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LM2685

National Semiconductor
Part Number LM2685
Manufacturer National Semiconductor
Description Dual Output Regulated Switched Capacitor Voltage Converter
Published Mar 22, 2005
Detailed Description LM2685 Dual Output Regulated Switched Capacitor Voltage Converter May 2000 LM2685 Dual Output Regulated Switched Capac...
Datasheet PDF File LM2685 PDF File

LM2685
LM2685

Overview
LM2685 Dual Output Regulated Switched Capacitor Voltage Converter May 2000 LM2685 Dual Output Regulated Switched Capacitor Voltage Converter General Description The LM2685 CMOS charge-pump voltage converter operates as an input voltage doubler, +5V regulator and inverter for an input voltage in the range of +2.
85V to +6.
5V.
Five low cost capacitors are used in this circuit to provide up to 50mA of output current at +5V ( ± 5%), and 15mA at −5V.
The LM2685 operates at a 130 kHz switching frequency to reduce output resistance and voltage ripple.
With an operating current of only 800µA (operating efficiency greater than 80% with most loads) and 6µA typical shutdown current, the LM2685 is ideal for use in battery powered systems.
The device is in a small 14-pin TSSOP package.
Features n n n n n n n +5V regulated output Inverts V05(+5V) to VNEG(−5V) Doubles input supply voltage TSSOP-14 package 80% typical conversion efficiency at 25mA Input voltage range of 2.
85V to 6.
5V Independent shu...


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