Very Low Quiescent Current: Only 40µA
- 1.5MHz Constant Frequency Operation
- High Switch Current: 1A 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 Sychronizable Oscillator
- Small Thermally Enhanced MSOP Package and 3mm x 3mm DFN Packages
The LTC3407 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 1.5MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 1A 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 ripple noise for low power efficiency. Burst Mode® operation provides high efficiency at light loads, while pulse-skipping mode provides low ripple noise 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.
| Iout | Fsw | Features | |
| LTC3407 | 2x 600mA | 1.5MHz | - |
| LTC3407-2 | 2x 800mA | 2.25MHz | - |
| LTC3407-3 | 2x 800mA | 2.25MHz | Fixed 1.8V/3.3V |
| LTC3407-4 | 2x 800mA | 2.25MHz | Reduced POR Delay |
| LTC3407A | 2x 600mA | 1.5MHz | Low Ripple Burst Mode |
| LTC3407A-2 | 2x 800mA | 2.25MHz | Low Ripple Burst Mode |
Applications
- PDAs/Palmtop PCs
- Digital Cameras
- Cellular Phones
- Portable Media Players
- PC Cards
- Wireless and DSL Modems
Documentation
Data Sheet 1
User Guide 2
Design Note 3
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3407EDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC3407EDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC3407EMSE#PBF | 10-Lead MSOP w/ EP | ||
| LTC3407EMSE#TRPBF | 10-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC3407EMSE#PBF | PRODUCTION | |
| LTC3407EMSE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC3407A | LAST TIME BUY | Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3407
- LTC3407-2
- LTC3407-3
- LTC3407-4
- LTC3407A
- LTC3407A-2
LTpowerCAD 1
Design tools for the following parts are available in LTpowerCAD:
- LTC3407
- LTC3407-2
- LTC3407-3
- LTC3407-4
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Evaluation Kits
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