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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC682 Datasheet

Inverting Voltage Doubler

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TC682
Inverting Voltage Doubler
Features:
• 99.9% Voltage Conversion Efficiency
• 92% Power Conversion Efficiency
• Wide Input Voltage Range:
- +2.4V to +5.5V
• Only 3 External Capacitors Required
• 185 A Supply Current
• Space-Saving 8-Pin SOIC and 8-Pin PDIP
Packages
Applications:
• -10V from +5V Logic Supply
• -6V from a Single 3V Lithium Cell
• Portable Handheld Instruments
• Cellular Phones
• LCD Display Bias Generator
• Panel Meters
• Operational Amplifier Power Supplies
Device Selection Table
Part
Number
Package
TC682COA
TC682CPA
TC682EOA
TC682EPA
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
8-Pin PDIP
Operating
Temp.
Range
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
Package Type
8-Pin PDIP
C1– 1
8 NC
C2+ 2 TC682CPA 7 C1+
C2– 3 TC682EPA 6 VIN
VOUT 4
5 GND
General Description:
The TC682 is a CMOS charge pump converter that
provides an inverted doubled output from a single
positive supply. An on-board 12 kHz (typical) oscillator
provides the clock and only 3 external capacitors are
required for full circuit implementation.
Low output source impedance (typically 140),
provides output current up to 10 mA. The TC682 fea-
tures low quiescent current and high efficiency, making
it the ideal choice for a wide variety of applications that
require a negative voltage derived from a single
positive supply (for example: generation of -6V from a
3V lithium cell or -10V generated from a +5V logic
supply).
The minimum external parts count and small physical
size of the TC682 make it useful in many medium-
current, dual voltage analog power supplies.
Functional Block Diagram
VIN +2.4V < VIN < +5.5V
GND
+
C1
+
C2
VIN
C1+
C1
TC682
C2+
C2– VOUT
GND
VOUT = -(2 x VIN )
VOUT
COUT
+
All Caps = 3.3 μF
8-Pin SOIC
C1– 1
8 NC
C2+ 2 TC682COA 7 C1+
C2– 3 TC682EOA 6 VIN
VOUT 4
5 GND
2002-2012 Microchip Technology Inc.
DS21453D-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC682 Datasheet

Inverting Voltage Doubler

No Preview Available !

TC682
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
VIN .......................................................................+5.8V
VIN dV/dT ........................................................ 1V/sec
VOUT ...................................................................-11.6V
Short-Circuit Duration - VOUT ..................... Continuous
Power Dissipation (TA 70°C)
8-Pin PDIP ..............................................730 mW
8-Pin SOIC ..............................................470 mW
Operating Temperature Range.............-40°C to +85°C
Storage Temperature (Unbiased) .......-65°C to +150°C
*Stresses above those listed under “Absolute
Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only and functional
operation of the device at these or any other conditions
above those indicated in the operation sections of the
specifications is not implied. Exposure to Absolute
Maximum Rating conditions for extended periods may
affect device reliability.
TC682 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Over operating temperature range, VIN = +5V, test circuit Figure 3-1 unless otherwise noted.
Symbol
Parameter
Min Typ Max Units
Test Conditions
VIN
IIN
ROUT
Supply Voltage Range
Supply Current
VOUT Source Resistance
FOSC
PEFF
VOUTEFF
Oscillator Frequency
Power Efficiency
Voltage Conversion Efficiency
2.4 —
5.5
— 185 300
— — 400
— 140 180
— — 230
170 320
— 12
90 92
99 99.9
V RL = 2 k
A RL = , TA = 25°C
RL =
IL– = 10 mA, TA = 25°C
IL– = 10 mA
IL– = 5 mA, VIN = 2.8V
kHz
% RL = 2 k, TA = 25°C
% VOUT, RL =
DS21453D-page 2
2002-2012 Microchip Technology Inc.


Part Number TC682
Description Inverting Voltage Doubler
Maker Microchip
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TC682 Datasheet PDF





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