ISL8014 데이터 시트보기 (PDF) - Renesas Electronics

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ISL8014

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

Renesas Electronics 

ISL8014

Typical Operating Performance

1.830

1.820

1.810

4A 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 4A). (Continued)

1.830

1.820

1.810

1.800

4A 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

LX 2V/DIV

IL 0.5A/DIV

VOUT RIPPLE 20mV/DIV

FIGURE 17. STEADY STATE OPERATION AT NO LOAD

(PWM)

FIGURE 18. STEADY STATE OPERATION AT NO LOAD

(PFM)

LX 2V/DIV

IL 2A/DIV

VOUT RIPPLE 20mV/DIV

FIGURE 19. STEADY STATE OPERATION WITH FULL

LOAD

FN6576 Rev 4.00

November 23, 2009

LX 2V/DIV

VOUT RIPPLE 50mV/DIV

IL 1A/DIV

FIGURE 20. MODE TRANSITION CCM TO DCM

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