ISL8022 查看數據表（PDF） - Intersil

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ISL8022

Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Intersil 

ISL8022

Typical Operating Performance (Unless otherwise noted) operating conditions are:

TA = +25°C, VVIN = 2.8V to 5.5V, EN = VIN, L1 = L2 = 1.2µH, C1 = 10µF, C2 = C4 = 22µF, IOUT1 = 0A to 2A,

IOUT2 = 0A to 1.7A. (Continued)

EN1 2V/DIV

VOUT1 1V/DIV

IL1 0.5A/DIV

PG 5V/DIV

TB = 500µs/DIV

FIGURE 25. SOFT-START AT NO LOAD CHANNEL 1

(PFM)

EN2 2V/DIV

VOUT2 1V/DIV

IL2 0.5A/DIV

PG 5V/DIV

TB = 500µs/DIV

FIGURE 26. SOFT-START AT NO LOAD CHANNEL 2

(PFM)

EN1 2V/DIV

VOUT1 1V/DIV

IL1 1A/DIV

PG 5V/DIV

TB = 500µs/DIV

FIGURE 27. SOFT-START AT FULL LOAD CHANNEL 1

EN2 2V/DIV

VOUT2 1V/DIV

IL2 1A/DIV

PG 5V/DIV

TB = 500µs/DIV

FIGURE 28. SOFT-START AT FULL LOAD CHANNEL 2

EN1 2V/DIV

VOUT1 1V/DIV

EN2 2V/DIV

VOUT2 1V/DIV

IL1 0.2A/DIV

PG 5V/DIV

TB = 200µs/DIV

IL2 0.2A/DIV

PG 5V/DIV

TB = 200µs/DIV

FIGURE 29. SOFT-DISCHARGE SHUTDOWN CHANNEL 1

FIGURE 30. SOFT-DISCHARGE SHUTDOWN CHANNEL 2

11

FN7650.1

August 25, 2010

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