19-0915; Rev 2; 9/08
MAX630/MAX4193
CMOS Micropower Step-Up Switching Regulator
General Description
Maxim’s MAX630 an...
19-0915; Rev 2; 9/08
MAX630/MAX4193
CMOS Micropower Step-Up Switching
Regulator
General Description
Maxim’s MAX630 and MAX4193 CMOS DC-DC
regulators are designed for simple, efficient, minimum-size DC-DC converter circuits in the 5mW to 5W range. The MAX630 and MAX4193 provide all control and power handling functions in a compact 8-pin package: a 1.31V bandgap reference, an oscillator, a voltage comparator, and a 375mA N-channel output MOSFET. A comparator is also provided for low-battery detection.
Operating current is only 70µA and is nearly independent of output switch current or duty cycle. A logic-level input shuts down the
regulator to less than 1µA quiescent current. Low-current operation ensures high efficiency even in low-power battery-operated systems. The MAX630 and MAX4193 are compatible with most battery voltages, operating from 2.0V to 16.5V.
The devices are pin compatible with the Raytheon bipolar circuits, RC4191/2/3, while providing significantly improved effici...