IC manufacturers Analog Devices

IC manufacturers (103)

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

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

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT1(A)
ISAT2(A)
fres(MHz)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
Mount
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR 2(mA)
RDC max.(mΩ)
Type
Samples
WE-PMCI Power Molded Chip Inductor, 0.47 µH, 7.1 A
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance0.47 µH
Rated Current7.1 A
Saturation Current 15.15 A
Saturation Current 29.95 A
Self Resonant Frequency90 MHz
Performance Rated Current7.1 A
Saturation Current @ 10%5.15 A
Saturation Current @ 30%9.95 A
MountSMT 
Rated Current 23600 mA
DC Resistance22 mΩ
WE-LHMI SMT Power Inductor, 2.2 µH, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance2.2 µH
Self Resonant Frequency49 MHz
Performance Rated Current4.05 A
Saturation Current @ 10%4.45 A
Saturation Current @ 30%8.4 A
MountSMT 
DC Resistance61 mΩ
WE-CBF SMT EMI Suppression Ferrite Bead, –, 1.5 A
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Rated Current1.5 A
MountSMT 
Impedance @ 100 MHz600 Ω
Maximum Impedance700 Ω
Maximum Impedance150 MHz 
Rated Current 22000 mA
DC Resistance150 mΩ
TypeHigh Current