TC1044S

Features:

`Converts +5V Logic Supply to ±5V System
`Wide Input Voltage Range .................... 1.5V to 12V
`Efficient Voltage Conversion ......................... 99.9%
`Excellent Power Efficiency ...............................98%
`Low Power Consumption ............ 80µA @ V<sub>IN</sub> = 5V
`Low Cost and Easy to Use
- Only Two External Capacitors Required
`RS-232 Negative Power Supply
`Available in 8-Pin Small Outline (SOIC) and 8-Pin
`Plastic DIP Packages
`Improved ESD Protection ..................... Up to 10kV
`No External Diode Required for High Voltage Operation
`Frequency Boost Raises FOSC to 45kHz




Specifications

Parameter NameValueTypical Active Output Current (mA)20Output Voltage (V)Vout = -Vin or Vout = 2VinTypical Quiescent Current (A)80Input Voltage Range (V)1.5 to 12Operating Temp. Range (°C)-45 to 85Device DescriptionInverting or Doubling

Parameter Name	Value
Typical Active Output Current (mA)	20
Output Voltage (V)	Vout = -Vin or Vout = 2Vin
Typical Quiescent Current (A)	80
Input Voltage Range (V)	1.5 to 12
Operating Temp. Range (°C)	-45 to 85
Device Description	Inverting or Doubling

Description

The TC1044S is a pin-compatible upgrade to the Industry 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, eliminating 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. Theon-boardoscillatoroperates atanominalfrequency 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.