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LT8610AC Datasheet(PDF) 1 Page - Analog Devices |
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LT8610AC Datasheet(HTML) 1 Page - Analog Devices |
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1 / 31 page  Data Sheet LT8615 42V, 3.5A Synchronous Step-down Regulator with 2.5µA Quiescent Current Rev 0 DOCUMENT FEEDBACK TECHNICAL SUPPORT One Analog Wa y, Wilmington, MA 01887 -2356, U.S.A. Tel: 781.329.47 00 ©2024 Analog Devices, Inc. Al l rights rese rve d. FEATURES Wide Input Voltage Range: 3V to 42V Wide Output Voltage Range: 0.787V to (VIN – 0.4V) Ultralow Quiescent Current Burst Mode® Operation: <2.5μA IQ Regulating 12VIN to 3.3VOUT Output Ripple <10mVP-P Silent Switcher® Powertrain for Ultralow EMI Emissions High Efficiency 2MHz Synchronous Operation: Up to 93% Efficiency at 2MHz, 12VIN to 5VOUT Fast Minimum Switch-On Time: 40ns Very Low Dropout: 125mV at 1A Adjustable and Synchronizable: 400kHz to 2.5MHz Optional Spread-Spectrum Frequency Modulation Fixed Frequency Peak Current-Mode Operation Accurate 1V Enable Pin Threshold Output Soft-Start and Tracking Small 3mm × 3mm Side Wettable QFN Package Clearance Between HighVoltageandLowVoltagePins Excellent Solder Joint Reliability AEC-Q100 Qualified for Automotive Applications Temperature Grade 0: −40°C to +150°C, TA GENERAL DESCRIPTION The LT®8615 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that can deliver 3.5A of continuous current. The LT8615’s ultralow 2.5µA quiescent current in Burst Mode operation (with the output in full regulation) enables high efficiency down to very low load currents while keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock or spread-spectrum modulation for low EMI operation. Internal compensation with peak current-mode topology 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 UVLO or to shut down the part. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. An open-drain PG pin flag signals when the output is within ±8% as well as fault conditions. All registered trademarks and trademarks are the property of their respective owners. APPLICATIONS Automotive and Industrial Supplies Low EMI Step-Down TYPICAL APPLICATION Figure 1. 5V, 3.5A Step-Down Converter Figure 2. 12VIN to 5VOUT Efficiency 0.1µF 10pF 1µF 1.5µH 18.2kΩ 100kΩ 10nF VIN EN/UV SYNC LT8615 INTVCC TR/SS RT GND PG SW BST VIN 5.4V TO 42V PG fSW = 2MHz L1 = COILCRAFT XGL4030-152ME 4.7µF VOUT 5V, 3.5A 2× 47µF 1210 FB 187kΩ 1MΩ L = 2.2µH fSW = 2MHz IOUT (A) 0 0.5 1.0 1.5 2.0 2.5 3.0 50 55 60 65 70 75 80 85 90 95 100 |
Similar Part No. - LT8610AC |
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Similar Description - LT8610AC |
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