The MC34270 and MC34271 are low power dual switching voltage regulators, specifically designed for handheld and laptop applications, to provide several regulated output voltages using a minimum of external parts. Two uncommitted switching regulators feature a very low standby bias current of 5.0 µA, and an operating current of 7.0 mA capable of supplying output currents in excess of 200 mA.

MC34270 and MC34271 Features:

• Low Standby Bias Current of 5.0 µA

• Uncommitted Switching Regulators Allow Both Positive and Negative Supply Voltages

• Logic Enable Allows Microprocessor Control of All Outputs

• Synchronizable to External Clock

• Mode Commandable for ELD and LCD Interface

• Frequency Synchronizable

• Auxiliary Output Bias Voltages Enable Load Control via N–Channel FETs