General Description
The AP3601 low-dropout bias supply for white LEDs is
a high-performance alternative to the simple ballastGeneral Description
The AP3601 low-dropout bias supply for white LEDs is
a high-performance alternative to the simple ballast
resistors used in conventional white LED designs. The
AP3601 uses an internal resistor to set the bias current
for 4 LEDs, which are matched to 4%. The AP3601's
advantages over ballast resistors include much lower bias
variation with supply voltage variation, significantly
lower dropout voltage, and in some applications,
significantly improved efficiency. The AP3601 requires
only a 60mV dropout voltage at a 20mA load on each
output to match the LED brightness.
Applications
? Next-Generation Wireless Handsets
? PDAs, Palmtops, and Handy Terminals
? Digital Cameras, Camcorders
? Battery-Powered Equipment
Features
? Low 60mV Dropout at 20mA
? 4% LED Current MatchingGeneral Description
The AP3601 low-dropout bias supply for white LEDs is
a high-performance alternative to the simple ballast
resistors used in conventional white LED designs. The
AP3601 uses an internal resistor to set the bias current
for 4 LEDs, which are matched to 4%. The AP3601's
advantages over ballast resistors include much lower bias
variation with supply voltage variation, significantly
lower dropout voltage, and in some applications,
significantly improved efficiency. The AP3601 requires
only a 60mV dropout voltage at a 20mA load on each
output to match the LED brightness.
Applications
? Next-Generation Wireless Handsets
? PDAs, Palmtops, and Handy Terminals
? Digital Cameras, Camcorders
? Battery-Powered Equipment
Features
? Low 60mV Dropout at 20mA
? 4% LED Current Matching
? Simple LED Brightness Control
? 2.7V to 5.5V Supply Voltage Range
? Thermal Shutdown Protection
? RoHS Compliant and 100% Lead (Pb)- Free
Package
? SOT23-6
Pin Assignment
Note : There is no pin1 indicator on top mark for SOT-23-6
type, and pin 1 will be lower left pin when reading top mark
? Simple LED Brightness Control
? 2.7V to 5.5V Supply Voltage Range
? Thermal Shutdown Protection
? RoHS Compliant and 100% Lead (Pb)- Free
Package
? SOT23-6
Pin Assignment
Note : There is no pin1 indicator on top mark for SOT-23-6
type, and pin 1 will be lower left pin when reading top mark
resistors used in conventional white LED designs. The
AP3601 uses an internal resistor to set the bias current
for 4 LEDs, which are matched to 4%. The AP3601's
advantages over ballast resistors include much lower bias
variation with supply voltage variation, significantly
lower dropout voltage, and in some applications,
significantly improved efficiency. The AP3601 requires
only a 60mV dropout voltage at a 20mA load on each
output to match the LED brightness.
Applications
? Next-Generation Wireless Handsets
? PDAs, Palmtops, and Handy Terminals
? Digital Cameras, Camcorders
? Battery-Powered Equipment
FeaturesGeneral Description
The AP3601 low-dropout bias supply for white LEDs is
a high-performance alternative to the simple ballast
resistors used in conventional white LED designs. The
AP3601 uses an internal resistor to set the bias current
for 4 LEDs, which are matched to 4%. The AP3601's
advantages over ballast resistors include much lower bias
variation with supply voltage variation, significantly
lower dropout voltage, and in some applications,
significantly improved efficiency. The AP3601 requires
only a 60mV dropout voltage at a 20mA load on each
output to match the LED brightness.
Applications
? Next-Generation Wireless Handsets
? PDAs, Palmtops, and Handy Terminals
? Digital Cameras, Camcorders
? Battery-Powered Equipment
Features
? Low 60mV Dropout at 20mA
? 4% LED Current Matching
? Simple LED Brightness Control
? 2.7V to 5.5V Supply Voltage Range
? Thermal Shutdown Protection
? RoHS Compliant and 100% Lead (Pb)- Free
Package
? SOT23-6
Pin Assignment
Note : There is no pin1 indicator on top mark for SOT-23-6
type, and pin 1 will be lower left pin when reading top mark
? Low 60mV Dropout at 20mA
? 4% LED Current Matching
? Simple LED Brightness Control
? 2.7V to 5.5V Supply Voltage Range
? Thermal Shutdown Protection
? RoHS Compliant and 100% Lead (Pb)- Free
Package
? SOT23-6
Pin Assignment
Note : There is no pin1 indicator on top mark for SOT-23-6
type, and pin 1 will be lower left pin when reading top mark