Datasheet LT8364 (Analog Devices)

ManufacturerAnalog Devices
DescriptionLow IQ Boost/SEPIC/Inverting Converter with 4A, 60V Switch
Pages / Page30 / 1 — FEATURES. DESCRIPTION. Wide Input Voltage Range: 2.8V to 60V. Ultralow …
File Size2.5 Mb

FEATURES. DESCRIPTION. Wide Input Voltage Range: 2.8V to 60V. Ultralow Quiescent Current and Low Ripple. Burst Mode

Datasheet LT8364 Analog Devices

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LT8364 Low IQ Boost/SEPIC/ Inverting Converter with 4A, 60V Switch
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 2.8V to 60V
The LT®8364 is a current mode DC/DC converter with a n
Ultralow Quiescent Current and Low Ripple
60V, 4A switch operating from a 2.8V to 60V input. With
Burst Mode
®
Operation: IQ = 9µA
a unique single feedback pin architecture it is capable n
4A, 60V Power Switch
of boost, SEPIC or inverting configurations. Burst Mode n
Positive or Negative Output Voltage Programming
operation consumes as low as 9µA quiescent current to
with a Single Feedback Pin
maintain high efficiency at very low output currents, while n
Programmable Frequency (300kHz to 2MHz)
keeping typical output ripple below 15mV. n Synchronizable to an External Clock An external compensation pin allows optimization of loop n Spread Spectrum Frequency Modulation for Low EMI bandwidth over a wide range of input and output volt- n BIAS Pin for Higher Efficiency ages and programmable switching frequencies between n Programmable Undervoltage Lockout (UVLO) 300kHz and 2MHz. A SYNC/MODE pin allows synchroni- n Thermally Enhanced 12-lead 4mm × 3mm DFN and zation to an external clock. It can also be used to select 16-lead MSOP packages between burst or pulse-skip modes of operation with or without Spread Spectrum Frequency Modulation for low
APPLICATIONS
EMI. For increased efficiency, a BIAS pin can accept a n Industrial and Automotive second input to supply the INTVCC regulator. Additional n Telecom features include frequency foldback and programmable n Medical Diagnostic Equipment soft-start to control inductor current during startup. n Portable Electronics The LT8364 is available in a thermally enhanced 12-lead All registered trademarks and trademarks are the property of their respective owners. 4mm × 3mm DFN package or a thermal y enhanced 16-lead MSOP package with four pins removed.
TYPICAL APPLICATION 2MHz, 48V Output Boost Converter Efficiency and Power Loss
VOUT 100 3.0 3.3μH VIN 48V 90 2.7 8V TO 38V 300mA AT VIN = 8V 4.7µF 640mA AT VIN = 12V 80 EFFICIENCY 2.4 V 1A AT V 1M IN = 24V IN SW 70 2.1 POWER LOSS (W) LT8364 FBX 4.7µF 60 1.8 EN/UVLO BIAS x2 50 1.5 POWER LOSS INTVCC 40 1.2 SYNC/MODE EFFICIENCY (%) 30 0.9 RT SS GND VC 1µF 34.8k 20 0.6 VIN = 12V 20k 36.5k 10 V 0.3 IN = 24V 10nF 2.2nF 0 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 LOAD CURRENT (A) 8364 TA01a 8364 TA01b 8364f For more information www.linear.com/LT8364 1 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS