Overview
Features and Benefits
- Input Supply Range: 4.5V to 65V (Up to 75V Surge)
- Reverse Input Protection to –40V
- In-Rush 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
Product Details
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.
Applications
- Industrial
- Automotive
- Military/Avionics
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
-
R526 Reliability Data3/26/2018PDF365 K
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DC2108A - Demo Manual11/30/2016PDF479K
Tools & Simulations
LTspice
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
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Models for the following parts are available in LTspice:
Design Resources
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PCN-PDN Information
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Support & Discussions
LTC3897 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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Evaluation Boards
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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.