產品介紹：

R1210NXX2C/XX2D系列為PWM升壓DC/DC變換器控制器，精度高，CMOS工藝低電流。

R1210NXX2X系列的每一個都由振蕩器、PWM電路、參考電壓單元、誤差放大器、相位補償電路、電壓檢測電阻、芯片使能電路、抗劇烈負載暫態控制器和輸出電壓檢測器組成。一個低紋波，高效率的升壓DC/DC變換器可以由這種集成電路組成，只需要四個外部組件，或一個電感，一個二極管，一個晶體管和一個電容。

R1210NXX2X系列可通過電路控制器檢測輸出電壓的急劇變化，提高了負載的瞬態響應。

每個R1210NXX2X系列都有一個驅動引腳，或外部晶體管的“EXT”引腳。通過將一個低通電阻的功率電阻電阻電阻連接到EXT'引腳，大電流通過電感，從而可以提供大輸出電流。

內置芯片使能電路，以超低靜電流實現待機。

由于這些集成電路的封裝是小型SOT-23-5，因此可以在板上高密度安裝集成電路。

產品特性：

外部組件……

只有電感、二極管、電容和晶體管

當前……TYP備用。OuA

低的輸出電壓溫度漂移系數....TYP.±100ppm/C

輸出電壓 ...........在2.2V到6.0 v范圍內，步長0.1V進行逐級設置

兩種基本振蕩器頻率......的選擇100千赫(XX2C), 180千赫(XX2D)

小包裝……OT-23-5 (Mini-mold)

低波紋，低噪聲

振蕩器的啟動電壓 .....................MAX.0.8v

應用程序

電池供電設備的電源。

便攜式通訊設備，照相機，錄像機的電源

要求電壓高于電池電壓的電器的電源。

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OUTLINE

The R1210NXX2C/XX2D Series are PWM step-up DC/DC Converter controllers, with high accuracy, low supplycurrent by CMOS process.

Each of the R1210NXX2X Series consists of an oscillator, a PWM circuit, a reference voltage unit, an error ampli-fier, phase compensation circuit, resistors for voltage detection, a chip enable circuit, a controller against drastic loadtransient and an output voltage detector. A low ripple, high efficiency step-up DC/DC converter can be composed ofthis IC with only four external components, or an inductor, a diode, a transistor and a capacitor.

The R1210NXX2X Series can detect drastic change of output voltage with a circuit controller, the load transient re-sponse is improved.

Each of the R1210NXX2X Series has a driver pin, or 'EXT' pin for external transistor. By connecting a power ran-sistor with low ON-resistance to EXT' pin, a large current flows through an inductor thus, large output current can besupplied.

The built-in chip enable circuit can make the standby mode with ultra low quiescent current.

Since the package for these ICs is small SOT-23-5, high density mounting of the ICs on board is possible.

FEATURES

External Components ...…

Only an inductor, a diode, a capacitor, and a transistor

Standby Current .......TYP. OuA

Low 'Temperature-Drift Coefficient of Output Voltage....TYP.±100ppm/C

Output Voltage ...........Stepwise Setting with a step of 0.1V in the range of 2.2V to6.0V

Two choices of Basic Oscillator Frequency......100kHz (XX2C),180kHz(XX2D)

Small Package.......OT-23-5(Mini-mold)

Low Ripple, Low Noise

Oscillator Start-up Voltage..................... MAX.0.8v

APPLICATIONS

Power source for battery-powered equipment.

Power source for portable communication appliances, cameras,VCRs

Power source for appliances which require higher voltage than battery voltage.