(China (Mainland))
Product Summary
The LT3844IFE is a DC/DC controller used for medium power, low part count, high efficiency supplies. It offers a wide 4V-60V input range (7.5V minimum startup voltage) and can implement step-down, step-up, inverting and SEPIC topologies. The LT3844IFE includes Burst Mode operation, which reduces quiescent current below 120μA and maintains high efficiency at light loads. An internal high voltage bias regulator allows for simple biasing. The applications of the LT3844IFE include Industrial Power Distribution, 12V and 42V Automotive and heavy equipment, high voltage single board systems, distributed power systems, avionics, telecom power.
Parametrics
LT3844IFE absolute maximum ratings: (1)Input Supply Voltage (VIN): 65V to -0.3V; (2)Boosted Supply Voltage (BOOST): 80V to -0.3V; (3)Switch Voltage (SW) (Note 8): 65V to -1V; (4)Differential Boost Voltage (BOOST to SW): 24V to -0.3V; (5)Bias Supply Voltage (VCC): 24V to -0.3V ; (6)SENSE+ and SENSE– Voltages: 40V to -0.3V; (7)Differential Sense Voltage (SENSE+ to SENSE-): 1V to -1V; (8)BURST_EN Voltage: 24V to -0.3V; (9)SYNC, VC, VFB, CSS, and SHDN Voltages: 5V to -0.3V; (10)SHDN Pin Currents: 1mA; (11)Operating Junction Temperature Range: -40℃ to 125℃; (12)Storage Temperature: -65℃ to 150℃; (13)Lead Temperature (Soldering, 10 sec): 300℃.
Features
LT3844IFE features: (1)High Voltage Operation: Up to 60V; (2)Output Voltages up to 36V (Step-Down); (3)Programmable Constant Frequency: 100kHz to 500kHz; (4)Synchronizable up to 600kHz; (5)Burst Mode Operation: 120μA Supply Current; (6)10μA Shutdown Supply Current; (7)±1.3% Reference Accuracy; (8)Drives N-Channel MOSFET; (9)Programmable Soft-Start; (10)Programmable Undervoltage Lockout; (11)Internal High Voltage Regulator for Gate Drive; (12)Thermal Shutdown; (13)Current Limit Unaffected by Duty Cycle; (14)16-Pin Thermally Enhanced TSSOP Package.
Diagrams
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 LT3844IFE#PBF |
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IC REG CTRLR BST INV PWM 16TSSOP |
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LT3844IFE#TRPBF |
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IC REG CTRLR BST INV PWM 16TSSOP |
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