MAX15022ATI+

MAXIM INTEGRATED PRODUCTS  MAX15022ATI+  直流-直流开关同步降压稳压器, 可调, 2.5V-5.5V输入, 0.3V-5V/4A输出, 4000 kHz, TQFN-28

The is a dual step-down DC to DC regulator with dual LDO controllers in 28 pin TQFN package. This synchronous pulse width modulated PWM, step-down DC to DC regulator operates from 2.5V to 5.5V and each output can be adjusted from 0.6V to input supply VAVIN. The MAX15022 delivers up to 4A regulator 1 and 2A regulator 2 of output current with two LDO controllers that can be used to drive two external PNP transistors to provide two additional outputs. This device offers ability to adjust switching frequency from 500KHz to 4MHz and provides capability of optimizing design in terms of size and performance. The MAX15022 utilizes voltage mode control scheme with external compensation to provide good noise immunity and maximum flexibility in selecting inductor values and capacitor types. It powers up glitchfree into a pre-biased output during sequencing. It is used in RFID reader cards, power-over-Ethernet PoE IP phones, multivoltage supplies and networking/telecom.

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Operating supply current of 3.5mA and shutdown supply current of 30µA

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Operating temperature range from -40°C to 125°C

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Internal undervoltage lockout with hysteresis

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180° out of phase operation and lossless, cycle by cycle current sensing

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Ability to track coincident or ratiometric or sequence during power-up and power-down operation

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External compensation for maximum flexibility

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Digital soft-start and soft stop for tracking applications

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Sequencing or coincident/ratiometric tracking

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Thermal shutdown and hicc-up mode short circuit protection

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100% maximum duty cycle