MAX17067

The MAX17067 boost converter incorporates highperformance(at 1.2MHz), current-mode, fixed-frequency,pulse-width modulation (PWM) circuitry with a built-in 0.15 n-channel MOSFET to provide a highly efficient regulator with fast response.High switching frequency (640kHz or 1.2MHz selectable) allows for easy filtering and faster loop performance. An external compensation pin provides the user flexibility in determining loop dynamics, allowing the use of small,low equivalent-series-resistance (ESR) ceramic output capacitors. The device can produce an output voltage as high as 18V.

Features of the MAX17067 are:(1)90% efficiency; (2)adjustable output from VIN to 18V; (3)2.4A, 0.15, 22V power MOSFET; (4)+2.6V to +4.0V input range; (5)pin-selectable 640kHz or 1.2MHz switching frequency; (6)programmable soft-start; (7)small 8-pin MAX package; (8)integrated input voltage clamp circuit.External component value choice is primarily dictated by the output voltage and the maximum load current,as well as maximum and minimum input voltages.Begin by selecting an inductor value. Once L is known, choose the diode and capacitors.

The absolute maximum ratings of the MAX17067 can be summarized as:(1)LX to GND:-0.3V to +22V;(2)storage temperature range:-65 to +150;(3)junction temperature:150;(4)operating temperature range:-40 to 85;(5)IN to GND:-0.3V to 6V;(6)RMS LX pin current:1.2A.Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.The minimum inductance value, peak current rating, and series resistance are factors to consider when selecting the inductor. These factors influence the converter's efficiency, maximum output load capability, transientresponse time, and output voltage ripple. Physical size and cost are also important factors to be considered.

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