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MAX1623 - 3A / Low-Voltage / Step-Down Regulator

General Description

The MAX1623 switch-mode buck regulator with synchronous rectification provides local CPU and bus-termination power in notebook and desktop computers.

Key Features

  • constant-off-time, current-mode pulse-width-modulation (PWM) control with switching frequencies as high as 350kHz. An external resistor at the TOFF pin sets the off-time, allowing optimum design flexibility in terms of switching frequency, output switching noise, and inductor size. This device is available in a space-saving 20-pin SSOP package. ____________________________Features o ±1% Output Accuracy, Including Line and Load Regulation o 94% Efficiency o Internal Switches 55mΩ PMOS Power Swit.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-1436; Rev 1; 9/99 NUAL KIT MA ATION EET H S A EVALU T WS DA FOLLO 3A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches General Description The MAX1623 switch-mode buck regulator with synchronous rectification provides local CPU and bus-termination power in notebook and desktop computers. An internal 55mΩ (typ), 3A PMOS power switch and 60m Ω (typ), 3A NMOS synchronous-rectifier switch deliver continuous load currents up to 3A from a 5V supply with 95% typical efficiency. Output accuracy is ±1%, including line and load regulation. The MAX1623 features constant-off-time, current-mode pulse-width-modulation (PWM) control with switching frequencies as high as 350kHz.