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ISL9104 Datasheet(PDF) 7 Page - Intersil Corporation

Part No. ISL9104
Description  500mA 4.3MHz Low IQ High Efficiency Synchronous Buck Converter
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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ISL9104 Datasheet(HTML) 7 Page - Intersil Corporation

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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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