PWM Step-up DC/DC Controller
The R1210Nxx2C/xx2D Series are CMOS-based PWM step-up DC/DC Converter controllers, with high accuracy, low supply current.
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.
|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%|
|Low Ripple, Low Noise|
|Oscillator Start-up Voltage||Max. 0.8V|
- •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.
|Data Sheet||Flyer||Package Info.||Mark Info.||Quality Assurance Data|
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