ISL8088(2009) 查看數據表（PDF） - Intersil

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ISL8088
(Rev.:2009)

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

Intersil 

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)

VOUT1 RIPPLE 20mV/DIV

VOUT2 RIPPLE 20mV/DIV

IL1 0.5A/DIV

IL2 0.5A/DIV

50µs/DIV

FIGURE 19. LOAD TRANSIENT CHANNEL 1 (PWM)

50µs/DIV

FIGURE 20. LOAD TRANSIENT CHANNEL 2 (PWM)

LX1 2V/DIV

50µs/DIV

VOUT1 RIPPLE 50mV/DIV

IL1 0.5A/DIV

FIGURE 21. LOAD TRANSIENT CHANNEL 1 (PFM)

LX2 2V/DIV

50µs/DIV

VOUT2 RIPPLE 50mV/DIV

IL2 0.5A/DIV

FIGURE 22. LOAD TRANSIENT CHANNEL 2 (PFM)

50µs/DIV

EN1 2V/DIV

50µs/DIV

EN2 2V/DIV

VOUT2 0.5V/DIV

VOUT1 1V/DIV

IL1 0.5A/DIV

PG 5V/DIV

FIGURE 23. SOFT-START WITH NO LOAD CHANNEL 1

(PWM)

IL2 0.5A/DIV

PG 5V/DIV

FIGURE 24. SOFT-START WITH NO LOAD CHANNEL 2

(PWM)

9

FN6858.0

September 21, 2009

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