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)

PG 1V/DIV

PG 1V/DIV

IL2 0.5A/DIV

VOUT2 2V/DIV

LX2 2V/DIV

IL2 0.5A/DIV

VOUT2 2V/DIV

LX2 2V/DIV

TB = 10µs/DIV

TB = 1µs/DIV

FIGURE 37. VOUT2 HARD SHORT TO VIN NEGATIVE

CURRENT WAVEFORMS AT HIGH LINE

CHANNEL 2

FIGURE 38. RECOVERY FROM HARD SHORT NEGATIVE

CURRENT WAVEFORMS VOUT2 CHANNEL 2

LX1 5V/DIV

VOUT1 2V/DIV

IL1 2A/DIV

PG 5V/DIV

TB = 5µs/DIV

FIGURE 39. OUTPUT SHORT CIRCUIT CHANNEL 1

LX1 5V/DIV

VOUT1 2V/DIV

IL1 2A/DIV

PG 5V/DIV

TB = 1ms/DIV

FIGURE 40. OUTPUT SHORT CIRCUIT RECOVERY

CHANNEL 1

LX2 5V/DIV

LX2 5V/DIV

VOUT2 1V/DIV

IL2 2A/DIV

PG 5V/DIV

TB = 5µs/DIV

FIGURE 41. OUTPUT SHORT CIRCUIT CHANNEL 2

VOUT2 1V/DIV

IL2 2A/DIV

PG 5V/DIV

TB = 1ms/DIV

FIGURE 42. OUTPUT SHORT CIRCUIT RECOVERY

CHANNEL 2

13

FN7650.1

August 25, 2010

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