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PDF LM2767M5 Data sheet ( Hoja de datos )

Número de pieza LM2767M5
Descripción Switched Capacitor Voltage Converter
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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No Preview Available ! LM2767M5 Hoja de datos, Descripción, Manual

February 2000
LM2767
Switched Capacitor Voltage Converter
General Description
The LM2767 CMOS charge-pump voltage converter oper-
ates as a voltage doubler for an input voltage in the range of
+1.8V to +5.5V. Two low cost capacitors and a diode are
used in this circuit to provide at least 15 mA of output current.
The LM2767 operates at 11 kHz switching frequency to
avoid audio voice-band interference. With an operating cur-
rent of only 40 µA (operating efficiency greater than 90% with
most loads), the LM2767 provides ideal performance for bat-
tery powered systems. The device is manufactured in a
SOT23-5 package.
Features
n Doubles Input Supply Voltage
n SOT23-5 Package
n 20Typical Output Impedance
n 96% Typical Conversion Efficiency at 15mA
Applications
n Cellular Phones
n Pagers
n PDAs, Organizers
n Operational Amplifier Power Suppliers
n Interface Power Suppliers
n Handheld Instruments
Basic Application Circuit
Voltage Doubler
Ordering Information
Order Number
LM2767M5
LM2767M5X
Package
Number
MA05B
MA05B
DS101274-1
Package
Marking
S17B (Note 1)
S17B (Note 1)
Supplied as
Tape and Reel (1000 units/reel)
Tape and Reel (3000 units/reel)
Note 1: The small physical size of the SOT-23 package does not allow for the full part number marking. Devices will be marked with the designation shown in
the column Package Marking.
© 2000 National Semiconductor Corporation DS101274
www.national.com

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LM2767M5 pdf
Typical Performance Characteristics (Circuit of Figure 1, VIN = 5V, TA = 25˚C unless otherwise
specified) (Continued)
Output Voltage vs
Load Current
Efficiency vs
Load Current
Switching Frequency vs
Supply Voltage
DS101274-8
Switching Frequency vs
Temperature
DS101274-9
Output Ripple vs
Load Current
DS101274-10
DS101274-11
DS101274-23
5
www.national.com

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