TC682EOA Microchip Technology, TC682EOA Datasheet

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TC682EOA

Manufacturer Part Number
TC682EOA
Description
IC INVERTING VOLT DOUBLER 8SOIC
Manufacturer
Microchip Technology
Type
Switched Capacitor (Charge Pump), Doubler, Invertingr
Datasheets

Specifications of TC682EOA

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
-4.8 ~ -11 V
Current - Output
10mA
Frequency - Switching
12kHz
Voltage - Input
2.4 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Power - Output
470mW
Primary Input Voltage
5.5V
No. Of Outputs
1
Output Current
10mA
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Peak Reflow Compatible (260 C)
Yes
Switching Frequency Max
12kHz
Function
Inverting
Output Voltage
- 10 V
Maximum Operating Temperature
85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant

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Features:
• 99.9% Voltage Conversion Efficiency
• 92% Power Conversion Efficiency
• Wide Input Voltage Range:
• Only 3 External Capacitors Required
• 185 μA Supply Current
• Space-Saving 8-Pin SOIC and 8-Pin PDIP
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
Package Type
© 2006 Microchip Technology Inc.
TC682COA
TC682CPA
TC682EOA
TC682EPA
- +2.4V to +5.5V
Packages
Number
Part
8-Pin SOIC
8-Pin SOIC
8-Pin PDIP
8-Pin PDIP
V
Package
OUT
C
C
C
1
2
2
+
1
2
3
4
8-Pin PDIP
TC682CPA
TC682EPA
Inverting Voltage Doubler
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
Operating
Range
Temp.
8
7
6
5
NC
C
V
GND
1
IN
+
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 140Ω),
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
V
GND
OUT
C
C
C
V
2
1
2
IN
+
1
2
3
4
+2.4V < V
8-Pin SOIC
C
C
TC682COA
1
2
TC682EOA
+
+
IN
All Caps = 3.3 μF
< +5.5V
C
C
C
C
1
1
2
2
+
+
TC682
8
7
6
5
GND
V
IN
TC682
NC
C
V
GND
V
IN
1
+
OUT
V
DS21453C-page 1
OUT
+
C
= -(2 x V
OUT
V
OUT
IN
)

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TC682EOA Summary of contents

Page 1

... Functional Block Diagram +2.4V < Operating Temp Range 0°C to +70°C 0°C to +70°C C -40°C to +85°C 2 -40°C to +85°C GND 8-Pin SOIC – TC682COA TC682EOA V 6 – GND OUT TC682 < +5. – – TC682 + -( ...

Page 2

... Microchip Technology Inc. listed under “Absolute Test Conditions kΩ ∞ 25° ∞ – mA 25° – – ...

Page 3

... C1– Input. Capacitor C1 negative terminal. 2 C2+ Input. Capacitor C2 positive terminal. 3 C2– Input. Capacitor C2 negative terminal Output. Negative output voltage (-2V OUT 5 GND Input. Ground Input. Power supply voltage C1+ Input. Capacitor C1 positive terminal connection. © 2006 Microchip Technology Inc. TC682 Description ). IN DS21453C-page 3 ...

Page 4

... SW4 -10V Charge Pump – Phase -11.6V. Never OUT efficiency under the following / (-2V ) OUT - OUT IN DROP DROP OUT OUT = OUT DROP if the impedances of the pump capaci- are high with respect to their respective will reduce 3 © 2006 Microchip Technology Inc. ...

Page 5

... C1 and C2 (assume 0.5Ω ESR). C1 must be rated at 6VDC or greater while C2 and C3 must be rated at 12VDC or greater. © 2006 Microchip Technology Inc. Output voltage ripple is affected by C3. Typically the larger the value of C3 the less the ripple for a given load current. The formula for ...

Page 6

... C 1 TC682 + μF OUT – – GND OUT V OUT IN Negative LDO – 22 μF Regulator + – C OUT TC54VC2702Exx V V OUT which is OUT V – OUT Negative Supply – C – 22 μF OUT + Ground + 1 μF – -5 Supply LOW BATTERY © 2006 Microchip Technology Inc. ...

Page 7

... V (V) IN Output Ripple vs. Output Current 200 150 μF 100 C3 = 100 μ OUTPUT CURRENT (mA) © 2006 Microchip Technology Inc. = 25°C unless otherwise noted -7.5 C1 – 3.3 µ -8.0 -8.5 -9.0 -9.5 -10.0 -10 Output Source Resistance vs. Temperature 200 OUT 180 160 ...

Page 8

... Pin 1 .260 (6.60) .240 (6.10) .070 (1.78) .040 (1.02) .040 (1.02) .020 (0.51) .015 (0.38) .008 (0.20) .022 (0.56) .015 (0.38) W Reel Size 13 in .310 (7.87) .290 (7.37) 3° Min. .400 (10.16) .310 (7.87) Dimensions: inches (mm) © 2006 Microchip Technology Inc. ...

Page 9

... SOIC .050 (1.27) Typ. .197 (5.00) .189 (4.80) .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10) © 2006 Microchip Technology Inc. Pin 1 .157 (3.99) .244 (6.20) .150 (3.81) .228 (5.79) .069 (1.75) .053 (1.35) ° 8 Max. .050 (1.27) .016 (0.40) TC682 ...

Page 10

... TC682 NOTES: DS21453C-page 10 © 2006 Microchip Technology Inc. ...

Page 11

... To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions. © 2006 Microchip Technology Inc. CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • Distributor or Representative • ...

Page 12

... What deletions from the document could be made without affecting the overall usefulness there any incorrect or misleading information (what and where)? 7. How would you improve this document? DS21453C-page 12 Total Pages Sent ________ FAX: (______) _________ - _________ N Literature Number: DS21453C © 2006 Microchip Technology Inc. ...

Page 13

... PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 14

... Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2006 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-399 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...

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