LT8711 Series

Micropower Synchronous Multitopology Controller with 42V Input Capability

Catalog

Micropower Synchronous Multitopology Controller with 42V Input Capability

Part	Mounting Type	Supplier Device Package	Number of Outputs	Duty Cycle (Max) [Max]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Function	Control Features	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Output Configuration	Topology	Frequency - Switching [Max]	Frequency - Switching [Min]	Package / Case [custom]	Package / Case [custom]	Package / Case [custom]
Analog Devices LT8711IUDC#TRPBF	Surface Mount	20-QFN (3x4)	1	100 %	42 V	4.5 V	Step-Down Step-Up	Enable Frequency Control Soft Start	-40 °C	125 ¯C	20-WFQFN Exposed Pad	Positive	Boost Buck Buck-Boost SEPIC	750 kHz	100 kHz
Analog Devices LT8711EFE#TRPBF	Surface Mount	20-TSSOP-EP	1	100 %	42 V	4.5 V	Step-Down Step-Up	Enable Frequency Control Soft Start	-40 °C	125 ¯C		Positive	Boost Buck Buck-Boost SEPIC	750 kHz	100 kHz	0.173 in 4.4 mm	Exposed Pad	20-TSSOP
Analog Devices LT8711EFE#PBF	Surface Mount	20-TSSOP-EP	1	100 %	42 V	4.5 V	Step-Down Step-Up	Enable Frequency Control Soft Start	-40 °C	125 ¯C		Positive	Boost Buck Buck-Boost SEPIC	750 kHz	100 kHz	0.173 in 4.4 mm	Exposed Pad	20-TSSOP
Analog Devices LT8711EUDC#TRPBF	Surface Mount	20-QFN (3x4)	1	100 %	42 V	4.5 V	Step-Down Step-Up	Enable Frequency Control Soft Start	-40 °C	125 ¯C	20-WFQFN Exposed Pad	Positive	Boost Buck Buck-Boost SEPIC	750 kHz	100 kHz
Analog Devices LT8711IFE#TRPBF	Surface Mount	20-TSSOP-EP	1	100 %	42 V	4.5 V	Step-Down Step-Up	Enable Frequency Control Soft Start	-40 °C	125 ¯C		Positive	Boost Buck Buck-Boost SEPIC	750 kHz	100 kHz	0.173 in 4.4 mm	Exposed Pad	20-TSSOP

Catalog

Micropower Synchronous Multitopology Controller with 42V Input Capability

Key Features

• Easily Configurable as a Synchronous Buck, Boost, SEPIC, ZETA or Nonsynchronous Buck-Boost Converter

• Wide Input Range: 4.5V to 42V (VINCan Operate to 0V, when EXTVCC> 4.5V)

• Automatic Low Noise Burst Mode®Operation

• Low IQin Burst Mode Operation (15μA Operating)

• Input Voltage Regulation for High Impedance Source

• 100% Duty Cycle in Dropout (Buck Mode)

• 2A Gate Drivers (BG and TG) n Adjustable Soft-Start with One Capacitor

• Frequency Programmable from 100kHz to 750kHz

• Can Be Synchronized to External Clock

• Available in 20-Lead TSSOP and 20-Lead 3mm×4mm QFN Packages

Description

The LT8711 is a multi-topology current mode PWM controller that can easily be configured as a synchronous buck, boost, SEPIC, ZETA or as a nonsynchronous buck-boost converter. Its dual gate drive voltage inputs optimize gate driver efficiency.The 15µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery powered systems. Low ripple Burst Mode operation enables high efficiency at very light loads while maintaining low output voltage ripple. The LT8711's fixed switching frequency can be set from 100kHz to 750kHz or can be synchronized to an external clock.The additional features include 100% duty cycle capability when in buck mode, a topology selection pin and adjustable soft-start. LT8711 is available in the 20-lead TSSOP and 20-lead 3mm × 4mm QFN packages.ApplicationsGeneral Purpose DC/DC ConversionAutomotive SystemsIndustrial SuppliesSolar Panel Power Converter