ISL8013 Просмотр технического описания (PDF) - Intersil

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ISL8013

3A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator

Intersil 

ISL8013

Typical Operating Performance (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 3A). (Continued)

1.830

1.830

1.820

1.810

1.800

3A LOAD PWM

0A LOAD PWM

1.820

1.810

1.800

3A LOAD

0A LOAD

1.790

1.790

1.780

1.780

1.770

1.770

1.760

1.760

1.750

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

INPUT VOLTAGE (V)

FIGURE 15. OUTPUT VOLTAGE REGULATION vs VIN

(PWM VOUT = 1.8 )

1.750

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

INPUT VOLTAGE (V)

FIGURE 16. OUTPUT VOLTAGE REGULATION vs VIN

(PFM VOUT = 1.8V)

LX 2V/DIV

VOUT RIPPLE 20mV/DIV

IL 0.5A/DIV

FIGURE 17. STEADY STATE OPERATION AT NO LOAD (PWM)

LX 2V/DIV

VOUT RIPPLE 20mV/DIV

IL 0.5A/DIV

FIGURE 18. STEADY STATE OPERATION AT NO LOAD (PFM)

LX 2V/DIV

IL 1A/DIV

VOUT RIPPLE 20mV/DIV

FIGURE 19. STEADY STATE OPERATION WITH FULL LOAD

9

LX 2V/DIV

VOUT RIPPLE 50mV/DIV

IL 1A/DIV

FIGURE 20. MODE TRANSITION CCM TO DCM

FN6309.1

December 27, 2007

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