Datasheet Texas Instruments LM2681M6/NOPB — 数据表

LM2681
www.ti.com SNVS042B – MARCH 1999 – REVISED MAY 2013 LM2681 Switched Capacitor Voltage Converter
Check for Samples: LM2681 FEATURES DESCRIPTION The LM2681 CMOS charge-pump voltage converter
operates as a voltage doubler for an input voltage in
the range of +2.5V to +5.5V. Two low cost capacitors
and a diode (needed during start-up) is used in this
circuit to provide up to 20 mA of output current. The
LM2681 can also work as a voltage divider to split a
voltage in the range of +1.8V to +11V in half. 1 2 Doubles or Splits Input Supply Voltage
SOT-23 6-Lead Package
15О© Typical Output Impedance
90% Typical Conversion Efficiency at 20 mA APPLICATIONS Cellular Phones
Pagers
PDAs
Operational Amplifier Power Suppliers
Interface Power Suppliers
Handheld Instruments The LM2681 operates at 160 kHz oscillator frequency
to reduce output resistance and voltage ripple. With
an operating current of only 550 ВµA (operating
efficiency greater than 90% with most loads) the
LM2681 provides ideal performance for battery
powered systems. The device is in a SOT-23, 6-lead
package. Basic Application Circuits …