LM2681 Datasheet | Texas Instruments

FEATURES - 2 Doubles or Splits Input Supply Voltage - SOT-23 6-Lead Package - 15Ω Typical Output Impedance - 90% Typical Conversion Efficiency at 20 m A APPLICATIONS - Cellular Phones - Pagers - PDAs - Operational Amplifier Power Suppliers - Interface Power Suppliers - Handheld Instruments 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 m A 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. The LM2681 operates at 160 k Hz oscillator frequency to reduce output resistance and voltage ripple. With an operating current of only 550 µA (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 Voltage Doubler Splitting Vin in Half Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1999- 2013, Texas Instruments Incorporated SNVS042B - MARCH 1999 - REVISED MAY 2013 .ti. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings(1)(2) V+ to GND Voltage OUT to GND Voltage OUT to V+ Voltage V+ and OUT Continuous Output...