LT8708-1
80V Synchronous 4-Switch Buck-Boost DC/DC Slave Controller for LT8708 Multiphase System
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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)
Documentation & Resources
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80V to 150V Non-Isolated DC/DC2/6/2018PDF661K
Tools & Simulations
LTspice
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Models for the following parts are available in LTspice:
LT8708
LT8708-1
Design Resources
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PCN-PDN Information
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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.