MAX761ESA Datasheet

PMIC - Voltage Regulators - DC DC Switching Regulators


The MAX761ESA /MAX762 step-up switching regulators provide high efficiency over a wide range of load currents,delivering up to 150mA. A unique, current-limited pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency with heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.The MAX761/MAX762 input voltage range is 2V to 16.5V.Output voltages are preset to 12V (MAX761ESA) and 15V(MAX762), or they can be set with two external resistors. With a 5V input, the MAX761 guarantees a 12V, 150mA output. Its high efficiency, low supply current, fast start-up time, SHDN controlling capability, and small size make the MAX761ESA ideal for powering flash memory.The MAX761/MAX762 have an internal 1A power MOSFET, making them ideal for minimum-component, low- and medium-power applications. These devices use tiny external components, and their high switching frequencies (up to 300kHz) allow for small surface-mount magnetics.For increased output drive capability or higher output voltages, use the MAX770–MAX773, which are similar in design to the MAX761/MAX762, but drive external power MOSFETs. For stepping up to 5V, see the MAX756/ MAX757 and MAX856-MAX859 data sheets. MAX761ESA Features • High Efficiency for a Wide Range of Load Currents• 12V/150mA Flash Memory Programming Supply• 110µA Max Supply Current• 5µA Max Shutdown Supply Current• 2V to 16.5V Input Voltage Range• 12V (MAX761), 15V (MAX762) or Adjustable Output• Current-Limited PFM Control Scheme• 300kHz Switching Frequency• Internal, 1A, N-Channel Power FET• LBI/LBO Low-Battery Comparator MAX761ESA Applications • Flash Memory Programming• PCMCIA Cards• Battery-Powered Applications• High-Efficiency DC-DC Converters


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