MAX1719/MAX1720/MAX1721 SOT23, Switched-Capacitor Voltage Inverters with Shutdown
■General Description
◆The ultra-small MAX1719/MAX1720/MAX1721 monolithic,CMOS charge-pump inverters accept input voltages ranging from +1.5V to +5.5V. The MAX1720 operates at12kHz, and the MAX1719/MAX1721 operate at 125kHz.High efficiency, small external components, and logic-controlled shutdown make these devices ideal for both battery-powered and board-level voltage conversion applications.
◆Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX1719/MAX1720/MAX1721 application is generating a -5Vsupply from a +5V logic supply to power analog circuitry.All three parts come in a 6-pin SOT23 package and can deliver a continuous 25mA output current.
◆For pin-compatible SOT23 switched-capacitor voltage inverters without shutdown (5-pin SOT23), see theMAX828/MAX829 and MAX870/MAX871 data sheets. For applications requiring more power, the MAX860/MAX861deliver up to 50mA. For regulated outputs (up to -2 x VIN),refer to the MAX868. The MAX860/MAX861 and MAX868are available in space-saving μMAX packages.
■Features
◆1nA Logic-Controlled Shutdown
◆6-Pin SOT23 Package
◆99.9% Voltage Conversion Efficiency
◆50μA Quiescent Current (MAX1720)
◆+1.5V to +5.5V Input Voltage Range
◆25mA Output Current
◆Requires Only Two 1μF Capacitors(MAX1719/MAX1721)
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MAX1719 、 MAX1720 、 MAX1721 、 MAX1719EUT 、 MAX1720EUT 、 MAX1721EUT 、 MAX828 、 MAX829 、 MAX870 、 MAX871 、 MAX868 、 MAX860 、 MAX861 |
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[ Local Negative Supply from a Positive Supply ][ Small LCD Panels ][ GaAs PA Bias Supply ][ Handy-Terminals ][ PDAs ][ Battery-Operated Equipment ] |
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Datasheet |
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Please see the document for details |
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SOT23-6 |
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English Chinese Chinese and English Japanese |
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4/04 |
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Rev 2 |
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19-1439 |
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928 KB |
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