MAX1971EEE+T

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MAX1971EEE+T is a member of DC/DC switching regulators, which are typically used to provide a power conversion from one voltage level to another on a printed circuit board. These types of regulators are employed in applications involving microprocessor and digital signal processing cores, graphics, power amplifiers, and other applications where power integrity is essential.The MAX1971EEE+T is a high performance step-down switching regulator designed for battery-supplied portable applications such as cellular telephones, notebook computers, and PDAs. It features a wide 4.5V to 35V input voltage range, a programmable output voltage, and low idle current (<50µA). It offers very high efficiency and very good transient response.The MAX1971EEE+T has an integrated control and bias circuit which requires few external components. The voltage range is controlled using a resistive divider (relative to an internal voltage reference) that determines the output voltage level. Additionally, an external Schottky diode clamp is used for maximum output voltage protection.It is capable of operating in quasi fixed-frequency mode, allowing the use of small, low profile components. The switching frequency is typically set at 250kHz ± 10%, but can be adjusted with an external resistor to achieve the desired operating frequency.The circuit is designed to switch into low user-selected frequencies (100kHz to 500kHz) to extend battery life under light load conditions as well as to reduce the amount of ripple and noise in the system. The output voltage is set with an external divide-by-two resistive divider, and the output voltage is trimmed with an internal voltage reference.The MAX1971EEE+T can be used in a wide variety of applications requiring DC-DC conversion of battery-supplied voltages. Portable applications such as cellular telephones, PDA’s, laptop computers, portable instrumentation, test and measurement systems and handheld medical instruments are all possible applications for this high performance device.Its high speed switching capability enables it to achieve very high efficiencies at light loads while still providing good responsiveness. Its small size makes it a good choice for applications where space is at a premium. It also features very low diode losses, low switching noise, and high output current capability.Overall, the MAX1971EEE+T is a high performance, cost effective, low component count DC-DC switching regulator that is ideal for a wide range of portable applications, providing power conversion from a variety of battery-supplied voltages.

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