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FULL DATA SHEET (PDF, 248kB) Download   E-Mail The MAX1999 evaluation kit (EV kit) demonstrates the MAX1999's standard application circuit. This DC-DC converter steps down high-voltage batteries and/or AC adapters, generating system supplies for notebook computers. The MAX1999 EV kit provides dual 5V and 3.3V output voltages from a 7V to 24V battery input range. It delivers up to 5A output current for the 5V output and 5A for the 3.3V output with greater than 90% efficiency. The EV kit operates at 200kHz/300kHz switching frequency (5V/3.3V, respectively) and has superior line-and-load- transient response. This EV kit is a fully assembled and tested circuit board. It allows the evaluation of other output voltages in the 2V to 5.5V range by changing feedback resistors R1-R4. This EV kit can also be used to evaluate the MAX1777 (200kHz/5.0V SMPS and 300kHz/3.3V SMPS) and the MAX1977 (400kHz/5.0V SMPS and 500kHz/3.3V SMPS).

Key Features		Applications/Uses
7V to 24V Input Voltage Range 3.3V and 5V Output Voltages 2V to 5.5V Adjustable Outputs (External Resistors) 5A Output Current (3.3V Output) 5A Output Current (5V Output) No Current-Sense Resistor Needed (MAX1999) Accurate Current Sense with Current-Sense Resistor (MAX1777/MAX1977) 200kHz/300kHz Switching Frequency (5V/3.3V, Respectively) Power-Good (PGOOD) Output Fault Protection Enable/Disable 28-Pin QSOP Package Low-Profile Components Fully Assembled and Tested		Cable Television Set-Top Boxes

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