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reference designLTC3897-2

Analog Devices LTC3897-2

PolyPhase® Synchronous Boost Controller with Input/Output Protection

Overview

TopologyBoost Converter
Input voltage6-48 V
Switching frequency75-550 kHz
Output 148 V / 4 A

Description

The LT C®3897-2 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.

Features

  • Input Supply Range: 4.5V to 65V (Up to 75V Surge)
  • Reverse Input Protection to –40V
  • Inrush Current Control, Overcurrent Protection andOutput 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

Typical applications

  • Military/Avionics
  • Telecommunications
  • Automotive
  • Industrial

More information

Products

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Data­sheet
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Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Wire Type
SamplesAvailability & Sample
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7443632200
SPECWE-HCF SMT High Current Inductor, 22 µH, 13.8 A
Simu­lation
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCF SMT High Current Inductor
Inductance22 µH
Performance Rated Current13.8 A
Saturation Current @ 10%13 A
Saturation Current @ 30%15 A
DC Resistance11.72 mΩ
Self Resonant Frequency12.5 MHz
Wire TypeFlat 
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