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LT8708-1
80V Synchronous 4-Switch Buck-Boost DC/DC Slave Controller for LT8708 Multiphase System
Overview
Features and Benefits
- Slave Chip of LT8708 to Deliver Additional Power
- Good Current Matching to the Average Output Current of LT8708 Through Current Regulation
- Easily Paralleled with LT8708 Through Four Pins
- Synchronized Start-Up with LT8708
- Same Conduction Modes as LT8708
- Synchronous Rectification: Up to 98% Efficiency
- Frequency Range: 100kHz to 400kHz
- Available in 40-Lead (5mm × 8mm) QFN with High Voltage Pin Spacing and 64-Lead (10mm × 10mm) eLQFP
- AEC-Q100 in Progress
Product Details
The LT8708-1 is a high performance buck-boost switching regulator controller that is paralleled with the LT8708 to add power and phases to an LT8708 system. The LT8708-1 always operates as a slave to the master LT8708 and has the capability of delivering as much current or power as the master. One or more slaves can be connected to a single master, proportionally increasing power and current capability of the system.
The LT8708-1 has the same conduction modes as LT8708, allowing the LT8708-1 to conduct current and power in the same direction(s) as the master. The master controls the overall current and voltage limits for an LT8708 multiphase system, and the slaves comply with these limits.
LT8708-1s can be easily paralleled with the LT8708 by connecting four signals together. Two additional current limits (forward VIN current and reverse VIN current) are available on each slave that can be set independently.
Applications
- High Voltage Buck-Boost Converters
- Bidirectional Charging Systems
- Automotive 48V Systems
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)
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.
Models for the following parts are available in LTspice:
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.
Design tools for the following parts are available in LTpowerCAD:
Reference Materials
Product Selector Card (1)
Press Releases (1)
Technical Articles (1)
Design Resources
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PCN-PDN Information
Sample & Buy
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.