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Doubling Inverter. LM2682 Datasheet

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Doubling Inverter. LM2682 Datasheet
















LM2682 Inverter. Datasheet pdf. Equivalent













Part

LM2682

Description

Switched Capacitor Voltage Doubling Inverter



Feature


LM2682 www.ti.com SNVS044B – NOVEMBE R 1999 – REVISED MAY 2013 LM2682 Swi tched Capacitor Voltage Doubling Invert er Check for Samples: LM2682 FEATURES 1 •2 Inverts Then Doubles Input Suppl y Voltage • Small VSSOP Package and S OIC Package • 90Ω Typical Output Im pedance • 94% Typical Power Efficienc y at 10 mA APPLICATIONS • LCD Contras t Biasing • GaAs Power Amplifier B.
Manufacture

Texas Instruments

Datasheet
Download LM2682 Datasheet


Texas Instruments LM2682

LM2682; iasing • Interface Power Supplies • Handheld Instrumentation • Laptop Com puters and PDAs DESCRIPTION The LM2682 is a CMOS charge-pump voltage inverter capable of converting positive voltage in the range of +2.0V to +5.5V to the corresponding doubled negative voltage of −4.0V to −11.0V respectively. Th e LM2682 uses three low cost capacitors to provide 10 mA of output .


Texas Instruments LM2682

current without the cost, size, and EMI related to inductor based circuits. Wit h an operating current of only 150 μA and an operating efficiency greater tha n 90% with most loads, the LM2682 provi des ideal performance for battery power ed systems. The LM2682 offers a switchi ng frequency of 6 kHz. Typical Operati ng Circuit and Pin Configuration 8-Pin VSSOP or 8-Pin SOI.


Texas Instruments LM2682

C These devices have limited built-in E SD protection. The leads should be shor ted together or the device placed in co nductive foam during storage or handlin g to prevent electrostatic damage to th e MOS gates. 1 Please be aware that an important notice concerning availabili ty, standard warranty, and use in criti cal applications of Texas Instruments s emiconductor produ.





Part

LM2682

Description

Switched Capacitor Voltage Doubling Inverter



Feature


LM2682 www.ti.com SNVS044B – NOVEMBE R 1999 – REVISED MAY 2013 LM2682 Swi tched Capacitor Voltage Doubling Invert er Check for Samples: LM2682 FEATURES 1 •2 Inverts Then Doubles Input Suppl y Voltage • Small VSSOP Package and S OIC Package • 90Ω Typical Output Im pedance • 94% Typical Power Efficienc y at 10 mA APPLICATIONS • LCD Contras t Biasing • GaAs Power Amplifier B.
Manufacture

Texas Instruments

Datasheet
Download LM2682 Datasheet




 LM2682
LM2682
www.ti.com
SNVS044B – NOVEMBER 1999 – REVISED MAY 2013
LM2682 Switched Capacitor Voltage Doubling Inverter
Check for Samples: LM2682
FEATURES
1
2 Inverts Then Doubles Input Supply Voltage
• Small VSSOP Package and SOIC Package
• 90Typical Output Impedance
• 94% Typical Power Efficiency at 10 mA
APPLICATIONS
• LCD Contrast Biasing
• GaAs Power Amplifier Biasing
• Interface Power Supplies
• Handheld Instrumentation
• Laptop Computers and PDAs
DESCRIPTION
The LM2682 is a CMOS charge-pump voltage
inverter capable of converting positive voltage in the
range of +2.0V to +5.5V to the corresponding
doubled negative voltage of 4.0V to 11.0V
respectively. The LM2682 uses three low cost
capacitors to provide 10 mA of output current without
the cost, size, and EMI related to inductor based
circuits. With an operating current of only 150 μA and
an operating efficiency greater than 90% with most
loads, the LM2682 provides ideal performance for
battery powered systems. The LM2682 offers a
switching frequency of 6 kHz.
Typical Operating Circuit and Pin Configuration
8-Pin VSSOP
or 8-Pin SOIC
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.
1
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.
All trademarks are the property of their respective owners.
2
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.
Copyright © 1999–2013, Texas Instruments Incorporated




 LM2682
LM2682
SNVS044B – NOVEMBER 1999 – REVISED MAY 2013
www.ti.com
Absolute Maximum Ratings(1)
Input Voltage (VIN)
VIN dV/dT
VOUT
VOUT Short-Circuit Duration
Storage Temperature
+5.8V
1V/μsec
11.6V
Continuous
65°C to +150°C
Lead Temperature Soldering
+300°C
Power Dissipation(2)
VSSOP
SOIC
300 mW
470 mW
TJMAX
+150°C
(1) Absolute Maximum Ratings are those values beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test
conditions, see the Electrical Characteristics.
(2) The maximum power dissipation must be de-rated at elevated temperatures (only needed for TA>85°C) and is limited by TJMAX
(maximum junction temperature), θJ-A (junction to ambient thermal resistance) and TA (ambient temperature). θJ-A is 140°C/W for the
SOIC-8 package and 220°C/W for the VSSOP-8 package. The maximum power dissipation at any temperature is:PDissMAX = (TJMAX
TA)/θJ-A up to the value listed in the Absolute Maximum Ratings.
Operating Ratings
ESD Susceptibility(1)
Ambient Temp. Range
Junction Temp. Range
Human Body Model
Machine Model
2 kV
200V
40°C to +85°C
40°C to +125°C
(1) The human body model is a 100 pF capacitor discharged through a 1.5 kresistor into each pin. The machine model is a 200pF
capacitor discharged directly into each pin.
LM2682
Electrical Characteristics
VIN = 5V and C1 = C2 = C3 = 3.3μF unless otherwise specified. Limits with bold typeface apply over the full operating ambient
temperature range, 40°C to +85°C, limits with standard typeface apply for TA = 25°C.
Symbol
Parameter
Conditions
Min
Typical (1)
Max
Units
VIN
Supply Voltage Range
IIN
Supply Current
RL = 2 k
Open Circuit, No Load
2.0
5.5
V
150
300
μA
400
ROUT
VOUT Source Resistance
IL = 10 mA
90
150
200
fOSC
fSW
ηPOWER
ηVOLTAGE
Oscillator Frequency
Switching Frequency
Power Efficiency
Voltage Conversion Efficiency
IL=5 mA, VIN=2 V
See (2)
See (2)
RL = 2k (3)
110
250
12
30
kHz
6
15
kHz
90
93
%
99.9
%
(1) Typical numbers are at 25°C and represent the most likely norm.
(2) The output switches operate at one half of the oscillator frequency, fOSC = 2fSW.
(3) The minimum specification is specified by design and is not tested.
2
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Product Folder Links: LM2682
Copyright © 1999–2013, Texas Instruments Incorporated




 LM2682
www.ti.com
Pin Number
1
2
3
4
5
6
7
8
LM2682
SNVS044B – NOVEMBER 1999 – REVISED MAY 2013
Table 1. PIN DESCRIPTIONS
Symbol
C1
C2+
C2
VOUT
GND
VIN
C1+
NC
Description
Capacitor C1 negative terminal
Capacitor C2 positive terminal
Capacitor C2 negative terminal
Negative output voltage (2VIN)
Device ground
Power supply voltage
Capacitor C1 positive terminal
No Connection
Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: LM2682
Submit Documentation Feedback
3




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