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TCM680

Microchip
Part Number TCM680
Manufacturer Microchip
Description Voltage Converter
Published Jan 23, 2024
Detailed Description Obsolete Device TCM680 +5V To ±10V Voltage Converter Features • 99% Voltage Conversion Efficiency • 85% Power Conversio...
Datasheet PDF File TCM680 PDF File

TCM680
TCM680

Overview
Obsolete Device TCM680 +5V To ±10V Voltage Converter Features • 99% Voltage Conversion Efficiency • 85% Power Conversion Efficiency • Input Voltage Range: - +2.
0V to +5.
5V • Only 4 External Capacitors Required • 8-Pin SOIC Package Applications • ±10V From +5V Logic Supply • ±6V From a 3V Lithium Cell • Handheld Instruments • Portable Cellular Phones • LCD Display Bias Generator • Panel Meters • Operational Amplifier Power Supplies Typical Operating Circuit +5V C1+ 4.
7 µF C2 + 4.
7 µF GND C1+ VIN VOUT+ C1- TCM680 C2+ VOUT- C2- GND C4 + 4.
7 µF VOUT+ = (2 x VIN) VOUT- = -(2 x VIN) C3 + 4.
7 µF GND General Description The TCM680 is a dual charge pump, voltage converter that produces output voltages of +2VIN and -2VIN from a single input voltage of +2.
0V to +5.
5V.
Common applications include ±10V from a single +5V logic supply and ±6V from a +3V lithium battery.
The TCM680 is packaged in 8-pin SOIC and PDIP packages and requires only four inexpensive, external capacitors.
The charge pumps are clocked by an onboard 8 kHz oscillator.
Low output source impedances (typically 140 Ω) provide maximum output currents of 10 mA for each output.
Typical power conversion efficiency is 85%.
High efficiency, small size and low cost make the TCM680 suitable for a wide variety of applications that need both positive and negative power supplies derived from a single input voltage.
Package Type PDIP C1- 1 8 VOUT+ C2+ 2 TCM680CPA 7 C1+ C2- 3 TCM680EPA 6 VIN VOUT- 4 5 GND SOIC C1- 1 8 VOUT+ C2+ 2 TCM680COA 7 C1+ C2- 3 TCM680EOA 6 VIN VOUT- 4 5 GND © 2005 Microchip Technology Inc.
DS21486C-page 1 TCM680 1.
0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings† VIN .
+5.
8V VOUT+ .
.
.
.
+11.
6V VOUT– -11.
6V VOUT+ Short-Circuit Duration.
.
Continuous VOUT+ Current .
.
.
...


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