ISL8013 Ver la hoja de datos (PDF) - Renesas Electronics

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ISL8013

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

Renesas Electronics 

ISL8013

Typical Operating Performance

1.830

1.820

1.810

3A LOAD PWM

0A LOAD PWM

1.800

1.790

1.780

1.770

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 )

(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

1.820

1.810

1.800

3A LOAD

0A LOAD

1.790

1.780

1.770

1.760

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

LX 2V/DIV

IL 1A/DIV

VOUT RIPPLE 20mV/DIV

FIGURE 19. STEADY STATE OPERATION WITH FULL

LOAD

FN6309 Rev 3.00

November 23, 2009

VOUT RIPPLE 50mV/DIV

IL 1A/DIV

FIGURE 20. MODE TRANSITION CCM TO DCM

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