ISL9440 Datasheet, PDF(12/20 Page) Intersil Corporation – Triple, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

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ISL9440 Datasheet, PDF (12/20 Pages) Intersil Corporation – Triple, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

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ISL9440, ISL9440A, ISL9441

Typical Performance Curves (Continued)

(Oscilloscope Plots are Taken Using the ISL9440EVAL1Z Evaluation Board, VIN = 12V Unless Otherwise Noted.)

VIN, 1V/DIV, CH1

RST, 1V/DIV, CH3

CH3

PGOOD, 5V/DIV, CH4

CH4

CH1

500ns/DIV

FIGURE 12. PGOOD RISING TO RST RISING

VOUT1, 100mV/DIV, 0A to 6A, 1.6A/Âµs

VOUT2, 100mV/DIV, 0A to 6A, 1.6A/Âµs

VOUT3, 100mV/DIV, 0A to 2A, 1A/Âµs

VOUT4 (LDO), 100mV/DIV, 0A to 0.5A, 1A/Âµs

500Âµs/DIV

FIGURE 13. OUTPUT RIPPLE UNDER TRANSIENT LOAD

Vo1, 1V/DIV

PWM2, 5V/DIV

PWM1, 5V/DIV

Vo2, 1V/DIV

Vo3, 1V/DIV

5ms/DIV

FIGURE 14. THREE CHANNEL HARD-SHORT OCP AT THE

SAME TIME

PWM3, 5V/DIV

1Âµs/DIV

FIGURE 15. PHASE NODE PWM WAVEFORMS, VIN = 24V

FN6383.1

December 5, 2007

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