RC4193

www.fairchildsemi.com RC4191/RC4192/RC4193 Micropower Switching Regulator Features High efficiency – 85% typical Low quiescent current – 215 mA Adjustable output – 1.3V to 30V High switch current – 200 mA Bandgap reference – 1.31V Accurate oscillator frequency – ±10% Remote shutdown capability Low battery detection circuitry Low component count 8-lead packages Description The RC4191/4192/4193 series of monolithic ICs are low power switch mode regulators intended for miniature power supply applications. These DC-to-DC converter ICs provide all of the active components needed to create supplies for micropower circuits. Contained internally are an oscillator, switch, reference, comparator, and logic, plus a discharged battery detection circuit. These regulators can achieve up to 85% efficiency in most applications while operating over a wide supply voltage range, 2.2V to 30V, at a very low quiescent current drain of 215 mA. The standard application circuit requires just seven external components for step-up operation: an inductor, a steering diode, three resistors, a low value timing capacitor, and an electrolytic filter capacitor. The combination of simple application circuit, low supply current, and small package make the RC4193 adaptable to a wide range of miniature power supply applications. The RC4193 is most suited for single ended step-up (VOUT > VIN) circuits because the NPN internal switch transistor is referenced to ground. It is complemented by Fai...