ISL9104AIRUFZ-T datasheet(7/13 Pages) INTERSIL

Part #	ISL9104AIRUFZ-T

Description	500mA 4.3MHz Low IQ High Efficiency Synchronous Buck Converter

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Manufacturer	INTERSIL [Intersil Corporation]

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7 / 13 page

7

FN6829.3

July 9, 2009

Pin Descriptions

VIN

Input supply voltage. Typically connect a 4.7µF ceramic

capacitor to ground.

NC

No connect, leave it floating.

EN

Regulator enable pin. Enable the device when driven to

high. Shut down the chip and discharge output capacitor

when driven to low. Do not leave this pin floating.

SW

Switching node connection. Connect to one terminal of

inductor.

GND

Ground connection.

FB

Buck converter output feedback pin. For adjustable output

version, its typical value is 0.8V and connect it to the output

through a resistor divider for desired output voltage; for fixed

output version, directly connect this pin to the converter

output.

FIGURE 17. LOAD TRANSIENT IN PWM MODE (VIN = 3.6V,

VO = 1.5V, 200mA TO 500mA)

FIGURE 18. LOAD TRANSIENT IN PWM MODE (VIN = 3.6V,

VO = 1.5V, 500mA TO 200mA)

FIGURE 19. LOAD TRANSIENT IN PWM MODE (VIN = 3.6V,

VO = 2.5V, 200mA TO 500mA)

FIGURE 20. LOAD TRANSIENT IN PWM MODE (VIN = 3.6V,

VO = 2.5V, 500mA TO 200mA)

Typical Operating Performance (Continued)

5V/DIV

20mV/DIV

500mA/DIV

VSW

Io

VOUT (AC COUPLED)

5V/DIV

20mV/DIV

500mA/DIV

VSW

Io

VOUT

5V/DIV

20mV/DIV

500mA/DIV

VSW

Io

VOUT (AC COUPLED)

5V/DIV

20mV/DIV

500mA/DIV

VSW

Io

VOUT (AC COUPLED)

ISL9104, ISL9104A

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