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TL7660CDR Arkusz danych(PDF) 1 Page - Texas Instruments |
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TL7660CDR Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 19 page www.ti.com FEATURES APPLICATIONS D,DGK,ORP PACKAGE (TOP VIEW) 1 2 3 4 8 7 6 5 NC CAP+ GND CAP− V CC OSC LV V OUT NC − Nointernalconnection DESCRIPTION/ORDERING INFORMATION TL7660 CMOS VOLTAGE CONVERTER SCAS794 – JUNE 2006 • On-Board Negative Supplies • Simple Voltage Conversion, Including • Data-Acquisition Systems – Negative Converter • Portable Electronics – 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 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. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING(2) Reel of 250 TL7660CDGKT MSOP/VSSOP – DGK TM_ Reel of 2500 TL7660CDGKR –40 °C to 85°C PDIP – P Tube of 50 TL7660CP TL7660CP Tube of 75 TL7660CD SOIC – D 7660C Reel of 2500 TL7660CDR Reel of 250 TL7660IDGKT MSOP/VSSOP – DGK TN_ Reel of 2500 TL7660IDGKR –40 °C to 125°C PDIP – P Tube of 50 TL7660IP TL7660IP Tube of 75 TL7660ID SOIC – D 7660I Reel of 2500 TL7660IDR (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. (2) DGK: The actual top-side marking has one additional character that indicates the assembly/test site. 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. PRODUCTION DATA information is current as of publication date. Copyright © 2006, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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