Overview
Features and Benefits
- Flexible Power Supply System Providing Four Outputs with a Wide Input Range
- Two High Voltage Synchronous Buck Regulators:
- 3V to 42V Input Voltage Range
- Output Currents Up to 2.5A and 1.5A
- High Efficiency Up to 93%
- Two Low Voltage Synchronous Buck Regulators:
- 2.6V to 5.5V Input Voltage Range
- Output Currents Up to 1.8A and 94% Efficiency
- Programmable Power-On Reset
- Power Good Indicators
- Resistor Programmable and Synchronizable 250kHz to 2.2MHz Switching Frequency
- Low Ripple Burst Mode® Operation:
- 30μA IQ at 12VIN
- Output Ripple < 15mV
- 2-Phase Clock Reduces Input Current Ripple
- Available in Thermally Enhanced 40-Lead QFN (6mm × 6mm) Package
- AEC-Q100 Qualified for Automotive Applications
Product Details
The LT8602 is a quad channel, current mode, monolithic buck switching regulator with a programmable power-on reset. All regulators are synchronized to a single oscillator with an adjustable frequency from 250kHz to 2.2MHz. The LT8602 can be configured for micropower Burst Mode operation or pulse-skipping operation at light load. Micropower operation results in quiescent current of 30μA with all four regulators operating in the application below.
The high voltage channels are synchronous buck regulators that operate from an input of 3V to 42V. The output currents are up to 1.5A (OUT1) and 2.5A (OUT2). The low voltage channels operate from an input of 2.6V to 5.5V. Internal synchronous power switches provide high efficiency with output currents up to 1.8A. The LT8602 uses a 2-phase clock with channels 1 and 3 operating 180° from channels 2 and 4 to reduce input ripple current on both HV and LV inputs. All channels have cycle-by-cycle current limit, providing protection against shorted outputs. Thermal shutdown provides additional protection
The LT8602 is available in either a 40-lead 6mm × 6mm QFN or a 48-Lead 7mm × 7mm LQFP package.
APPLICATIONS
- Automotive Systems
- Distributed Supply Regulation
- Industrial Controls and Power Supplies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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R570 Reliability Data3/23/2018
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DC1949A - Demo Manual7/15/2015
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42V, 2MHz, Quad Sync Buck7/27/2015
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Comprehensive Power Supply System Designs for Harsh Automotive Environments Consume Minimal Space, Preserve Battery Charge, Feature Low EMI8/16/2019 Analog Dialogue
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A Tipping Point for ADAS Is on the Short-Term Horizon7/11/2016
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95% Efficient at 2MHz 42V Synchronous Buck6/24/2016
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Automotive Electronic Systems Drive the Demand for Multi-Channel Synchronous Buck Converters3/30/2016
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42V Quad Monolithic Synchronous Step-Down Regulator with 30μA Quiescent Current9/21/2015
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.
Models for the following parts are available in LTspice:
LT8602
LTpowerCAD
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.
To open the project file for this circuit:
Step 1: Download and install LTpowerCAD on your computer.
Step 2: Click on the link(s) in the section below to download part-specific project files.
Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.
Design tools for the following parts are available in LTpowerCAD:
LT8602HV
LT8602LV
Product Recommendations
LT8602 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.
PCN-PDN Information
Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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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.