MC34280 Datasheet - ON Semiconductor

MC34280 Power Supply & Management IC for Handheld Electronic Products

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MC34280 Power Supply & Management IC for Handheld Electronic Products The MC34280 is a power supply integrated circuit which provides two boost regulated outputs and some power management supervisory functions. Both regulators apply Pulse Frequency Modulation (PFM). The main step up regulator output can be externally adjusted from 2.7V to 5V. An internal synchronous rectifier is used to ensure high efficiency (achieve 87%). The auxiliary regulator with a built in .

MC34280 Features

* VMAIN VMAINSW VMAINGND NC LIBAOUT LIBATIN VAUXEMR VAUXSW 32 1 VMAINFB VBAT ENABLE VDD PDELAY VREF AGND IREF LOWBATSEN NC VAUXBASE VAUXCHG VAUXBDV VAUXFBN VAUXREF VAUXFBP VAUXEN MC34280

* Low Input Voltage, 1V up

* Low Quiescent Current in Standby Mode: 35µA typical

* PFM an

MC34280_ONSemiconductor.pdf