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LT3782: 2-Phase Step-Up DC/DC Controller Data Sheet1/23/2009PDF227K
Alternative Parts
Overview
Features and Benefits
- 2-Phase Operation Reduces Required Input and Output Capacitance
- Programmable Switching Frequency: 150kHz to 500kHz
- 6V to 40V Input Range
- 10V Gate Drive with VCC ≥13V
- High Current Gate Drive (4A)
- Programmable Soft-Start and Current Limit
- Programmable Slope Compensation for High Noise Immunity
- MOSFET Gate Signals with Programmable Falling Edge Delay for External Synchronous Drivers
- Programmable Undervoltage Lockout
- Programmable Duty Cycle Clamp (50% or Higher)
- Thermally Enhanced 28-Lead TSSOP and 4mm x 5mm QFN Packages
Product Details
The LT3782 is a current mode two phase step-up DC/DC converter controller. Its high switching frequency (up to 500kHz) and 2-phase operation reduce system filtering capacitance and inductance requirements.
With 10V gate drive (VCC ≥13V) and 4A peak drive current, the LT3782 can drive most industrial grade high power MOSFETs with high efficiency. For synchronous applications, the LT3782 provides synchronous gate signals with programmable falling edge delay to avoid cross conduction when using external MOSFET drivers. Other features include programmable undervoltage lockout, soft-start, current limit, duty cycle clamp (50% or higher) and slope compensation.
The LT3782 is available in a thermally enhanced 28-lead TSSOP and 4mm x 5mm QFN packages.
For new designs use the LT3782A which has improved
phase matching
Applications
- Industrial Equipment
- Telecom Infrastructure
- Interleaved Isolated Power Supply
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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R303 Reliability Data3/23/2018PDF232 K
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DC1234B - Demo Manual9/24/2009PDF526K
Tools & Simulations
LTspice
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, 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.
LTspice Simulations
Models for the following parts are available in LTspice:
LT3782
LT3782A
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LT3782EFE#PBF | Material Declaration | Reliability Data | 28-Lead TSSOP w/ EP | |
| LT3782EFE#TRPBF | Material Declaration | Reliability Data | 28-Lead TSSOP w/ EP | |
| LT3782EUFD#PBF | Material Declaration | Reliability Data | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | |
| LT3782EUFD#TRPBF | Material Declaration | Reliability Data | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | |
| LT3782IFE#PBF | Material Declaration | Reliability Data | 28-Lead TSSOP w/ EP | |
| LT3782IFE#TRPBF | Material Declaration | Reliability Data | 28-Lead TSSOP w/ EP | |
| Wafer Fabrication Data | R303 Reliability Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.