EL7554 データシートの表示（PDF） - Renesas Electronics

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EL7554

Monolithic 4A DC/DC Step-Down Regulator

Renesas Electronics 

EL7554

Waveforms

VIN = VD = 3.3V, VO = 1.8V, IO = 4A, L = 2.2µH, CIN = 2x10µF, COUT = 47µF, COSC = 220pF, TA = +25°C unless otherwise noted.

VIN (2V/DIV)

IIN (1A/DIV)

VO (1V/DIV)

PG (2V/DIV)

0.5ms/DIV

FIGURE 12. START-UP

VIN (100mV/DIV)

VLX (2V/DIV)

VO (10mV/DIV)

1µs/DIV

FIGURE 13. STEADY-STATE OPERATION

VEN

IIN (2A/DIV)

VO (2V/DIV)

50µs/DIV

FIGURE 14. SHUT-DOWN

3A

1.0A

IO

VO (100mV/DIV)

100µs/DIV

FIGURE 15. TRANSIENT RESPONSE

TM

SEL

VO (200mV/DIV)

1ms/DIV

FIGURE 16. VOLTAGE MARGINING

FN7360 Rev 5.00

November 5, 2007

PG

VO (2V/DIV)

VLX (5V/DIV)

0.5ms/DIV

FIGURE 17. OVER-VOLTAGE SHUT-DOWN

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