ISL8088 Просмотр технического описания (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)

500ns/DIV

LX1 2V/DIV

500ns/DIV

LX2 2V/DIV

VOUT1 RIPPLE 20mV/DIV

IL1 0.5A/DIV

FIGURE 14. STEADY STATE OPERATION AT NO LOAD CHANNEL 1

(PWM)

VOUT2 RIPPLE 20mV/DIV

IL2 0.5A/DIV

FIGURE 15. STEADY STATE OPERATION AT NO LOAD CHANNEL 2

(PWM)

500ns/DIV

LX1 2V/DIV

500ns/DIV

LX2 2V/DIV

VOUT1 RIPPLE 20mV/DIV

IL1 0.5A/DIV

FIGURE 16. STEADY STATE OPERATION AT NO LOAD CHANNEL 1

(PFM)

VOUT2 RIPPLE 20mV/DIV

IL2 0.5A/DIV

FIGURE 17. STEADY STATE OPERATION AT NO LOAD CHANNEL 2

(PFM)

LX1 2V/DIV

VOUT1 RIPPLE 20mV/DIV

LX2 2V/DIV

VOUT2 RIPPLE 20mV/DIV

500ns/DIV

IL1 0.5A/DIV

FIGURE 18. STEADY STATE OPERATION WITH FULL LOAD CHANNEL 1

500ns/DIV

IL2 0.5A/DIV

FIGURE 19. STEADY STATE OPERATION WITH FULL LOAD CHANNEL 2

FN6858 Rev 2.00

May 26, 2011

Page 8 of 18

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