LTC3897
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3897

PolyPhase Synchronous Boost Controller with Input/Output Protection

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 12
1ku List Price Starting From $6.55
Features
  • 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
Additional Details
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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
Part Models 12
1ku List Price Starting From $6.55

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

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Sep 11, 2019

- 19_0190

LTC3897 Datasheet Electrical Specification Change

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Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3897EFE#PBF

PRODUCTION

LTC3897EFE#TRPBF

PRODUCTION

LTC3897HFE#PBF

PRODUCTION

LTC3897HFE#TRPBF

PRODUCTION

LTC3897IFE#PBF

PRODUCTION

LTC3897IFE#TRPBF

PRODUCTION

Sep 11, 2019

- 19_0190

arrow down

LTC3897 Datasheet Electrical Specification Change

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PRODUCTION

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PRODUCTION

LTC3897EUHF#TRPBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2108A

LTC3897 Demo Board | Synchronous Boost Controller, 16V ≤ VIN ≤ 55V, VOUT = 48V @ 4A to 12A

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DC2108A

LTC3897 Demo Board | Synchronous Boost Controller, 16V ≤ VIN ≤ 55V, VOUT = 48V @ 4A to 12A

LTC3897 Demo Board | Synchronous Boost Controller, 16V ≤ VIN ≤ 55V, VOUT = 48V @ 4A to 12A

Product Detail

Demonstration circuit DC2108 is DC/DC boost converter featuring the LTC3897 constant frequency current mode boost controller. The DC2108A operates over a 16V to 55V input and provides 4A to 12A of output current as shown in Figure 3. The 160kHz (2 •160kHz at the output) constant frequency operation results in a small and efficient circuit. The converter provides high output voltage accuracy (typically ±3%) over a wide load range with no minimum load requirement. The demonstration circuit can be easily modified to generate different output voltages.

Tools & Simulations

Tools & Simulations 1

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.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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