Rainbow-electronics MAX767 Manual de usuario

________________General DescriptionThe MAX767 is a high-efficiency, synchronous buckcontroller IC dedicated to converting a fixed 5V supplyinto a tigh

MAX767Gate-Driver Boost SupplyGate-drive voltage for the high-side N-channel switch isgenerated with the flying-capacitor boost circuit shownin Figure

Oscillator FrequencyThe SYNC input controls the oscillator frequency.Connecting SYNC to GND or to VCCselects 200kHzoperation; connecting it to REF sel

MAX767Place R1 as close as possible to the MAX767, prefer-ably less than 10mm. Run the traces at minimum spac-ing from one another. If they are longer

RC Filter for VCCR2 and C4 form a lowpass filter to remove switchingnoise from the VCCinput to the MAX767. C4 must havefairly low ESR (<5Ω). Switch

MAX767Proper circuit operation requires that the short-circuitcurrent be at least ILOADx (1 + LIR / 2). However, thestandard application circuits are

Capacitor ESR LossesPDCAP= capacitor ESR loss = IRMS2x ESRwhere IRMS= RMS AC input current, approximatelyILOAD/ 2.Note that losses in the output filte

MAX7675V-to-3.3V, Synchronous, Step-DownPower-Supply Controller16 ____________________________________________________________________________________

MAX7675V-to-3.3V, Synchronous, Step-Down Power-Supply Controller______________________________________________________________________________________

MAX7675V-to-3.3V, Synchronous, Step-DownPower-Supply Controller18 ____________________________________________________________________________________

MAX7675V-to-3.3V, Synchronous, Step-Down Power-Supply Controller______________________________________________________________________________________

MAX7675V-to-3.3V, Synchronous, Step-DownPower-Supply Controller2 _____________________________________________________________________________________

MAX7675V-to-3.3V, Synchronous, Step-Down Power-Supply Controller______________________________________________________________________________________

MAX7675V-to-3.3V, Synchronous, Step-DownPower-Supply Controller4 _____________________________________________________________________________________

MAX7675V-to-3.3V, Synchronous, Step-Down Power-Supply Controller______________________________________________________________________________________

MAX767_____Standard Application CircuitsThis data sheet shows five predesigned circuits withoutput current capabilities from 1.5A to 10A. Manyusers wi

MAX7675V-to-3.3V, Synchronous, Step-Down Power-Supply Controller______________________________________________________________________________________

MAX767The main gain block is an open-loop comparator thatsums four signals: output voltage error signal, current-sense signal, slope-compensation ramp

MAX7675V-to-3.3V, Synchronous, Step-Down Power-Supply Controller______________________________________________________________________________________