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RT9300B - Low Dropout Current Source

Download the RT9300B datasheet PDF. This datasheet also covers the RT9300A variant, as both devices belong to the same low dropout current source family and are provided as variant models within a single manufacturer datasheet.

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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT9300A_Richtek.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number RT9300B
Manufacturer Richtek
File Size 114.91 KB
Description Low Dropout Current Source
Datasheet download datasheet RT9300B Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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.