Datasheet > RT9261_07

RT9261_07

更新时间： 2024-09-24 06:08:51

品牌	Logo	应用领域
立锜 - RICHTEK		转换器
页数	文件大小	规格书
12页	153K
描述
VFM Step-Up DC/DC Converter

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RT9261_07 数据手册

Preliminary

RT9261/A

VFM Step-Up DC/DC Converter

General Description

Features

^zMinimal Number of External Components ( Only

an Inductor, a Diode, and a Capacitor)

^zUltra Low Input Current ( 5μA at Switch Off)

^z± 2% High Output Voltage Accuracy

^zLow Ripple and Low Noise

The RT9261 Series are VFM Step-upDC/DC ICs with ultra

low supply current by CMOS process and suitable for

use with battery-powered instruments.

The RT9261 IC consists of an oscillator, a VFM control

circuit, a driver transistor (LX switch), a reference voltage

unit, an error amplifier, resistors for voltage detection, and

a LX switch protection circuit. A low ripple and high

efficiency step-upDC/DC converter can be constructed of

this RT9261 IC with only three external components.

^zLow Start-up Voltage, 0.85V at 1mA

^z75% Efficiency with Low Cost Inductor

^z+50 ppm/ °C Low Temperature-Drift

^zSOT-89 and SOT-23-5 Small Packages

^zRoHS Compliant and 100% Lead (Pb)-Free

The RT9261A IC provides with a drive pin (EXT) for an

external transistor, so that a power transistor can be

externally applied. Therefore, the RT9261A IC is

recommended for applications where large currents are

required. ENpin enables circuit to set the standby supply

current at a maximum of 0.5μA.

Applications

z Power source for battery-powered equipment

z Power source for cameras, camcorders, VCRs, PDAs,

pagers, electronic data banks, and hand-held

communication equipment

z Power source for applications, which require higher

voltage than that of batteries used in the appliances

Ordering Information

RT9261/A-

Package Type

B : SOT-23-5

X : SOT-89

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.

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

Output Voltage

15 : 1.5V

16 : 1.6V

49 : 4.9V

50 : 5.0V

Pin Configurations

(TOP VIEW)

Use external switch

Use internal switch

Note :

RichTek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

GND

VOUT

(TAB)

VOUT EXT

(TAB)

GND

RT9261-CX

RT9261A-CX

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

`100% matte tin (Sn) plating.

SOT-89

DS9261/A-12 March 2007

www.richtek.com

12 3 4 5 6 7...12

中文翻译

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