Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Switched-capacitor voltage converter SOIC 8

LM2662, LM2663

www.ti.com

SNVS002D –JANUARY 1999–REVISED MAY 2013

LM2662/LM2663 Switched Capacitor Voltage Converter

Check for Samples: LM2662, LM2663

FEATURES

DESCRIPTION

The LM2662/LM2663 CMOS charge-pump voltage

• Inverts or Doubles Input Supply Voltage

converter inverts a positive voltage in the range of

• 8-Pin SOIC Package

1.5V to 5.5V to the corresponding negative voltage.

• 3.5Ω Typical Output Resistance

The LM2662/LM2663 uses two low cost capacitors to

provide 200 mA of output current without the cost,

• 86% Typical Conversion Efficiency at 200 mA

size, and EMI related to inductor based converters.

• (LM2662) Selectable Oscillator Frequency: 20

With an operating current of only 300 μA and

kHz/150 kHz

operating efficiency greater than 90% at most loads,

• (LM2663) Low Current Shutdown Mode

the LM2662/LM2663 provides ideal performance for

battery powered systems. The LM2662/LM2663 may

also be used as a positive voltage doubler.

APPLICATIONS

• Laptop computers The oscillator frequency can be lowered by adding an

external capacitor to the OSC pin. Also, the OSC pin

• Cellular phones

may be used to drive the LM2662/LM2663 with an

• Medical instruments

external clock. For LM2662, a frequency control (FC)

• Operational amplifier power supplies

pin selects the oscillator frequency of 20 kHz or 150

kHz. For LM2663, an external shutdown (SD) pin

• Interface power supplies

replaces the FC pin. The SD pin can be used to

• Handheld instruments

disable the device and reduce the quiescent current

to 10 μA. The oscillator frequency for LM2663 is 150

kHz.

Basic Application Circuits

Voltage Inverter Positive 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 (19 pages)

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LM2662, LM2663 www.ti.com SNVS002D – JANUARY 1999 – REVISED MAY 2013 LM2662/LM2663 Switched Capacitor Voltage Converter Check for Samples: LM2662, LM2663 FEATURES DESCRIPTION • • • • • The LM2662/LM2663 CMOS charge-pump voltage converter inverts a positive voltage in the range of 1.5V to 5.5V to the corresponding negative voltage. The LM2662/LM2663 uses two low cost capacitors to provide 200 mA of output current without the cost, size, and EMI related to inductor based converters.
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LM2662, LM2663 SNVS002D – JANUARY 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) 6V (OUT − 0.3V) to (GND + 3V) LV The least negative of (OUT − 0.3V) or (V+ − 6V) to (V+ + 0.
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LM2662, LM2663 www.ti.com SNVS002D – JANUARY 1999 – REVISED MAY 2013 Electrical Characteristics Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full Operating Junction Temperature Range. Unless otherwise specified: V+ = 5V, FC = Open, C1 = C2 = 47 μF. (1) Symbol V+ Parameter Supply Voltage IQ RL = 1k Supply Current Condition Min Inverter, LV = Open 3.5 5.5 Inverter, LV = GND 1.5 5.5 Doubler, LV = OUT 2.5 5.
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LM2662, LM2663 SNVS002D – JANUARY 1999 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (Circuit of Figure 1) 4 Supply Current vs Supply Voltage Supply Current vs Oscillator Frequency Figure 2. Figure 3. Output Source Resistance vs Supply Voltage Output Source Resistance vs Temperature Figure 4. Figure 5. Output Source Resistance vs Temperature Efficiency vs Load Current Figure 6. Figure 7.
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LM2662, LM2663 www.ti.com SNVS002D – JANUARY 1999 – REVISED MAY 2013 Typical Performance Characteristics (continued) (Circuit of Figure 1) Output Voltage Drop vs Load Current Efficiency vs Oscillator Frequency Figure 8. Figure 9. Output Voltage vs Oscillator Frequency Oscillator Frequency vs External Capacitance Figure 10. Figure 11. Oscillator Frequency vs Supply Voltage Oscillator Frequency vs Supply Voltage Figure 12. Figure 13.
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LM2662, LM2663 SNVS002D – JANUARY 1999 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) (Circuit of Figure 1) Oscillator Frequency vs Temperatur Oscillator Frequency vs Temperature Figure 14. Figure 15. Shutdown Supply Current vs Temperature (LM2663 Only) Figure 16. CONNECTION DIAGRAMS 8-Pin SOIC Package Figure 17.
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LM2662, LM2663 www.ti.com SNVS002D – JANUARY 1999 – REVISED MAY 2013 Pin Descriptions Pin Name 1 FC Function Voltage Inverter (LM2662) Frequency control for internal oscillator: Voltage Doubler Same as inverter. FC = open, fOSC = 20 kHz (typ); FC = V+, fOSC = 150 kHz (typ); FC has no effect when OSC pin is driven externally. 1 SD (LM2663) Shutdown control pin, tie this pin to the ground in normal operation. Same as inverter.
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LM2662, LM2663 SNVS002D – JANUARY 1999 – REVISED MAY 2013 www.ti.com APPLICATION INFORMATION SIMPLE NEGATIVE VOLTAGE CONVERTER The main application of LM2662/LM2663 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 1.5V to 5.5V. For a supply voltage less than 3.5V, the LV pin must be connected to ground to bypass the internal regulator circuitry.
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LM2662, LM2663 www.ti.com SNVS002D – JANUARY 1999 – REVISED MAY 2013 The oscillator frequency can be lowered by adding an external capacitor between OSC and GND (See typical performance characteristics). Also, in the inverter mode, an external clock that swings within 100 mV of V+ and GND can be used to drive OSC. Any CMOS logic gate is suitable for driving OSC. LV must be grounded when driving OSC. The maximum external clock frequency is limited to 150 kHz.
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LM2662, LM2663 SNVS002D – JANUARY 1999 – REVISED MAY 2013 www.ti.com Figure 19. Output Source Resistance vs Oscillator Frequency Table 3. Low ESR Capacitor Manufacturers Manufacturer Phone Capacitor Type Nichicon Corp. (708)-843-7500 PL, PF series, through-hole aluminum electrolytic AVX Corp.
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LM2662, LM2663 www.ti.com SNVS002D – JANUARY 1999 – REVISED MAY 2013 CASCADING DEVICES Cascading the LM2662s (or LM2663s) is an easy way to produce a greater negative voltage (as shown in Figure 21). If n is the integer representing the number of devices cascaded, the unloaded output voltage Vout is (−nVin). The effective output resistance is equal to the weighted sum of each individual device: (5) A three-stage cascade circuit shown in Figure 22 generates −3Vin, from Vin.
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LM2662, LM2663 SNVS002D – JANUARY 1999 – REVISED MAY 2013 www.ti.com REGULATING Vout It is possible to regulate the output of the LM2662/LM2663 by use of a low dropout regulator (such as LP2986). The whole converter is depicted in Figure 24. This converter can give a regulated output from −1.5V to −5.5V by choosing the proper resistor ratio: (6) where, Vref = 1.23V The error flag on pin 7 of the LP2986 goes low when the regulated output at pin 5 drops by about 5% below nominal.
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LM2662, LM2663 www.ti.com SNVS002D – JANUARY 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 ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-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) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM2662MX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM2663MX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM2663MX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM2662MX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM2663MX SOIC D 8 2500 367.0 367.0 35.0 LM2663MX/NOPB SOIC D 8 2500 367.0 367.0 35.
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