ISL85001 Ver la hoja de datos (PDF) - Intersil

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ISL85001

1A Standard Buck PWM Regulator

Intersil 

ISL85001

Typical Performance Curves Unless otherwise noted, operating conditions are: TA = +25°C, VIN = 12V, EN = VDD, L = 22µH,

C9 = 10µF, C11 = 47µF, IOUT = 0A to 1A. See “VIN (Pins 11, 12)” on page 6. (Continued)

1.814

2.506

1.813

1.812

1.811

25VIN

12VIN

2.505

2.504

2.503

25VIN

12VIN

1.810

2.502

1.809

2.501

1.808

1.807

5VIN

1.806

0.0

0.2

0.4

0.6

0.8

1.0

OUTPUT LOAD (A)

FIGURE 8. VOUT REGULATION vs LOAD, 500kHz, 1.8VOUT

2.500

2.499

5VIN

2.498

0.0

0.2

0.4

0.6

0.8

1.0

OUTPUT LOAD (A)

FIGURE 9. VOUT REGULATION vs LOAD, 500kHz, 2.5VOUT

3.330

3.328

3.326

25VIN

12VIN

3.324

3.322

3.320

3.318

7VIN

3.316

3.3140.0

0.2

0.4

0.6

0.8

1.0

OUTPUT LOAD (A)

FIGURE 10. VOUT REGULATION vs LOAD, 500kHz, 3.3VOUT

4.99

4.98

4.97

4.96

25VIN

4.95

4.94

7VIN

4.93

4.92

12VIN

4.910.1

0.3

0.5

0.7

0.9

OUTPUT LOAD (A)

FIGURE 11. VOUT REGULATION vs LOAD, 500kHz, 5VOUT

PHASE 5V/DIV

PHASE 5V/DIV

VOUT RIPPLE

20mV/DIV

IL 0.1A/DIV

FIGURE 12. STEADY STATE OPERATION AT NO LOAD

(5µs/DIV)

VOUT RIPPLE

20mV/DIV

IL 0.5A/DIV

FIGURE 13. STEADY STATE OPERATION AT FULL LOAD

(1µs/DIV)

8

FN6769.1

March 17, 2009

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