MAX1822

19-1892; Rev 0; 1/01 High-Side Power Supply _______________General Description The MAX1822 high-side supply, using a regulated charge pump, generates a regulated output voltage 11V greater than the input supply voltage to power high-side switching and control circuits. The MAX1822 allows low-resistance N-channel MOSFETs (FETs) to be used in circuits that normally require costly, less efficient P-channel FETs and PNP transistors. The highside output also eliminates the need for logic FETs in +5V and other low-voltage switching circuits. A +3.5V to +16.5V input supply range and a typical quiescent current of only 150µA make the MAX1822 ideal for a wide range of line- and battery-powered switching and control applications where efficiency is crucial. Also provided is a logic-level power-ready output (PR) to indicate when the high-side voltage reaches the proper level. The MAX1822 comes in an 8-pin SO package and requires three inexpensive external capacitors. The MAX1822 is a pin-for-pin replacement to the MAX622. ____________________________Features o +3.5V to +16.5V Operating Supply Voltage Range o Output Voltage Regulated to VCC + 11V (typ) o 150µA (typ) Quiescent Current o Power-Ready Output MAX1822 Ordering Information PART MAX1822ESA TEMP. RANGE -40°C to +85°C PIN-PACKAGE 8 SO ________________________Applications High-Side Power Control with N-Channel FETs Low-Dropout Voltage Regulators Power Switching from Low Supply Voltages H-Switches Stepper Motor Drivers Battery-...