ISL8088 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

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ISL8088

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

Renesas Electronics 

ISL8088

Typical Operating Performance 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)

1.56

1.55

1.54

1.53

5 VIN PFM MODE

3.3V VIN PFM

1.84

1.83

1.82

1.81

5 VIN PFM MODE

3.3V VIN PFM

5VIN PWM MODE

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 8. VOUT REGULATION vs LOAD 2.25MHz 1.5VOUT

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 9. 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 10. 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 11. 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 12. 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 13. OUTPUT VOLTAGE REGULATION vs VIN 1.8VOUT PFM

MODE

FN6858 Rev 2.00

May 26, 2011

Page 7 of 18

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