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MAX868

Part Number	MAX868
Manufacturer	Maxim
Description	Regulated / Adjustable -2x Inverting Charge Pump
Published	May 2, 2005
Detailed Description	19-1290; Rev 1; 2/98 Regulated, Adjustable -2x Inverting Charge Pump MAX868 General Description The MAX868 inverting ch...
Datasheet	MAX868 PDF File

Overview

19-1290; Rev 1; 2/98 Regulated, Adjustable -2x Inverting Charge Pump MAX868 General Description The MAX868 inverting charge pump provides a low-cost and compact means of generating a regulated negative voltage up to -2 x V IN from a positive input voltage between 1.
8V and 5.
5V.
It uses a pulse-frequencymodulation (PFM) control scheme to generate the regulated negative output voltage.
PFM operation is obtained by gating the internal 450kHz oscillator on and off as needed to maintain output voltage regulation.
This unique on-demand switching scheme gives the MAX868 excellent light-load efficiency without degrading its fullload operation (up to 30mA), permitting smaller capacitors to take adva...

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