LTC3897HUHG-2#PBF

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Analog Devices Inc./Maxim Integrated

POLYPHASE®SYNCHRONOUS BOOST CONTROLLER WITH INPUT/OUTPUT PROTECTION

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LTC3897HUHG-2#PBF

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Analog Devices Inc./Maxim Integrated

POLYPHASE®SYNCHRONOUS BOOST CONTROLLER WITH INPUT/OUTPUT PROTECTION

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3897 Series

The LTC3897 is a synchronous boost DC/DC controller with surge stopper and ideal diode controller.The boost controller drives two N-channel power MOSFET stages out-of-phase to reduce input and output capacitor requirements, allowing the use of smaller inductors than the single-phase equivalent. Synchronous rectification reduces power loss and eases thermal requirements.The surge stopper controls the gate of an external N-channel MOSFET to protect against high voltage input transients and provides in-rush current control, overcurrent protection and output disconnect for the boost converter. The integrated ideal diode controller drives another N-channel MOSFET to replace a Schottky diode for reverse input protection and voltage holdup or peak detection. It controls the forward voltage drop across the MOSFET and minimizes reverse current flow.The LTC3897 is available in thermally-enhanced 38-pin leadless QFN or 38-lead TSSOP packages.ApplicationsIndustrialAutomotiveMilitary/Avionics

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3897HUHG-2#PBF

Clock Sync	Yes
Control Features	Current Limit, Ramping, Overcurrent, Frequency Control
Frequency - Switching (Max)	850 kHz
Frequency - Switching (Min)	75 kHz
Function	Step-Up
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Package / Case	38-WFQFN Exposed Pad
Package Length	5 mm
Package Name	38-QFN
Package Width	7 mm
Synchronous Rectifier	Yes
Topology	Boost
Voltage - Supply (Vcc/Vdd) Maximum	65 V
Voltage - Supply (Vcc/Vdd) Minimum	4.5 V

LTC3897 Series

PolyPhase Synchronous Boost Controller with Input/Output Protection

Part	Mounting Type	Topology	Number of Outputs	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Function	Output Type	Output Configuration	Operating Temperature (Min)	Operating Temperature (Max)	Output Phases	Control Features	Frequency - Switching (Min)	Frequency - Switching (Max)	Package Width	Package Name	Package Length	Clock Sync	Package / Case	Synchronous Rectifier	Regulator Topology	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Total Output Count	Non-Isolated Output Count	Current - Output	Frequency - Switching	Contents	Main Purpose	Utilized IC / Part	Voltage - Output	Package Features
Analog Devices Inc./Maxim Integrated LTC3897HUHG-2#TRPBF	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	150 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	7 mm	38-QFN	5 mm	Yes	38-WFQFN Exposed Pad	Yes
Analog Devices Inc./Maxim Integrated LTC3897EUHF#TRPBF	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	125 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	7 mm	38-QFN	5 mm	Yes	38-WFQFN Exposed Pad	Yes
Analog Devices Inc./Maxim Integrated DC2108A							Non-Isolated														Boost	16 V	55 V	1	1 count	12 A	160 kHz	Board	DC/DC Step Up	LTC3897	48 V
Analog Devices Inc./Maxim Integrated LTC3897IFE	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	125 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	4.4 mm	38-TFSOP 38-TSSOP-EP	0.173 in	Yes		Yes												Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3897IUHF#TRPBF	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	125 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	7 mm	38-QFN	5 mm	Yes	38-WFQFN Exposed Pad	Yes
Analog Devices Inc./Maxim Integrated LTC3897HFE#TRPBF	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	150 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	4.4 mm	38-TFSOP 38-TSSOP-EP	0.173 in	Yes		Yes												Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3897EFE#PBF	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	125 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	4.4 mm	38-TFSOP 38-TSSOP-EP	0.173 in	Yes		Yes												Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3897EUHG-2#PBF	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	125 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	7 mm	38-QFN	5 mm	Yes	38-WFQFN Exposed Pad	Yes
Analog Devices Inc./Maxim Integrated LTC3897HUHF#TRPBF	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	150 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	7 mm	38-QFN	5 mm	Yes	38-WFQFN Exposed Pad	Yes
Analog Devices Inc./Maxim Integrated LTC3897IFE#PBF	Surface Mount	Boost	2	4.5 V	65 V	Step-Up	Transistor Driver	Positive	-40 °C	125 °C	2	Current Limit Frequency Control Overcurrent Ramping	75 kHz	850 kHz	4.4 mm	38-TFSOP 38-TSSOP-EP	0.173 in	Yes		Yes												Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R526 Reliability Data

Package Drawing - 44(38)-Lead Plastic QFN (5mm × 8mm)

LTC3897-2: PolyPhase®Synchronous Boost Controller with Input/Output Protection Data Sheet (Rev.A)