Overview
Features and Benefits
- Pin Compatible with the LTC1702 with Improved Current Limit Control
- Two Sides Run Out-of-Phase to Minimize CIN
- No External Current Sense Resistors
- Excellent Output Regulation: 1% Total Output Accuracy
- Two Independent Controllers in One Package
- All N-Channel External MOSFET Architecture
- 550kHz Switching Frequency Minimizes External Component Size
- 1A to 25A Output Current per Channel
- High Efficiency over Wide Load Current Range
- Less Than 100µA Shutdown Current
- Small 24-Pin Narrow SSOP Package
Product Details
The LTC1702A is a dual switching regulator controller optimized for high efficiency with low input voltages. It includes two complete, on-chip,independent switching regulator controllers each designed to drive a pair of external N-channel MOSFETs in a voltage mode feedback,synchronous buck configuration. The LTC1702A uses a constant-frequency, true PWM design switching at 550kHz, minimizing external component size and cost and maximizing load transient performance. The synchronous buck architecture automatically shifts to discontinuous and then to Burst Mode® operation as the output load decreases, ensuring maximum efficiency over a wide range of load currents.
The LTC1702A features an onboard reference trimmed to 0.5% and can provide better than 1% regulation at the converter outputs. Open-drain logic outputs indicate whether either output has risen to within 5% of the final output voltage and an optional latching FAULT mode protects the load if the output rises 15% above the intended voltage. Each channel can be enabled independently; with both channels disabled, the LTC1702A shuts down and supply current drops below 100µA.
Applications
- Microprocessor, DSP Core and I/O Supplies
- Multiple Logic Supply Generator
- Distributed Power Applications
- High Efficiency Power Conversion
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 (2)
Documentation & Resources
-
R384 Reliability Data3/26/2018
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DC473A - Demo Manual9/24/2009
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DC275A - Demo Manual9/24/2009
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:
LTC1702
LTC1702A
Product Recommendations
LTC1702A Companion Parts
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 |
|---|---|---|---|---|
| LTC1702ACGN#PBF | Material Declaration | Reliability Data | 24-Lead SSOP (Narrow 0.15 Inch) | |
| LTC1702ACGN#TRPBF | Material Declaration | Reliability Data | 24-Lead SSOP (Narrow 0.15 Inch) | |
| LTC1702AIGN#PBF | Material Declaration | Reliability Data | 24-Lead SSOP (Narrow 0.15 Inch) | |
| LTC1702AIGN#TRPBF | Material Declaration | Reliability Data | 24-Lead SSOP (Narrow 0.15 Inch) | |
| Wafer Fabrication Data | R384 Reliability Data |
PCN-PDN Information
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Support & Discussions
Sample & Buy
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Lead Times
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.