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RT9300A - Low Dropout Current Source

General Description

The RT9300A/B low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs.

The RT9300A/B uses an internal resistor to set the bias current for four LEDs, which are matched to 5%.

Key Features

  • z Low 60/45mV Dropout at 20/15mA z 5% LED Current Matching z Simple LED Brightness Control z 2.5V to 5.5V Supply Voltage Range z Thermal Shutdown Protection z RoHS Compliant and 100% Lead (Pb)-Free.

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Datasheet Details

Part number RT9300A
Manufacturer Richtek
File Size 114.91 KB
Description Low Dropout Current Source
Datasheet download datasheet RT9300A Datasheet

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RT9300A/B Tiny Package, Low Dropout Current Source General Description The RT9300A/B low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. The RT9300A/B uses an internal resistor to set the bias current for four LEDs, which are matched to 5%. The RT9300A/B'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 RT9300A/B requires only a 60/45mV dropout voltage at a 20/15mA load on each output to match the LED brightness.