Datasheet

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

Table Of Contents

LM2665

www.ti.com

SNVS009F –NOVEMBER 1999–REVISED MAY 2013

LM2665 Switched Capacitor Voltage Converter

Check for Samples: LM2665

FEATURES

DESCRIPTION

The LM2665 CMOS charge-pump voltage converter

• Doubles or Splits Input Supply Voltage

operates as a voltage doubler for an input voltage in

• 6-Pin SOT-23 Package

the range of +2.5V to +5.5V. Two low cost capacitors

• 12Ω Typical Output Impedance

and a diode (needed during start-up) are used in this

circuit to provide up to 40 mA of output current. The

• 90% Typical Conversion Efficiency at 40 mA

LM2665 can also work as a voltage divider to split a

• 1µA Typical Shutdown Current

voltage in the range of +1.8V to +11V in half.

The LM2665 operates at 160 kHz oscillator frequency

APPLICATIONS

to reduce output resistance and voltage ripple. With

• Cellular Phones

an operating current of only 650 µA (operating

• Pagers

efficiency greater than 90% with most loads) and 1µA

typical shutdown current, the LM2665 provides ideal

• PDAs

performance for battery powered systems. The

• Operational Amplifier Power Suppliers

device is in a SOT-23 package.

• Interface Power Suppliers

• Handheld Instruments

Basic Application Circuits

Voltage Doubler

Splitting V

in Half

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 (16 pages)

PAGE 1
LM2665 www.ti.com SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 LM2665 Switched Capacitor Voltage Converter Check for Samples: LM2665 FEATURES DESCRIPTION • • • • • The LM2665 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of +2.5V to +5.5V. Two low cost capacitors and a diode (needed during start-up) are used in this circuit to provide up to 40 mA of output current. The LM2665 can also work as a voltage divider to split a voltage in the range of +1.
PAGE 2
LM2665 SNVS009F – 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) V+ to GND Voltage: 5.8V OUT to GND Voltage: 11.6V OUT to V+ Voltage: 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
LM2665 www.ti.com SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 Electrical Characteristics (continued) Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: V+ = 5V, C1 = C2 = 3.3 μF.(1) Symbol VOEFF Parameter Condition Voltage Conversion Efficiency Min Typ 99 99.96 No Load (2) (3) Max (2) Units % Test Circuit Figure 1.
PAGE 4
LM2665 SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) (Circuit of Figure 1, V+ = 5V unless otherwise specified) 4 Output Source Resistance vs Supply Voltage Output Source Resistance vs Temperature Figure 4. Figure 5. Output Voltage Drop vs Load Current Efficiency vs Load Current Figure 6. Figure 7. Oscillator Frequency vs Supply Voltage Oscillator Frequency vs Temperature Figure 8. Figure 9.
PAGE 5
LM2665 www.ti.com SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 Typical Performance Characteristics (continued) (Circuit of Figure 1, V+ = 5V unless otherwise specified) Shutdown Supply Current vs Temperature Figure 10.
PAGE 6
LM2665 SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com CONNECTION DIAGRAM 6-Pin Small Outline Package 1 6 2 5 3 4 Figure 11. DBV Package Top View Figure 12. Actual Size Pin Functions Pin Function Name Voltage Doubler Voltage Split 1 V+ Power supply positive voltage input. Positive voltage output. 2 GND Power supply ground input Same as doubler 3 CAP− Connect this pin to the negative terminal of the chargepump capacitor Same as doubler.
PAGE 7
LM2665 www.ti.com SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 APPLICATION INFORMATION POSITIVE VOLTAGE DOUBLER The main application of the LM2665 is to double the input voltage. The range of the input supply voltage is 2.5V 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 2V+.
PAGE 8
LM2665 SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com The selection of capacitors is based on the specifications of the dropout voltage (which equals Iout Rout), the output voltage ripple, and the converter efficiency. Low ESR capacitors () are recommended to maximize efficiency, reduce the output voltage drop and voltage ripple. Low ESR Capacitor Manufacturers Manufacturer Phone Capacitor Type Nichicon Corp. (708)-843-7500 PL & PF series, through-hole aluminum electrolytic AVX Corp.
PAGE 9
LM2665 www.ti.com SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 Figure 15. Increasing Output Voltage by Cascading Devices REGULATING VOUT It is possible to regulate the output of the LM2665 by use of a low dropout regulator (such as LP2980-5.0). The whole converter is depicted in Figure 16. A different output voltage is possible by use of LP2980-3.3, LP2980-3.0, or LP2980-adj.
PAGE 10
LM2665 SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com REVISION HISTORY Changes from Revision E (May 2013) to Revision F • 10 Page Changed layout of National Data Sheet to TI format ............................................................................................................
PAGE 11
PACKAGE OPTION ADDENDUM www.ti.
PAGE 12
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 13
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) LM2665M6 SOT-23 DBV 6 1000 178.0 8.4 LM2665M6X 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 14
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) LM2665M6 SOT-23 DBV 6 1000 210.0 185.0 35.0 LM2665M6X SOT-23 DBV 6 3000 210.0 185.0 35.
PAGE 15
PAGE 16
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.