ISL8502 데이터 시트보기 (PDF) - Intersil

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ISL8502

2A Synchronous Buck Regulator with Integrated MOSFETs

Intersil 

ISL8502

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)

5.2

5.1

5.0

4.9

4.8

4.7

4.6

4.5 0

50

100

150

200

250 300

I VCC (mA)

FIGURE 19. VCC LOAD REGULATION

5.5

5.4

NO LOAD

5.3

5.2

5.1

5.0

4.9

100mA LOAD

4.8

4.7

4.6

4.5

3

4 5 6 7 8 9 10 11 12 13

VIN (V)

FIGURE 20. VCC REGULATION vs VIN

14 15

0P.H5AµsSE1

5V/DIV

PHASE2

5V/DIV

VOUT1 RIPPLE

20mV/DIV

VOUT2 RIPPLE

20mV/DIV

FIGURE 21. MASTER TO SLAVE OPERATION

PHASE1

5V/DIV

IL1

0.5A/DIV

VOUT1 RIPPLE

20mV/DIV

SYNCH1

2V/DIV

FIGURE 22. MASTER OPERATION AT NO LOAD

PHASE1

5V/DIV

VOUT1 RIPPLE

20mV/DIV

IL1

1A/DIV

SYNCH1

5V/DIV

FIGURE 23. MASTER OPERATION WITH FULL LOAD

PHASE1

10V/DIV

IL1

1A/DIV

VOUT1 RIPPLE

20mV/DIV

SYNCH1

5V/DIV

FIGURE 24. MASTER OPERATION WITH NEGATIVE LOAD

10

FN6389.2

June 29, 2010

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