ISL8022 Просмотр технического описания (PDF) - Intersil

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ISL8022

Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Intersil 

ISL8022

Typical Operating Performance (Unless otherwise noted) operating conditions are:

TA = +25°C, VVIN = 2.8V to 5.5V, EN = VIN, L1 = L2 = 1.2µH, C1 = 10µF, C2 = C4 = 22µF, IOUT1 = 0A to 2A,

IOUT2 = 0A to 1.7A. (Continued)

1.54

2.53

1.53

1.52

1.51

1.50

5VIN PFM

5VIN PWM

3.3V VIN PFM

2.52

2.51

2.50

2.49

5VIN PFM

5VIN PWM 3.3V VIN PFM

1.49

3.3V VIN PWM

1.48

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

OUTPUT LOAD (A)

FIGURE 8. VOUT REGULATION vs LOAD, 2.25MHz, 1.5V

CHANNEL2

2.48

3.3V VIN PWM

2.47

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

OUTPUT LOAD (A)

FIGURE 9. VOUT REGULATION vs LOAD, 2.25MHz, 2.5V

CHANNEL1

1.83

1.82

3.3V VIN PFM

1.81

1.80

5 VIN PFM

1.79

1.78 3.3V VIN PWM

5VIN PWM

1.77

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

OUTPUT LOAD (A)

FIGURE 10. VOUT REGULATION vs LOAD, 2.25MHz,

1.8V, CHANNEL 2

2.54

2.53

2.52

2.51

2.50

2A LOAD

0A LOAD PFM

2.49

0A LOAD PWM

1A LOAD

2.48

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5

INPUT VOLTAGE (V)

FIGURE 11. OUTPUT VOLTAGE REGULATION vs VIN

2.5V CHANNEL 1

1.83

1.82

1.81

1.80

0A LOAD PWM

0A LOAD PFM

1.79

0.8A LOAD

1.78

1.7A LOAD

1.77

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5

INPUT VOLTAGE (V)

FIGURE 12. OUTPUT VOLTAGE REGULATION vs VIN 1.8V CHANNEL 2

8

FN7650.1

August 25, 2010

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