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 × 5mm QFN Packages
The LT3782A is a current mode 2-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 LT3782A can drive most industrial grade high power MOSFETs with high efficiency. For synchronous applications, the LT3782A 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 LT3782A is identical to the LT3782 except that the LT3782A has a tighter current sense mismatch tolerance.
The LT3782A is available in thermally enhanced 28-lead TSSOP and 4mm × 5mm QFN packages.
- Industrial Equipment
- Telecom Infrastructure
- Interleaved Isolated Power Supply
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)
Demonstration circuit DC770C is a 2-phase DC/DC boost converter featuring the LT3782A constant frequency current mode boost controller. The DC770C operates over 10V to 28V input and provides 4A of output current at 50V output. The 250kHz constant frequency operation results in a small and efficient circuit.
Documentation & Resources
Tools & Simulations
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.
Models for the following parts are available in LTspice:
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|
|LT3782AEFE#PBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3782AEFE#TRPBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3782AEUFD#PBF||Material Declaration||Reliability Data||28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)|
|LT3782AEUFD#TRPBF||Material Declaration||Reliability Data||28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)|
|LT3782AIFE#PBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3782AIFE#TRPBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3782AIUFD#PBF||Material Declaration||Reliability Data||28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)|
|LT3782AIUFD#TRPBF||Material Declaration||Reliability Data||28-Lead QFN (4mm x 5mm x 0.75mm 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.