LTC3897-2

RECOMMENDED FOR NEW DESIGNS

PolyPhase^® Synchronous Boost Controller with Input/Output Protection

Data Sheet (Rev. A) Product Selection Table

Part Models: 6
1ku List Price: Starting From $5.95

Viewing:

Overview

Input Supply Range: 4.5V to 65V (Up to 75V Surge)
Reverse Input Protection to –40V
Inrush Current Control, Overcurrent Protection and Output Disconnect for Boost Converter
Input Voltage Surge Protection with Adjustable Clamp Voltage
Onboard Ideal Diode Controller
Low Quiescent Current: 55µA

2-Phase Operation Reduces Required Input and Output Capacitance and Noise
Output Voltage Up to 60V
Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) for Logic-Level or Standard Threshold FETs
No External Bootstrap Diodes Required
5mm × 9mm QFN-44 Package with High Voltage Pin Spacing

The LTC3897-2 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 inrush 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 differences between the LTC3897-2 and LTC3897 are shown in Table 1.

Applications

Industrial
Automotive
Military/Avionics
Telecommunications

Part Models: 6
1ku List Price: Starting From $5.95

Documentation

Data Sheet 1

LTC3897-2: PolyPhase^® Synchronous Boost Controller with Input/Output Protection Data Sheet (Rev.A) 04/18/2019

Reliability Data 1

R526 Reliability Data 03/26/2018

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3897EUHG-2#PBF	44(38)-Lead Plastic QFN (5mm × 8mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3897EUHG-2#TRPBF	44(38)-Lead Plastic QFN (5mm × 8mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3897HUHG-2#PBF	44(38)-Lead Plastic QFN (5mm × 8mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3897HUHG-2#TRPBF	44(38)-Lead Plastic QFN (5mm × 8mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3897IUHG-2#PBF	44(38)-Lead Plastic QFN (5mm × 8mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3897IUHG-2#TRPBF	44(38)-Lead Plastic QFN (5mm × 8mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC3897

LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

LTC3897

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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