LT8708IUHG-1#PBF

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Analog Devices Inc./Maxim Integrated

80V SYNCHRONOUS 4-SWITCH BUCK-BOOST DC/DC SLAVE CONTROLLER FOR LT8708 MULTIPHASE SYSTEM

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LT8708IUHG-1#PBF

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Analog Devices Inc./Maxim Integrated

80V SYNCHRONOUS 4-SWITCH BUCK-BOOST DC/DC SLAVE CONTROLLER FOR LT8708 MULTIPHASE SYSTEM

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT8708-1 Series

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 VINcurrent and reverse VINcurrent) are available on each slave that can be set independently.ApplicationsHigh Voltage Buck-Boost ConvertersBidirectional Charging SystemsAutomotive 48V Systems

Technical Specifications

Parameters and characteristics for this part

Specification	LT8708IUHG-1#PBF

Clock Sync	Yes
Duty Cycle (Max)	80 %
Frequency - Switching (Max)	400 kHz
Frequency - Switching (Min)	100 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Package / Case	40-WFQFN Exposed Pad
Package Length	5 mm
Package Name	40-QFN
Package Width	8 mm
Synchronous Rectifier	Yes
Topology	Buck-Boost
Voltage - Supply (Vcc/Vdd) Maximum	80 V
Voltage - Supply (Vcc/Vdd) Minimum	2.8 V

LT8708-1 Series

Part	Output Configuration	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum	Frequency - Switching (Min)	Frequency - Switching (Max)	Mounting Type	Operating Temperature (Max)	Operating Temperature (Min)	Output Type	Number of Outputs	Package Name	Package Width	Package Length	Output Phases	Function	Synchronous Rectifier	Package / Case	Duty Cycle (Max)	Topology	Clock Sync	Control Features
Analog Devices Inc./Maxim Integrated LT8708EUHG-1#TRPBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	125 °C	-40 °C	Transistor Driver	1	40-QFN	8 mm	5 mm	2	Step-Down Step-Up	Yes	40-WFQFN Exposed Pad	80 %	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT8708IUHG-1#TRPBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	125 °C	-40 °C	Transistor Driver	1	40-QFN	8 mm	5 mm	2	Step-Down Step-Up	Yes	40-WFQFN Exposed Pad	80 %	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT8708ELWE-1#PBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	125 °C	-40 °C	Transistor Driver	1	64-LQFP-EP	10 mm	10 mm	2	Step-Down Step-Up	Yes	64-LQFP Exposed Pad	80 %	Buck-Boost	Yes	Enable
Analog Devices Inc./Maxim Integrated LT8708IUHG-1#PBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	125 °C	-40 °C	Transistor Driver	1	40-QFN	8 mm	5 mm	2	Step-Down Step-Up	Yes	40-WFQFN Exposed Pad	80 %	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT8708EUHG-1#PBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	125 °C	-40 °C	Transistor Driver	1	40-QFN	8 mm	5 mm	2	Step-Down Step-Up	Yes	40-WFQFN Exposed Pad	80 %	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT8708ILWE-1#PBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	125 °C	-40 °C	Transistor Driver	1	64-LQFP-EP	10 mm	10 mm	2	Step-Down Step-Up	Yes	64-LQFP Exposed Pad	80 %	Buck-Boost	Yes	Enable
Analog Devices Inc./Maxim Integrated LT8708HUHG-1#PBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	150 °C	-40 °C	Transistor Driver	1	40-QFN	8 mm	5 mm	2	Step-Down Step-Up	Yes	40-WFQFN Exposed Pad	80 %	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT8708HUHG-1#TRPBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	150 °C	-40 °C	Transistor Driver	1	40-QFN	8 mm	5 mm	2	Step-Down Step-Up	Yes	40-WFQFN Exposed Pad	80 %	Buck-Boost	Yes
Analog Devices Inc./Maxim Integrated LT8708HLWE-1#PBF	Positive	80 V	2.8 V	100 kHz	400 kHz	Surface Mount	150 °C	-40 °C	Transistor Driver	1	64-LQFP-EP	10 mm	10 mm	2	Step-Down Step-Up	Yes	64-LQFP Exposed Pad	80 %	Buck-Boost	Yes	Enable

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT8708IUHG-1#PBF | Datasheet

LT8708-1: 80V Synchronous 4-Switch Buck-Boost DC/DC Slave Controller for LT8708 Multiphase System Data Sheet (Rev.B)