RT9300APE datasheet(1/7 Pages) RICHTEK

Part #	RT9300APE

Description	Tiny Package, Low Dropout Current Source

PDF	7 Pages

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Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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RT9300A/B

Preliminary

1

DS9300A/B-02 March 2007

www.richtek.com

Features

Low 60/45mV Dropout at 20/15mA

3% LED Current Matching

Simple LED Brightness Control

2.5V to 5.5V Supply Voltage Range

Thermal Shutdown Protection

RoHS Compliant and 100% Lead (Pb)-Free

Applications

Next-Generation Wireless Handsets

PDAs, Palmtops, and Handy Terminals

Digital Cameras, Camcorders

Battery-Powered Equipment

Tiny Package, Low Dropout Current Source

Ordering Information

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 a internal resistor to set the bias

current for four LEDs, which are matched to 3%. 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

a 60/45mV dropout at a 20/15mA load on each output to

match the LED brightness.

(TOP VIEW)

SOT-23-6

Typical Application Circuit

LED4

GND

EN

4

23

5

6

1

LED3

LED2

LED1

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

from left to right.

Pin Configurations

Figure 1. Application circuit for backlight.

LED4

LED3

LED2

LED1

GND

EN

PWM

V

IN

6

5

43

1

2

RT9300A/B

C

0.1uF

Note :

RichTek Pb-free and Green products are :

RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

Suitable for use in SnPb or Pb-free soldering processes.

100%matte tin (Sn) plating.

RT9300A/B

Package Type

E : SOT-23-6

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

Sink Current

A : 20mA

B : 15mA

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