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MAX629 28V, Low-Power, High-Voltage, Boost or Inverting DC-DC Converter

Maxim-Dallas

The MAX629 low-power DC-DC converter features an internal N-channel MOSFET switch and programmable current limiting. It is designed to supply positive or negative bias voltages up to ±28V from input voltages in the 0.8V to VOUT range, and can be configured for boost, flyback, and SEPIC topologies.

The MAX629's current-limited pulse-frequency-modulation (PFM) control scheme provides high efficiency over a wide range of load conditions. An internal, 0.5A N-channel MOSFET switch reduces the total part count, and a high switching frequency (up to 300kHz) allows for tiny surface-mount magnetics.

The MAX629's combination of low supply current, logic-controlled shutdown, small package, and tiny external components makes it an extremely compact and efficient high-voltage biasing solution that's ideal for battery-powered applications. The MAX629 is available in an 8-pin SO package.

* Internal, 500mA, 28V N-Channel Switch (No External FET Required) * Generates Positive or Negative Output Voltages * 80µA Supply Current * 1µA Max Shutdown Current * Up to 300kHz Switching Frequency * Adjustable Current Limit Allows Use of Small, Inexpensive Inductors * 8-Pin SO Package

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