RT9284A Datasheet, PDF(1/14 Page) Richtek Technology Corporation – Tiny Package, High Performance, Constant Current Switching Regulator for White LED

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RT9284A Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – Tiny Package, High Performance, Constant Current Switching Regulator for White LED

RT9284A/B

Tiny Package, High Performance, Constant Current

Switching Regulator for White LED

General Description

Features

The RT9284A/B is a compact, high efficient and high

integration LED driver. Internal 22V MOSFET can support

2 to 5 White LEDs for backlighting and camera flashing.

Highly integration and internal compensation network

minimizes as 5 external component counts. Optimized

operation frequency can meet the requirement of small

LC filters value and low operation current with high

efficiency. Internal soft start function can reduce the inrush

current. Tiny package type of TSOT-23-5 and TSOT-23-6

packages provide the best solution for PCB space saving

and total BOM cost.

z VIN Operating Range : 2.7V to 5.5V

z Maximum Output Voltage up to 20V

z Dimming with Zero-inrush and Wide Frequency

Range of 100 to 100kHz

z Over Voltage Protection

z Output Current up to 100mA at VOUT = 12V.

z Zero Shutdown Supply Current

z Minimize the External Component

z Small LC Filter

z Internal Soft Start

z RoHS Compliant and 100% Lead (Pb)-Free

Ordering Information

RT9284 (- )

Package Type

J5 : TSOT-23-5

J6 : TSOT-23-6

Applications

z Camera Flash White LED

z Mobile Phone, Smart Phone LED Backlight

z PDA LED Backlight

z Digital Still Camera

Operating Temperature Range

z Camcorder

P : Pb Free with Commercial Standard

G : Green (Halogen Free with

Commercial Standard)

Pin Configurations

OVP Voltage

15 : 15V

20 : 20V

TOP VIEW

VDD

FB Voltage

A : 1.235V

B : 0.25V

12 3

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.

LX GND FB

TSOT-23-5

VDD OVP EN

654

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area, otherwise visit our website for detail.

123

LX GND FB

TSOT-23-6

Note : There is no pin1 indicator on top mark for TSOT-23-6

type, and pin 1 will be lower left pin when reading top mark

from left to right.

DS9284A/B-05 August 2007

www.richtek.com

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