ISL8088 查看數據表（PDF） - Renesas Electronics

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ISL8088

Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Renesas Electronics 

ISL8088

Typical Operating Performance Unless otherwise noted, operating conditions are: TA = +25°C, VIN = 2.75V to 5.5V,

EN = VIN, L1 = L2 = 2.2µH, C1 = 10µF, C2 = C4 = 10µF, VOUT1 = 2.5V, VOUT2 = 1.8V, IOUT1 = IOUT2 = 0A to 800mA. (Continued)

500µs/DIV

EN1 2V/DIV

VOUT1 1V/DIV

500µs/DIV

EN2 2V/DIV

VOUT2 0.5V/DIV

IILL00.5.A5/AD/IVDIV

PG 5V/DIV

FIGURE 26. SOFT-START AT NO LOAD CHANNEL 1 (PFM)

IL2 0.5A/DIV

PG 5V/DIV

FIGURE 27. SOFT-START AT NO LOAD CHANNEL 2 (PFM)

500µs/DIV

EN1 2V/DIV

VOUT1 1V/DIV

IL1 0.5A/DIV

PG 5V/DIV

FIGURE 28. SOFT-START AT FULL LOAD CHANNEL 1

500µs/DIV

EN2 2V/DIV

VOUT2 0.5V/DIV

IL2 0.5A/DIV

PG 5V/DIV

FIGURE 29. SOFT-START AT FULL LOAD CHANNEL 2

1ms/DIV

EN1 5V/DIV

VOUT1 1V/DIV

IL1 0.5A/DIV

PG 5V/DIV

FIGURE 30. SOFT-DISCHARGE SHUTDOWN CHANNEL 1

EN2 5V/DIV

VOUT2 0.5V/DIV

1ms/DIV

IL2 0.5A/DIV

PG 5V/DIV

FIGURE 31. SOFT-DISCHARGE SHUTDOWN CHANNEL 2

FN6858 Rev 2.00

May 26, 2011

Page 10 of 18

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