PT4404
Low Dropout Adjustable 350mA Current Regulator
FEATURES
Supply voltage range: 2.7V-5.5V
Current sink set by external resistor
110mV Low Dropout voltage for 350mA
current output
100uA quiescent current
0.1uA shutdown current
Built-in thermal shutdown protection
SOT-89-5 Package
GENERAL DESCRIPTION
PT4404 is a low dropout current regulator with
an adjustable constant sink current sink of up to
350mA. The dropout voltage at 350mA is
typically 110mVwith the quiescent current of only
100µA. The enable pin is used to shutdown the
chip or control the LED brightness with a PWM
signal.
The built-in thermal shutdown protection shuts
down the chip when the chip temperature
exceeds 150
o
C. An external resistor can be used
to set the output current level. The PT4404 is
packaged with SOT-89-5.
APPLICATION
Power LED Driver
Constant current sink
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PT4404
TYPICAL APPLICATIONS
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