RC4190

( DataSheet : www.DataSheet4U.com ) www.fairchildsemi.com RC4190 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 including small outline (SO-8) Description The RC4190 monolithic IC is a low power switch mode regulator intended for miniature power supply applications. This DC-to-DC converter IC provides all of the active components needed to create supplies for micropower circuits (load power up to 400 mW, or up to 10W with an external power transistor). Contained internally are an oscillator, switch, reference, comparator, and logic, plus a discharged battery detection circuit. Application areas include on-card circuits where a non-standard voltage supply is needed, or in battery operated instruments where an RC4190 can be used to extend battery lifetime. 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,...