ISL8014 查看數據表（PDF） - Renesas Electronics

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ISL8014

4A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator

Renesas Electronics 

ISL8014

Typical Operating Performance

0.25

0.20

0.15

0.10

0.05

0

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

VIN (V)

FIGURE 9. POWER DISSIPATION WITH NO LOAD vs

VIN (PFM VOUT = 1.8V)

(Unless otherwise noted, operating conditions are: TA = +25°C,

VVIN = 2.5V to 5.5V, EN = VIN, SYNCH = 0V, L = 1.5µH,

C1 = 2x22µF, C2 = 2x22µF, IOUT = 0A to 4A). (Continued)

1.24

1.23

1.22 3.3VIN-PFM

1.21

3.3VIN-PWM

1.20

1.19

1.18

1.17

5VIN-PWM

5VIN-PFM

1.16

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

OUTPUT LOAD (A)

FIGURE 10. VOUT REGULATION vs LOAD (1MHz,

VOUT = 1.2V)

1.55

1.54

1.53 3.3VIN-PFM

3.3VIN-PWM

1.52

1.51

1.50

1.49

5VIN-PWM

5VIN-PFM

1.48

1.47

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

OUTPUT LOAD (A)

FIGURE 11. VOUT REGULATION vs LOAD (1MHz,

VOUT = 1.5V)

1.83

1.82 3.3VIN-PFM

1.81

3.3VIN-PWM

1.80

1.79

1.78

1.77

1.76

5VIN-PFM

5VIN-PWM

1.75

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

OUTPUT LOAD (A)

FIGURE 12. VOUT REGULATION vs LOAD (1MHz,

VOUT = 1.8V)

2.52

2.51

3.3VIN-PFM

2.50

3.3VIN-PWM

2.49

2.48

2.47

2.46

5VIN-PWM

2.45 5VIN-PFM

2.44

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

OUTPUT LOAD (A)

FIGURE 13. VOUT REGULATION vs LOAD (1MHz,

VOUT = 2.5V)

3.36

3.35

3.34

5VIN-PWM

4.5VIN-PWM

3.33

3.32

3.31

4.5VIN-PFM

3.30 5VIN-PFM

3.29

3.28

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

OUTPUT LOAD (A)

FIGURE 14. VOUT REGULATION vs LOAD (1MHz,

VOUT = 3.3V)

FN6576 Rev 4.00

November 23, 2009

Page 7 of 17

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