LT8708-1 Series

80V Synchronous 4-Switch Buck-Boost DC/DC Slave Controller for LT8708 Multiphase System

Catalog

80V Synchronous 4-Switch Buck-Boost DC/DC Slave Controller for LT8708 Multiphase System

Part	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Configuration	Frequency - Switching [Max]	Frequency - Switching [Min]	Topology	Package / Case	Output Phases	Mounting Type	Output Type	Function	Supplier Device Package	Duty Cycle (Max)	Control Features
Analog Devices LT8708EUHG-1#TRPBF	1	125 °C	-40 °C	80 V	2.8 V	Positive	400 kHz	100 kHz	Buck-Boost	40-WFQFN Exposed Pad	2	Surface Mount	Transistor Driver	Step-Up/Step-Down	40-QFN (5x8)	80 %
Analog Devices LT8708IUHG-1#TRPBF	1	125 °C	-40 °C	80 V	2.8 V	Positive	400 kHz	100 kHz	Buck-Boost	40-WFQFN Exposed Pad	2	Surface Mount	Transistor Driver	Step-Up/Step-Down	40-QFN (5x8)	80 %
Analog Devices LT8708ELWE-1#PBF	1	125 ¯C	-40 °C	80 V	2.8 V	Positive	400 kHz	100 kHz	Buck-Boost	64-LQFP Exposed Pad	2	Surface Mount	Transistor Driver	Step-Up/Step-Down	64-LQFP-EP (10x10)	80 %	Enable
Analog Devices LT8708HUHG#PBF	1			80 V	2.8 V	Positive	400 kHz	100 kHz	Buck-Boost	40-WFQFN Exposed Pad	2	Surface Mount	Transistor Driver	Step-Up/Step-Down	40-QFN (5x8)	80 %
Analog Devices LT8708ELWE#PBF	1	125 ¯C	-40 °C	80 V	2.8 V	Positive	400 kHz	100 kHz	Buck-Boost	64-LQFP Exposed Pad	2	Surface Mount	Transistor Driver	Step-Up/Step-Down	64-LQFP-EP (10x10)	80 %	Enable
Analog Devices LT8708EUHG#TRPBF	1	125 °C	-40 °C	80 V	2.8 V	Positive	400 kHz	100 kHz	Buck-Boost	40-WFQFN Exposed Pad	2	Surface Mount	Transistor Driver	Step-Up/Step-Down	40-QFN (5x8)	80 %
Analog Devices LT8708HLWE-1#PBF	1	150 °C	-40 °C	80 V	2.8 V	Positive	400 kHz	100 kHz	Buck-Boost	64-LQFP Exposed Pad	2	Surface Mount	Transistor Driver	Step-Up/Step-Down	64-LQFP-EP (10x10)	80 %	Enable

Catalog

80V Synchronous 4-Switch Buck-Boost DC/DC Slave Controller for LT8708 Multiphase System

Key Features

• Single Inductor Allows VINAbove, Below, or Equal to VOUT

• Six Independent Forms of RegulationVINCurrent (Forward and Reverse)VOUTCurrent (Forward and Reverse)VINand VOUTVoltage

• VINCurrent (Forward and Reverse)

• VOUTCurrent (Forward and Reverse)

• VINand VOUTVoltage

• Forward and Reverse Discontinuous Conduction Mode Supported

• Supports MODE and DIR Pin Changes While Switching

• VINCHIPRange 2.8V (Need EXTVCC> 6.4V) to 80V

• VOUTRange: 1.3V to 80V

• Synchronous Rectification: Up to 99% Efficiency

• Available in 40-Lead (5mm × 8mm) QFN with High Voltage Pin Spacing and 64-Lead (10mm × 10mm) eLQFP

• AEC-Q100 Qualified for Automotive Applications

Description

The LT8708 is a high performance buck-boost switching regulator controller that operates from an input voltage that can be above, below or equal to the output voltage. Features are included to simplify bidirectional power conversion in battery/capacitor backup systems and other applications that may need regulation of VOUT, VIN, IOUT, and/or IIN. Forward and reverse current can be monitored and limited for the input and output sides of the converter. All four current limits (forward input, reverse input, forward output and reverse output) can be set independently using four resistors on the PCB.The MODE pin can select between discontinuous conduction mode (DCM), continuous conduction mode (CCM), hybrid conduction mode (HCM) and Burst Mode®operation. In combination with the DIR (direction) pin, the chip can be configured to process power only from VINto VOUTor only from VOUTto VIN. With a wide 2.8V to 80V input and 1.3V to 80V output range, the LT8708 is compatible with most solar, automotive, telecom and battery-powered systems.APPLICATIONSHigh Voltage Buck-Boost ConvertersBidirectional Charging SystemAutomotive 48V Systems