TC682CPA View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
'TC682CPA' PDF : 14 Pages View PDF
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
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