EL7531 查看數據表（PDF） - Intersil

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EL7531

Monolithic 1A Step-Down Regulator with Low Quiescent Current

Intersil 

EL7531

Performance Curves and Waveforms (Continued)

All waveforms are taken at VIN = 3.3V, VO = 1.8V, IO = 1A with component values shown on page 1 at room ambient temperature, unless otherwise

noted.

IO

(0.5A/DIV)

∆VO

(100mV/DIV)

IO

(0.5A/DIV)

∆VO

(100mV/DIV)

100µs/DIV

FIGURE 19. LOAD TRANSIENT RESPONSE (22mA to 1A)

50µs/DIV

FIGURE 20. PWM LOAD TRANSIENT RESPONSE (0A TO 1A)

IO

(0.5A/DIV)

∆VO

(100mV/DIV)

50µs/DIV

FIGURE 21. PWM LOAD TRANSIENT RESPONSE

(0.25A TO 0.75A)

IO=50mA

SYNC

(2V/DIV)

LX

(2V/DIV)

2µs/DIV

FIGURE 23. PFM-PWM TRANSITION TIME

7

IO=150mA

SYNC

(2V/DIV)

LX

(2V/DIV)

2µs/DIV

FIGURE 22. PFM-PWM TRANSITION TIME

3

2

1

0

-1

PFM

-2

PWM

-3

0

200 400 600 800 1000 1200

IOUT (mA)

FIGURE 24. PFM-PWM LOAD REGULATION

FN7428.9

July 13, 2006

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