Transcription of LTC7821 (REV A) - Analog Devices
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LTC7821 (REV A) - Analog Devices
LTC7821 . Hybrid step - down synchronous Controller FEATURES DESCRIPTION. nn Wide VIN Range: 10V to 72V (80V ABS Max) The LTC 7821 uses a proprietary architecture that merges nn Soft Switching for Low Noise Operation a soft switching charge pump topology with a synchro- nn Phase-Lockable Fixed Frequency 200kHz to nous step - down converter to provide superior efficiency nn 1% Output Voltage Accuracy and EMI performance compared to traditional switching nn R. SENSE or DCR Current Sensing architectures. nn Programmable CCM, DCM, or Burst Mode Operation In a typical 48V to 12V application, efficiency of greater nn CLKOUT Pin for Multiphase Operation than 97% is attainable with the LTC7821 switching at nn Short Circuit Protected 500kHz. The same efficiency can only be achieved with a nn EXTV. CC Input for Improved Efficiency traditional controller switching at one-third the frequency. nn Monotonic Output Voltage Start-Up Higher switching frequencies allow the use of smaller in- nn Optional External Reference ductances that yield faster transient response and smaller nn 32-Pin (5mm 5mm) QFN.
Hybrid Step-Down Synchronous Controller Efficiency at Various VIN for VOUT = 12V All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, Including 9484799. n Wide VIN Range: 10V to 72V (80V ABS Max) n Soft Switching for Low Noise Operation n Phase-Lockable Fixed Frequency 200kHz to 1.5MHz
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