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R1210Nxx2x Series


PWM Step-up DC/DC Converter Controller




| * Outline | * Features | * Applications | * Documenets Download |



Outline


The R1210Nxx2C/xx2D Series are PWM step-up DC/DC Converter controllers, with high accuracy, low supply current by CMOS process.

Each of the R1210Nxx2x Series consists of an oscillator, a PWM circuit, a reference voltage unit, an error amplifier, phase compensation circuit, resistors for voltage detection, a chip enable circuit, a controller against drastic load transient and an output voltage detector. A low ripple, high efficiency step-up DC/DC converter can be composed of this 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 response is improved.

Each of the R1210Nxx2x Series has a driver pin, or 'EXT' pin for external transistor. By connecting a power transistor with low ON-resistance to EXT pin, a large current flows through an inductor, thus, large output current can be supplied.

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.

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Features


*External Components Only an inductor, a diode, a capacitor, and a transistor
*Standby Current Max. 0.5µA
*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 to 6.0V
*Two choices of Basic Oscillator Frequency 100kHz(xx2C), 180kHz(xx2D)
*Output Voltage Accuracy ±2.5%
*Small Package SOT-23-5 (Mini-mold)
*Low Ripple, Low Noise
*Oscillator Start-up Voltage MAX. 0.8V

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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.
 
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Documents Download


Data Sheet
(PDF)
Package Info.
(PDF)
Mark Info.
(PDF)
Quality Assurance Data
(PDF)
*R1210Nxx2x Series
NO. EA-064-071207(247KB)
SOT-23-5 R1210N *Reliability

* All PDF files are less than 1MB unless otherwise stated.
* If you don't have Adobe Reader, you can download free.
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Technical Info.

* Application Note

Application Note

Technical Information on Ricoh Power Management ICs.
*

Quick Links

* Quality Assurance System
(PDF:175KB)
* Inductor Information
(PDF:70KB)


Product Catalog

Selection Guide
Selection guide is available for download in PDF format.



Non-promotion / Discontinued Products

* Power Management ICs
* Real-time clock ICs


Lead (Pb) Free Information

All of the Lead-free products comply with RoHS Directive. RoHS Compliant


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