MAX748AEWE+

MAXIM INTEGRATED PRODUCTS  MAX748AEWE+  芯片, 直流/直流转换器, 3.3V, 降压, PWM

The is a 3.3V, step-down, current-mode PWM DC-DC converter in 16 pin WSOIC package. It accepts inputs from 3.3V to 16V and delivers up to 500mA with typical efficiencies of 85% to 90%. The pulse width modulation PWM current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy to be ±5% over line, load and temperature variations. Fixed frequency switching allows easy filtering of output ripple and noise as well as use of small external components. A 22µH inductor works in most applications so no magnetic design is necessary. It features cycle by cycle current limiting, overcurrent limiting, undervoltage lockout and programmable soft start protection. It is used in 5V to 3.3V converters and computer peripherals.

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Oscillator frequency range from 159KHz to 212.5KHz

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Operating temperature range from -40°C to 85°C

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Quiescent current is 1.7mA

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Shutdown supply current is 0.2µA

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Typical line regulation of 0.13%/V

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Typical load regulation of 0.001%/mA

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Maximum oscillator frequency is 212.5KHz

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Reference drift is 50ppm/°C at TA = TMIN to TMAX