ISL8022 Просмотр технического описания (PDF) - Renesas Electronics

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ISL8022

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

Renesas Electronics 

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.

100

100

3.3VOUT2

90

90

80

1.8VOUT2

70 2.5VOUT1

60

1.5VOUT2

1.2VOUT1

80

1.8VOUT2

70

2.5VOUT1

60

1.5VOUT1

1.2VOUT1

50

50

400.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

OUTPUT LOAD (A)

FIGURE 3. EFFICIENCY vs LOAD, 2.25MHz, 3.3VIN PWM

400.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

OUTPUT LOAD (A)

FIGURE 4. EFFICIENCY vs LOAD, 2.25MHz, 5VIN PWM

100

90

80

70 2.5VOUT1

1.8VOUT2

1.5VOUT1

60

1.2VOUT1

50

400.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

OUTPUT LOAD (A)

FIGURE 5. EFFICIENCY vs LOAD, 2.25MHz, 3.3VIN PFM

100

3.3VOUT2

90

80

1.8VOUT2

70

2.5VOUT1

1.5VOUT1

1.2VOUT1

60

50

400.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

OUTPUT LOAD (A)

FIGURE 6. EFFICIENCY vs LOAD, 2.25MHz, 5VIN PFM

0.90

0.75

3.3VIN PWM

0.60

0.45

0.30

5 VIN PWM

0.15

3.3VIN PFM

0.000.0

0.2

0.4

5VIN PFM

0.6 0.8 1.0

1.2

1.4

1.6

1.8

2.0

OUTPUT LOAD (A)

FIGURE 7. POWER DISSIPATION vs LOAD, 2.25MHz, 1.8V, CHANNEL

2

1.23

1.22

5 VIN PFM

1.21

3.3V VIN PFM

1.20

1.19

1.18

5VIN PWM

3.3V VIN PWM

1.170.0 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, 1.2V, CHANNEL1

FN7650 Rev 3.00

March 14, 2013

Page 7 of 18

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