Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Switched-capacitor voltage converter SOT 23 6

LM2664

www.ti.com

SNVS005D –NOVEMBER 1999–REVISED MAY 2013

LM2664 Switched Capacitor Voltage Converter

Check for Samples: LM2664

FEATURES

DESCRIPTION

The LM2664 CMOS charge-pump voltage converter

• Inverts Input Supply Voltage

inverts a positive voltage in the range of +1.8V to

• 6-Pin SOT-23 Package

+5.5V to the corresponding negative voltage of −1.8V

• 12Ω Typical Output Impedance

to −5.5V. The LM2664 uses two low cost capacitors

to provide up to 40 mA of output current.

• 91% Typical Conversion Efficiency at 40 mA

• 1µA Typical Shutdown Current

The LM2664 operates at 160 kHz oscillator frequency

to reduce output resistance and voltage ripple. With

an operating current of only 220 µA (operating

APPLICATIONS

efficiency greater than 91% with most loads) and 1

• Cellular Phones

µA typical shutdown current, the LM2664 provides

• Pagers

ideal performance for battery powered systems. The

device is in a SOT-23 package.

• PDAs

• Operational Amplifier Power Suppliers

• Interface Power Suppliers

• Handheld Instruments

Basic Application Circuits

Figure 1. Voltage Inverter

Figure 2. +5V to −10V Converter

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.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (15 pages)

PAGE 1
LM2664 www.ti.com SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 LM2664 Switched Capacitor Voltage Converter Check for Samples: LM2664 FEATURES DESCRIPTION • • • • • The LM2664 CMOS charge-pump voltage converter inverts a positive voltage in the range of +1.8V to +5.5V to the corresponding negative voltage of −1.8V to −5.5V. The LM2664 uses two low cost capacitors to provide up to 40 mA of output current.
PAGE 2
LM2664 SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Supply Voltage (V+ to GND, or GND to OUT) 5.8V (GND − 0.3V) to (V+ + 0.3V) SD V+ and OUT Continuous Output Current 50 mA Output Short-Circuit Duration to GND (3) 1 sec.
PAGE 3
LM2664 www.ti.com SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 TEST CIRCUIT *C1 and C2 are 3.3 µF, SC series OS-CON capacitors. Figure 3. LM2664 Test Circuit Typical Performance Characteristics (Circuit of Figure 3 V+ = 5V unless otherwise specified) Supply Current vs Supply Voltage Supply Current vs Temperature Figure 4. Figure 5. Output Source Resistance vs Supply Voltage Output Source Resistance vs Temperature Figure 6. Figure 7.
PAGE 4
LM2664 SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) (Circuit of Figure 3 V+ = 5V unless otherwise specified) Output Voltage Drop vs Load Current Efficiency vs Load Current Figure 8. Figure 9. Oscillator Frequency vs Supply Voltage Oscillator Frequency vs Temperature Figure 10. Figure 11. Shutdown Supply Current vs Temperature Figure 12.
PAGE 5
LM2664 www.ti.com SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 CONNECTION DIAGRAMS 6-Pin Small Outline Package 1 6 2 5 3 4 Figure 13. DBV Package Top View Figure 14. Actual Size Pin Descriptions Pin Name 1 GND Power supply ground input. Function 2 OUT Negative voltage output. 3 CAP− Connect this pin to the negative terminal of the charge-pump capacitor. 4 SD Shutdown control pin, tie this pin to V+ in normal operation, and to GND for shutdown.
PAGE 6
LM2664 SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com Application Information SIMPLE NEGATIVE VOLTAGE CONVERTER The main application of LM2664 is to generate a negative supply voltage. The voltage inverter circuit uses only two external capacitors as shown in the Basic Application Circuits. The range of the input supply voltage is 1.8V to 5.5V. The output characteristics of this circuit can be approximated by an ideal voltage source in series with a resistance. The voltage source equals −(V+).
PAGE 7
LM2664 www.ti.com SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 Other Applications PARALLELING DEVICES Any number of LM2664s can be paralleled to reduce the output resistance. Each device must have its own pumping capacitor C1, while only one output capacitor Cout is needed as shown in Figure 16. The composite output resistance is: Figure 16. Lowering Output Resistance by Paralleling Devices CASCADING DEVICES Cascading the LM2664s is an easy way to produce a greater negative voltage (e.g.
PAGE 8
LM2664 SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com COMBINED DOUBLER AND INVERTER In Figure 18, the LM2664 is used to provide a positive voltage doubler and a negative voltage converter. Note that the total current drawn from the two outputs should not exceed 50 mA. Figure 18. Combined Voltage Doubler and Inverter REGULATING VOUT It is possible to regulate the negative output of the LM2664 by use of a low dropout regulator (such as LP2980). The whole converter is depicted in Figure 19.
PAGE 9
LM2664 www.ti.com SNVS005D – NOVEMBER 1999 – REVISED MAY 2013 REVISION HISTORY Changes from Revision C (May 2013) to Revision D • Page Changed layout of National Data Sheet to TI format ............................................................................................................
PAGE 10
PACKAGE OPTION ADDENDUM www.ti.
PAGE 11
PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
PAGE 12
PACKAGE MATERIALS INFORMATION www.ti.com 18-Dec-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) LM2664M6 SOT-23 DBV 6 1000 178.0 8.4 LM2664M6X SOT-23 DBV 6 3000 178.0 8.4 Pack Materials-Page 1 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.2 3.2 1.4 4.0 8.0 Q3 3.2 3.2 1.4 4.0 8.
PAGE 13
PACKAGE MATERIALS INFORMATION www.ti.com 18-Dec-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM2664M6 SOT-23 DBV 6 1000 210.0 185.0 35.0 LM2664M6X SOT-23 DBV 6 3000 210.0 185.0 35.
PAGE 14
PAGE 15
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.