ISL8088(2009) データシートの表示（PDF） - Intersil

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ISL8088
(Rev.:2009)

Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Intersil 

ISL8088

Typical Operating Performance

1.56

1.55

1.54

5 VIN PFM MODE

3.3V VIN PFM

1.53

1.52

1.51

3.3V VIN PWM

5VIN PWM MODE

1.50

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

OUTPUT LOAD (A)

FIGURE 7. VOUT REGULATION vs LOAD 2.25MHz

1.5VOUT

(Unless otherwise noted) operating conditions are:

TA = +25°C, VIN = 2.75V to 5.5V, EN = VIN, L1 = L2 = 2.2µH,

C1 = 10µF, C2 = C4 = 10µF, VOUT1 = 2.5V, VOUT2 = 1.8V,

IOUT1 = IOUT2 = 0A to 800mA. (Continued)

1.84

1.83

5 VIN PFM MODE

1.82

1.81

3.3V VIN PFM

5VIN PWM MODE

1.80

1.79

3.3V VIN PWM

1.78

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

OUTPUT LOAD (A)

FIGURE 8. VOUT REGULATION vs LOAD 2.25MHz

1.8VOUT

2.55

2.54

2.53

2.52

2.51

5V VIN PFM

3.3V VIN PFM

3.3V VIN PWM 5V VIN PWM

2.50

2.49

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

OUTPUT LOAD (A)

FIGURE 9. VOUT REGULATION vs LOAD 2.25MHz

2.5VOUT

3.42

3.40

3.38

3.36

3.34

5V VIN PFM

5V VIN PWM

3.32

3.30

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

OUTPUT LOAD (A)

FIGURE 10. VOUT REGULATION vs LOAD 2.25MHz

3.3VOUT

1.83

1.82

1.81

0A LOAD PWM

1.80

1.79

1.78

0.8A LOAD PWM

0.4A LOAD PWM

1.77

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

INPUT VOLTAGE (V)

FIGURE 11. OUTPUT VOLTAGE REGULATION vs VIN

1.8VOUT PWM MODE

1.83

1.82

1.81

0A LOAD

0.4A LOAD

1.80

1.79

1.78

0.8A LOAD

1.77

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

INPUT VOLTAGE (V)

FIGURE 12. OUTPUT VOLTAGE REGULATION vs VIN

1.8VOUT PFM MODE

7

FN6858.0

September 21, 2009

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