Low-Noise Step-Up DC-DC Converter

The MAX17067 boost converter incorporates high-performance (at 1.2MHz), current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in 0.15Ω 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.

Soft-start is programmed with an external capacitor, which sets the input-current ramp rate. The MAX17067 is available in a space-saving 8-pin µMAX® package. The ultra-small package and high switching frequency allow the total solution to be less than 1.1mm high.

Applications

* LCD Displays

* 90% Efficiency

* Adjustable Output from VIN to 18V

* 2.4A, 0.15Ω, 22V Power MOSFET

* +2.6V to +4.0V Input Range

* Pin-Selectable 640kHz or 1.2MHz Switching Frequency

* Programmable Soft-Start

* Small 8-Pin µMAX Package

* Integrated Input Voltage Clamp Circuit