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LT8331 データシート(PDF) 1 Page - Analog Devices |
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LT8331 データシート(HTML) 1 Page - Analog Devices |
1 / 30 page LT8331 1 Rev. C For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION Low IQ Boost/SEPIC/Flyback/Inverting Converter with 0.5A, 140V Switch The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capa- ble of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very low output cur- rents, while keeping typical output ripple below 20mV. The internally-compensated current mode architecture results in stable operation over a wide range of input and output voltages and programmable switching frequencies between 100kHz to 500kHz. A SYNC/MODE pin allows synchronization to an external clock. It can also be used to select between burst or pulse-skipping modes of opera- tion. 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 for controlling inductor current during start-up. The LT8331 is available in a thermally-enhanced MSOP package with four pins removed for high voltage spacings. 48V Output SEPIC Converter APPLICATIONS n Wide Input Voltage Range: 4.5V to 100V n Ultralow Quiescent Current and Low Ripple Burst Mode® Operation: IQ = 6µA n 0.5A, 140V Power Switch n Positive or Negative Output Voltage Programming with a Single Feedback Pin n Programmable Frequency (100kHz to 500kHz) n Synchronizable to an External Clock n BIAS Pin for Higher Efficiency n Programmable Undervoltage Lockout (UVLO) n Thermally-Enhanced High Voltage MSOP Package n AEC-Q100 Qualified for Automotive Applications n Industrial and Automotive n Telecom n Medical Diagnostic Equipment n Portable Electronics Efficiency and Power Loss 8331 TA01a • 34.8k 2.2µF 1M 59k 0.1µF 63.4k 1µF VOUT = 48V IN SW1-2 EN/UVLO LT8331 VIN 36V TO 72V 220 H 1M 220 H 150mA AT VIN = 36V 165mA AT VIN = 48V 190mA AT VIN = 72V SYNC/MODE GND FBX BIAS SS VOUT 450kHz 4.7µF ×4 1µF ×2 V RT INTVCC EFFICIENCY POWER LOSS VIN = 36V VIN = 48V VIN = 72V LOAD CURRENT (mA) 0 50 100 150 200 0 10 20 30 40 50 60 70 80 90 100 0 0.5 1.0 1.5 2.0 8331 TA01b All registered trademarks and trademarks are the property of their respective owners. |
同様の部品番号 - LT8331 |
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同様の説明 - LT8331 |
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