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Product OverviewThe MAX1771ESA+ is an adjustable, high-efficiency, low IQ, Step-up DC-DCController. The MAX1771 step-up switching controller provides 90% efficiencyover a 30mA to 2A load. A unique current-limited pulse-frequency-modulation(PFM) control scheme gives this device the benefits of pulse-width modulation(PWM) converters (high efficiency at heavy loads), while using less than 110µAof supply current (vs.2 to 10mA for PWM converters). This controller usesminiature external components. Its high switching frequency (up to 300kHz)allows surface-mount magnetic of 5mm height and 9mm diameter. It accepts inputvoltages from 2 to 16.5V. The output voltage is preset at 12V or can be adjustedusing two resistors. The MAX1771 optimizes efficiency at low input voltages andreduces noise by using a single 100mV current-limit threshold under all loadconditions.90% Efficiency for 30mA to 2A load currentsUp to 24W output power110µA Maximum supply current5µA Maximum shutdown currentCurrent-limited PFM control schemeApplicationsPower Management, Communications & Networking, IndustrialProduct InformationDevice Type: -IC Interface Type: -No. of Drivers: -Supply Voltage Min: 2VSupply Voltage Max: 16.5VDriver Case Style: -No. of Pins: 8PinsOperating Temperature Min: -40°COperating Temperature Max: 85°CProduct Range: -Automotive Qualification Standard: -MSL: MSL 1 - Unlimited