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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.

adding an external capacitor to the oscillator (OSC) terminal or increased by overdriving OSC with an external

clock.

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

ORDERABLE PART NUMBER

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.