ISL8012(2008) Просмотр технического описания (PDF) - Intersil

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ISL8012
(Rev.:2008)

2A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator

Intersil 

ISL8012

Typical Operating Performance (Unless otherwise noted, operating conditions are: TA = +25°C, VVIN = 2.5V to 5.5V, EN = VIN,

MODE = 0V, L = 1.5µH, C1 = 2x10µF, C2 = 2x10µF, IOUT = 0A to 2A). (Continued)

0.50

1.24

0.45

1.23

0.40

1.22

3.3VIN PWM

0.35

1.21

5VIN PWM

0.30

1.20

0.25

1.19

0.20

PFM

0.15

1.18 3.3VIN PFM

1.17

5VIN PFM

0.10

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

VIN (V)

FIGURE 9. POWER DISSIPATION WITH NO LOAD vs VIN

(PFM VOUT = 1.8V)

1.16

0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00

OUTPUT LOAD (A)

FIGURE 10. VOUT REGULATION vs LOAD (1MHz, VOUT = 1.2V)

1.55

1.54

1.53

3.3VIN PWM

1.52

5VIN PWM

1.51

1.50

1.49 3.3VIN PFM

1.48

5VIN PFM

1.47

0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00

OUTPUT LOAD (A)

FIGURE 11. VOUT REGULATION vs LOAD (1MHz, VOUT = 1.5V)

1.83

1.82

1.81

1.80

3.3VIN PWM

5VIN PWM

1.79

1.78 3.3VIN PFM

1.77

1.76

5VIN PFM

1.75

0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00

OUTPUT LOAD (A)

FIGURE 12. VOUT REGULATION vs LOAD (1MHz, VOUT = 1.8V)

2.59

2.57

2.55

5VIN PWM

2.53

2.51

2.49

2.47

2.45

5VIN PFM

3.3VIN PFM

3.3VIN PWM

2.43

0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00

OUTPUT LOAD (A)

FIGURE 13. VOUT REGULATION vs LOAD (1MHz, VOUT = 2.5V)

3.36

3.35

3.34

3.33

5VIN PFM

4.5VIN PWM

5VIN PWM

3.32

3.31

3.30

3.29

4.5VIN PFM

3.28

0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00

OUTPUT LOAD (A)

FIGURE 14. VOUT REGULATION vs LOAD (1MHz, VOUT = 3.3V)

8

FN6616.0

March 11, 2008

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