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TC1044SEPA Datasheet(PDF) 1 Page - Microchip Technology |
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TC1044SEPA Datasheet(HTML) 1 Page - Microchip Technology |
1 / 11 page TC1044S TC1044S-12 9/16/96 EVALUATION KIT AVAILABLE © 2001 Microchip Technology Inc. DS21348A Charge Pump DC-TO-DC Voltage Converter FEATURES s Converts +5V Logic Supply to ±5V System s Wide Input Voltage Range .................... 1.5V to 12V s Efficient Voltage Conversion ......................... 99.9% s Excellent Power Efficiency ............................... 98% s Low Power Consumption ............ 80 µA @ VIN = 5V s Low Cost and Easy to Use — Only Two External Capacitors Required s RS-232 Negative Power Supply s Available in 8-Pin Small Outline (SOIC) and 8-Pin Plastic DIP Packages s Improved ESD Protection ..................... Up to 10kV s No External Diode Required for High Voltage Operation s Frequency Boost Raises FOSC to 45kHz GENERAL DESCRIPTION The TC1044S is a pin-compatible upgrade to the Indus- try standard TC7660 charge pump voltage converter. It converts a +1.5V to +12V input to a corresponding –1.5V to –12V output using only two low cost capacitors, eliminat- ing inductors and their associated cost, size and EMI. Added features include an extended supply range to 12V, and a frequency boost pin for higher operating frequency, allowing the use of smaller external capacitors. The on-board oscillator operates at a nominal frequency of 10kHz. Frequency is increased to 45kHz when pin 1 is connected to V +. Operation below 10kHz (for lower supply current applications) is possible by connecting an external capacitor from OSC to ground (with pin 1 open). The TC1044S is available in both 8-pin DIP and 8-pin small outline (SOIC) packages in commercial and extended temperature ranges. FUNCTIONAL BLOCK DIAGRAM TC1044S GND INTERNAL VOLTAGE REGULATOR RC OSCILLATOR VOLTAGE– LEVEL TRANSLATOR 2 V + CAP + 82 7 6 OSC LV 3 LOGIC NETWORK VOUT 5 CAP – 4 1 BOOST ORDERING INFORMATION Part No. Package Temp. Range TC1044SCOA 8-Pin SOIC 0 °C to +70°C TC1044SCPA 8-Pin Plastic DIP 0 °C to +70°C TC1044SEOA 8-Pin SOIC – 40 °C to +85°C TC1044SEPA 8-Pin Plastic DIP – 40 °C to +85°C TC1044SIJA 8-Pin CerDIP – 25 °C to +85°C TC1044SMJA 8-Pin CerDIP – 55 °C to +125°C TC7660EV Charge Pump Family Evaluation Kit PIN CONFIGURATION (DIP AND SOIC) 1 2 3 4 8 7 6 5 TC1044SCPA TC1044SEPA TC1044SIJA TC1044SMJA BOOST CAP + GND CAP – VOUT LOW VOLTAGE (LV) OSC + V 1 2 3 4 8 7 6 5 TC1044SCOA TC1044SEOA BOOST CAP + GND CAP – VOUT LOW VOLTAGE (LV) OSC + V |
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