Features and Benefits
- Two Independent Controllers in One Package
- Two Sides Run Out-of-Phase to Minimize CIN
- All N-Channel External MOSFET Architecture
- No External Current Sense Resistors
- Excellent Output Regulation: 1% Total Output Accuracy
- 550kHz Switching Frequency Minimizes External Component Size
- 1A to 25A Output Current per Channel
- High Efficiency over Wide Load Current Range
- Quiescent Current Drops Below 100µA in Shutdown
- Small 24-Pin Narrow SSOP Package
The LTC1702 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 MOSFET devices in a voltage mode feedback, synchronous buck configuration. The LTC1702 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 LTC1702 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 LTC1702 shuts down and supply current drops below 100µA.
- Microprocessor 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.
Documentation & Resources
R384 Reliability Data3/26/2018
Design Note 279: Microprocessor Core Supply Voltage Set by I2C Bus without VID Lines8/21/2021
DN311 - Dual Output Supply Powers FPGAs from 3.3V and 5V Inputs3/21/2014
DN218 - High Current Dual DC/DC Converter Operates from 3.3V Input3/21/2014
Design Solutions 9 - 2-Phase DC/DC Controller Reduces Capacitanceand Increases Battery Life in Portable Applications8/21/2007
Design Solutions 8 - 2-Step Power Conversion: Portable Power for the Future8/21/2007
30V, Dual Output Regulator Controller is Efficient, Rich in Features, and Saves Space11/1/2004 LT Journal
SMBus Controls CPU Voltage Regulators without VID Pins9/1/2001 LT Journal
Active Voltage Positioning Saves Output Capacitors in Portable Computer Applications2/1/2000 LT Journal
LTC1702/LTC1703 Switching Regulator Controllers Set a New Standard for Transient Response9/1/1999 LT Journal
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.
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.