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5-Lead SOT23 Package
Description
The FAN5333A/FAN5333B is a general purpose LED driver that
features 鏗亁ed frequency mode operation and an integrated FET
switch. The device鈥檚 high output power makes it suitable to drive
鏗俛sh LEDs in serial connections. This device is designed to
operate at high switching frequencies in order to minimize
switching noise measured at the battery terminal of hand-held
communications equipment. Quiescent current in both normal
and shutdown mode is designed to be minimal in order to
extend battery life. Normal or shutdown mode can be selected
by a logic level shutdown circuitry.
The low ON-resistance of the internal N-channel switch ensures
high ef鏗乧iency and low power dissipation. A cycle-by-cycle cur-
rent limit circuit keeps the peak current of the switch below a
typical value of 1.5A. The FAN5333A/FAN5333B is available in
a 5-lead SOT23 package.
Applications
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Cell Phones
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PDAs
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Handheld Equipment
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Display Bias
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LED Bias
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Flash LED
Typical Application
V
IN
4.7碌F
to
10碌F
C
IN
L
6.8碌H
to 10碌H
0.1碌F
to
2.2碌F
5
V
IN
SW
1
BAT54
C
OUT
V
OUT
I
LED
I
LED1
I
LED2
FAN5333
FB
3
ON
OFF
4
SHDN
GND
2
R
R1
R2
Figure 1. Typical Application Diagram
漏2005 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com
FAN5333A/FAN5333B Rev. 1.0.1
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