ISL8088(2009) データシートの表示（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)

PHASE1 5V/DIV

LX1 5V/DIV

IL1 0.5A/DIV

VOUT1 1V/DIV

VOUT1 1V/DIV

PG 5V/DIV

10µs/DIV

FIGURE 37. OUTPUT SHORT CIRCUIT CHANNEL 1

IL1 0.5A/DIV

500µs/DIV

PG 5V/DIV

FIGURE 38. OUTPUT SHORT CIRCUIT RECOVERY

CHANNEL 1

10µs/DIV

PHASE2 5V/DIV

IL2 0.5A/DIV

VOUT2 1V/DIV

PG 5V/DIV

FIGURE 39. OUTPUT SHORT CIRCUIT CHANNEL 2

500µs/DIV

LX2 5V/DIV

VOUT2 0.5V/DIV

IL2 0.5A/DIV

PG 5V/DIV

FIGURE 40. OUTPUT SHORT CIRCUIT RECOVERY

CHANNEL 2

2.4

VIN 6V IOUT1 OC

VIN 6V IOUT2 OC

2.0

1.6

1.2

0.8 VIN 3.5V IOUT2 OC

0.4

VIN 3.5V IOUT1 OC

0

-50 -30 -10 10

20

50

70

90 110

TEMPERATURE (°C)

FIGURE 41. OUTPUT CURRENT LIMIT vs TEMPERATURE

12

FN6858.0

September 21, 2009

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