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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LT8604 데이터시트(PDF) 1 Page - Analog Devices |
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LT8604 데이터시트(HTML) 1 Page - Analog Devices |
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1 / 20 page  LT8604 1 Rev. 0 For more information www.analog.com Document Feedback High Efficiency 42V/120mA Synchronous Buck All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION FEATURES DESCRIPTION The LT®8604 is a compact, high speed synchronous monolithic step-down switching regulator that delivers up to 120mA with high efficiency at constant switching fre- quency, even up to 2.2MHz. It accepts a wide input voltage range up to 42V, and consumes only 2.5µA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. Additional features provide for flexible and robust opera- tion. Internal compensation with peak current mode topol- ogy allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN under voltage lockout or to shut down the LT8604 reducing the input supply current to 1µA. A PG flag sig- nals when VOUT is within ±7.5% of the programmed out- put voltage as well as fault conditions. Thermal shutdown provides additional protection. The LT8604 is available in a small 10-Lead 3mm × 2mm DFN package with exposed pad for low thermal resistance. 5V, Step-Down Converter APPLICATIONS n High Efficiency 2MHz Synchronous Operation n > 90% Efficiency at 50mA, 12VIN to 5VOUT n Ultralow Quiescent Current Burst Mode® Operation n < 2.5µA IQ Regulating 24VIN to 3.3VOUT n Output Ripple < 10mVP-P n Wide Input Voltage Range: 3.2V to 42V n Fast Minimum Switch-On Time: 35ns n Adjustable Switching Frequency: 200kHz to 2.2MHz n Allows Tiny Inductors n Accurate 1V Enable Pin Threshold n Internal Compensation n Output Soft-Start and Tracking n Small 10-Lead 3mm × 2mm Side-Wettable DFN Package n AEC-Q100 Qualified for Automotive Applications n Industrial Sensors n Industrial Internet of Things n 4mA to 20mA Current Loops n Flow Meters n Automotive Housekeeping Supplies Efficiency at VOUT = 5V 100µH 10µF 1µF 60.4k 1µF 47nF 1M 187k VIN EN/UV FB TR/SS RT INTVCC SW GND VOUT 5V 120mA PG VIN 5.9V TO 42V fSW = 700kHz LT8604 BIAS BST ON OFF 8604 TA01a VIN = 12V VIN = 24V VIN = 36V fSW = 700kHz LOAD CURRENT (mA) 0 20 40 60 80 100 120 60 65 70 75 80 85 90 95 100 8604 TA01b |
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