EEWORLDEEWORLDEEWORLD

Part Number

Search

RT9271GE

Description
White LED Step-Up Converter in Tiny Package
File Size340KB,15 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet Compare View All

RT9271GE Overview

White LED Step-Up Converter in Tiny Package

RT9271
White LED Step-Up Converter in Tiny Package
General Description
The RT9271 is a step-up DC/DC converter specifically
designed to drive white LEDs with a constant current. The
device can drive one
to three LEDs in series from a Li-Ion
cell. Series connection of the LEDs provides
identical LED
currents resulting in uniform brightness and eliminating
the need for ballast resistors. The RT9271 switches at 1.1
MHz, allowing the use of tiny external components. The
input and output capacitor can be as small as 1uF, saving
space and cost versus alternative solutions. A low 0.25V
feedback voltage minimizes power loss in the current
setting resistor for better efficiency.
The RT9271 is available in low profile SOT-23-6 package.
Features
Inherently Matched LED Current
Up to 80mA Output Current @ V
OUT
< 12V
High Efficiency : 85% Typical
Drives Up to Three LEDs from 2.8V Supply
20V Internal Switch
Fast 1.1 MHz Switching Frequency
Uses Tiny 1 mm Height Inductors
Requires Only 1uF Output Capacitor
Low Profile
SOT-23-6
Package
Optional 15V Over Voltage Protection
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Mobile Phone
Digital Still Camera
PDAs, Handheld Computers
MP3 Players
GPS Receivers
Ordering Information
RT9271
Package Type
B : SOT-23-5
E : SOT-23-6
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Pin Configurations
(TOP VIEW)
VCC
5
1
LX
2
GND
EN
4
3
FB
VCC OVP
6
1
LX
5
2
GND
EN
4
3
FB
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.
SOT-23-5
SOT-23-6
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.
Note
: There is no pin1 indicator on top mark for
SOT-23-6
type, and pin1 will be lower left pin when reading top mark
from left to right.
DS9271-13 March 2007
www.richtek.com
1

RT9271GE Related Products

RT9271GE RT9271PE RT9271 RT9271GB RT9271PB
Description White LED Step-Up Converter in Tiny Package White LED Step-Up Converter in Tiny Package White LED Step-Up Converter in Tiny Package White LED Step-Up Converter in Tiny Package White LED Step-Up Converter in Tiny Package
Impressions of the first day of the Munich Shanghai Electronics Show
[i=s]This post was last edited by RichCastle on 2014-3-19 23:18[/i] :loveliness:From March 18 to 20, 2014, the Munich Shanghai Electronics Show was held as scheduled at the Shanghai New International ...
RichCastle Talking
Chip CH551 please write a simple program
[i=s] This post was last edited by experts on 2020-1-4 18:48 [/i]CH551 needs a program to be written into the chipPlease let me know how much the reward is. How much is the price? Add a friend. Thanks...
高手们带带我 MCU
What type of multiplier is DC synthesized? Is it necessary to write a special multiplier in Verilog?
Hello everyone:What type of multiplier does DC synthesize for "*"? Is it necessary to write a multiplier in Verilog ? My working clock is about 20m, and the data bit is 32 bits. I need the multiplier ...
eeleader-mcu FPGA/CPLD
"Aofei Electronics" AVR16 development board chip manual collection
Friends of Aofei Electronics who have exchanged chip coins in the forum no longer need to look for chip manuals everywhere, I have prepared them for you....
ming1005 MCU
Some standards related to wireless technology (Part 2)
[b]Emerging Wireless Technology Standards[/b] As interest in wireless technology in the process industry continues to grow, the number of available technologies has also increased - and the desire to ...
banana RF/Wirelessly
Ring core, knowing the size, how to calculate its power
Ring-shaped, material: silicon steel sheet, height 100mm, thickness 80mm [[i] This post was last edited by longhaozheng on 2011-7-26 19:13 [/i]]...
longhaozheng Power technology

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 22  239  1593  673  1308  1  5  33  14  27 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号