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Fabricante

8502AIRZ

2A Synchronous Buck Regulator with Integrated MOSFETs

Intersil 

ISL8502A

Typical Performance Curves VIN = 12V, VOUT = 2.5V, IO = 2A, fs = 500kHz, L = 4.7µH, CIN = 20µF,

COUT = 100µF + 22µF, TA = +25° C, unless otherwise noted. (Continued)

0P.H5µAsSE1

5V/DIV

PHASE2

5V/DIV

VOUT1 RIPPLE

20mV/DIV

VOUT2 RIPPLE

20mV/DIV

FIGURE 23. MASTER TO SLAVE OPERATION

PHASE1

5V/DIV

IL1

0.5A/DIV

VOUT1 RIPPLE

20mV/DIV

SYNCH1

2V/DIV

FIGURE 24. MASTER OPERATION AT NO LOAD

PHASE1

5V/DIV

VOUT1 RIPPLE

20mV/DIV

IL1

1A/DIV

SYNCH1

5V/DIV

FIGURE 25. MASTER OPERATION WITH FULL LOAD

PHASE1

10V/DIV

IL1

1A/DIV

VOUT1 RIPPLE

20mV/DIV

SYNCH1

5V/DIV

FIGURE 26. MASTER OPERATION WITH NEGATIVE LOAD

EN1

5V/DIV

VOUT1

1V/DIV

IL1

2A/DIV

SS1

2V/DIV

FIGURE 27. SOFT-START AT NO LOAD

11

EN1

5V/DIV

2V PRE-BIASED

IL1

1A/DIV

VOUT1

0.5V/DIV

SS1

2V/DIV

FIGURE 28. START-UP WITH PRE-BIASED

FN7940.0

October 21, 2011

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