Datasheet > RT9261-29CB

RT9261-29CB

更新时间： 2024-09-24 05:05:15

品牌	Logo	应用领域
立锜 - RICHTEK		转换器
页数	文件大小	规格书
14页	219K
描述
VFM Step-up DC/DC Converter

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中文翻译

获取价格

数据手册

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RT9261-29CB 数据手册

Preliminary

RT9261/A

VFM Step-up DC/DC Converter

General Description

Features

The RT9261 Series are VFM Step-up DC/DC ICs

with ultra low supply current by CMOS process and

suitable for use with battery-powered instruments.

^zMinimal Number of External Components ( Only

an inductor, a diode, and a capacitor)

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

2% High Output Voltage Accuracy

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-up DC/DC

converter can be constructed of this RT9261 IC with

only three external components.

^zLow Ripple and Low Noise

^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-25 Small Packages

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

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. CE pin enables circuit to set the

standby supply current at a maximum of 0.5µA.

z Power source for applications, which require

higher voltage than that of batteries used in the

appliances

Ordering Information

Pin Configurations

RT9261A-ꢀꢀ ꢀ ꢀ

Package type

B : SOT-25

Part Number

Pin Configurations

TOP VIEW

RT9261-ꢀꢀCX

(Plastic SOT-89)

1. GND

X : SOT-89

2. VOUT (TAB)

3. LX

Operating temperature range

C: Commercial standard

TOP VIEW

RT9261A-ꢀꢀCX

(Plastic SOT-89)

Output voltage

15 : 1.5V

16 : 1.6V

49 : 4.9V

50 : 5.0V

1. GND

2. VOUT (TAB)

3. EXT

TOP VIEW

RT9261-ꢀꢀCB

(Plastic SOT-25)

1. CE

2. VOUT

3. NC

A : Use external switch

Use internal switch

4. GND

5. LX

TOP VIEW

RT9261A-ꢀꢀCB

(Plastic SOT-25)

1. CE

2. VOUT

3. NC

4. GND

5. EXT

DS9261/A-03 January 2002

www.richtek-ic.com.tw

12 3 4 5 6 7...14

中文翻译

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