IC manufacturers Analog Devices

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Analog Devices LT8364 | Demoboard LT Journal April 2018

Low IQ Boost/SEPIC/Inverting Converter with 4A, 60V Switch

Overview

TopologyBoost Converter
Input voltage5-20 V
Switching frequency300-2000 kHz
Output 124 V / 1.4 A
IC revision1

Description

The LT8364 is a current mode DC/DC converter with a 60V, 4A switch operating from a 2.8V to 60V input. With a unique single feedback pin architecture it is capable of boost, SEPIC or inverting configurations. Burst Mode operation consumes as low as 9μA quiescent current tomaintain high efficiency at very low output currents, while keeping typical output ripple below 15mV. An external compensation pin allows optimization of loop bandwidth over a wide range of input and output voltages and programmable switching frequencies between 300kHz and 2MHz. A SYNC/MODE pin allows synchronization to an external clock. It can also be used to select between burst or pulse-skip modes of operation with or without Spread Spectrum Frequency Modulation for low EMI. For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional features include frequency foldback and programmable soft-start to control inductor current during startup.The LT8364 is available in a thermally enhanced 12-lead 4mm × 3mm DFN package or a thermally enhanced 16-lead MSOP package with four pins removed.

Features

  • Wide Input Voltage Range: 2.8V to 60V
  • Ultralow Quiescent Current and Low RippleBurst Mode® Operation: IQ = 9μA
  • 4A, 60V Power Switch
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • Programmable Frequency (300kHz to 2MHz)
  • Synchronizable to an External Clock
  • Spread Spectrum Frequency Modulation for Low EMI
  • BIAS Pin for Higher Efficiency
  • Programmable Undervoltage Lockout (UVLO)
  • Thermally Enhanced 12-lead 4mm × 3mm DFN and 16-lead MSOP packages

Typical applications

  • Industrial and Automotive
  • Telecom
  • Portable Electronics
  • Medical Diagnostic Equipment

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IR
(A)
ISAT1
(A)
ISAT2
(A)
fres
(MHz)
VersionIRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
MountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(mΩ)
Type Samples
74479299147SPEC
8 files WE-PMCI Power Molded Chip Inductor 0.47 11.05 5.15 9.95 90 High Saturation Current 11.05 SMT 3600 22
74437324022SPEC
8 files WE-LHMI SMT Power Inductor 2.2 49 4.05 4.45 8.4 SMT 61
742792040SPEC
9 files WE-CBF SMT EMI Suppression Ferrite Bead 1.5 SMT SMT 600 700 150 MHz 2000 150 High Current
Order Code Data­sheet Simu­lation
74479299147SPEC
74437324022SPEC
742792040SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IR
(A)
ISAT1
(A)
ISAT2
(A)
fres
(MHz)
VersionIRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
MountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(mΩ)
Type Samples