TL7660

ACTIVE

CMOS Voltage Converter

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Type Converter Iout (max) (A) 0.1 Vin (min) (V) 1.5 Vin (max) (V) 10 Switching frequency (min) (kHz) 3 Switching frequency (max) (kHz) 100 Features Unregulated Vout (min) (V) -1.5 Vout (max) (V) -10 Iq (typ) (µA) 110
Rating Catalog Operating temperature range (°C) -40 to 125 Type Converter Iout (max) (A) 0.1 Vin (min) (V) 1.5 Vin (max) (V) 10 Switching frequency (min) (kHz) 3 Switching frequency (max) (kHz) 100 Features Unregulated Vout (min) (V) -1.5 Vout (max) (V) -10 Iq (typ) (µA) 110
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Simple Voltage Conversion, Including
    • Negative Converter
    • Voltage Doubler
  • Wide Operating Range. . .1.5 V to 10 V
  • Requires Only Two External (Noncritical) Capacitors
  • No External Diode Over Full Temperature and Voltage Range
  • Typical Open-Circuit Voltage Conversion Efficiency. . .99.9%
  • Typical Power Efficiency. . .98%
  • Full Testing at 3 V
  • APPLICATIONS
    • On-Board Negative Supplies
    • Data-Acquisition Systems
    • Portable Electronics

  • Simple Voltage Conversion, Including
    • Negative Converter
    • Voltage Doubler
  • Wide Operating Range. . .1.5 V to 10 V
  • Requires Only Two External (Noncritical) Capacitors
  • No External Diode Over Full Temperature and Voltage Range
  • Typical Open-Circuit Voltage Conversion Efficiency. . .99.9%
  • Typical Power Efficiency. . .98%
  • Full Testing at 3 V
  • APPLICATIONS
    • On-Board Negative Supplies
    • Data-Acquisition Systems
    • Portable Electronics

The TL7660 is a CMOS switched-capacitor voltage converter that perform supply-voltage conversions from positive to negative. With only two noncritical external capacitors needed for the charge pump and charge reservoir functions, an input voltage within the range from 1.5 V to 10 V is converted to a complementary negative output voltage of -1.5 V to -10 V. The device can also be connected as a voltage doubler to generate output voltages up to 18.6 V with a 10-V input.

The basic building blocks of the IC include a linear regulator, an RC oscillator, a voltage-level translator, and four power MOS switches. To ensure latch-up-free operation, the circuitry automatically senses the most negative voltage in the device and ensures that the N-channel switch source-substrate junctions are not forward biased. The oscillator frequency runs at a nominal 10 kHz (for VCC = 5 V), but that frequency can be decreased by adding an external capacitor to the oscillator (OSC) terminal or increased by overdriving OSC with an external clock.

For low-voltage operation (VIN < 3.5 V), LV should be tied to GND to bypass the internal series regulator. Above 3.5 V, LV should be left floating to prevent device latchup.

The TL7660C is characterized for operation over a free-air temperature range of -40°C to 85°C. The TL7660I is characterized for operation over a free-air temperature range of -40°C to 125°C.

The TL7660 is a CMOS switched-capacitor voltage converter that perform supply-voltage conversions from positive to negative. With only two noncritical external capacitors needed for the charge pump and charge reservoir functions, an input voltage within the range from 1.5 V to 10 V is converted to a complementary negative output voltage of -1.5 V to -10 V. The device can also be connected as a voltage doubler to generate output voltages up to 18.6 V with a 10-V input.

The basic building blocks of the IC include a linear regulator, an RC oscillator, a voltage-level translator, and four power MOS switches. To ensure latch-up-free operation, the circuitry automatically senses the most negative voltage in the device and ensures that the N-channel switch source-substrate junctions are not forward biased. The oscillator frequency runs at a nominal 10 kHz (for VCC = 5 V), but that frequency can be decreased by adding an external capacitor to the oscillator (OSC) terminal or increased by overdriving OSC with an external clock.

For low-voltage operation (VIN < 3.5 V), LV should be tied to GND to bypass the internal series regulator. Above 3.5 V, LV should be left floating to prevent device latchup.

The TL7660C is characterized for operation over a free-air temperature range of -40°C to 85°C. The TL7660I is characterized for operation over a free-air temperature range of -40°C to 125°C.

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Technical documentation

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* Data sheet TL7660 datasheet 01 Jun 2006
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018

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PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian

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