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ETA3555CSU Datasheet(PDF) 1 Page - ETA SOLUTIONS CO. LIMITED |
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ETA3555CSU Datasheet(HTML) 1 Page - ETA SOLUTIONS CO. LIMITED |
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1 / 1 page  ETA3555 www.etasolution.com 1 Powering Minds of the Smart 5A, 2.2MHz I2C Controlled Output Synchronous Step-Down Converter DESCRIPTION FEATURES The ETA3555 is a high-efficiency, DC-to-DC step-down switching regulator, capable of delivering up to 5A of pulse load. It integrates an I2C interface that dynamically scales the output voltages on demand. The DCDC control block belongs to a new breed of high frequency synchronous Step-Down converter that combines the advantages of voltage mode control and Constant-On- Time control. Its adaptive Constant-On-Time control dynamically changes switch on time to achieve a constant switching frequency. It does not have the minimum on- time constrain normally a fixed-frequency current mode Step-down requires, allowing it to go down to very low duty ratio without affecting loop stability. The voltage mode nature also provides a more superior load transient response and a seamless transition from PFM to PWM modes. Cycle-by-cycle current limit provides output short-circuit protection and an input OVP function guards ETA3555 against possible input voltage surge. ETA3555 is housed in a 2mm x 1.6mm CSP-20 Package. I2C Dynamic Output Control Synchronous High Efficiency up to 95% Fast load transient response Capable of Delivering 5A Input OVP at 6V No External Schottky Diode Needed Thermal shutdown and UVLO CSP-20 (4x5) package APPLICATIONS ARM based CPUs Smart Phone Tablet, MID Smart Set-Top Box, OTT ORDERING INFORMATION PART PACKAGE PIN TOP MARK ETA3555CSU CSP-20 (4x5) 3555 YWWL ( Date Code) TYPICAL APPLICATION VOUT VIN 2.5V to 5.5V 0.33uH ETA3555 22uF x 2 10uF AVIN/PVIN EN AGND/PGND SW FB SDA SCL VSEL I2C 20uF Typical Application Circuit |
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