TCM680COA データシートの表示（PDF） - TelCom Semiconductor Inc => Microchip
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TCM680COA Datasheet PDF : 7 Pages
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EVALUATION
KIT
AVAILABLE
1
TCM680
+5V TO ±10V VOLTAGE CONVERTER
2
FEATURES
GENERAL DESCRIPTION
s 99% Voltage Conversion Efficiency
s 85% Power Conversion Efficiency
s Wide Voltage Range ......................... +2.0V to +5.5V
s Only 4 External Capacitors Required
s Space Saving 8-Pin SOIC Design
APPLICATIONS
s ±10V From +5V Logic Supply
s ±6V From a 3V Lithium Cell
s Handheld Instruments
s Portable Cellular Phones
s LCD Display Bias Generator
s Panel Meters
s Operational Amplifier Power Supplies
The TCM680 is a dual charge pump voltage converter
that develops output voltages of +2VIN and – 2VIN from a
single input voltage of +2.0V to +5.5V. Common applica-
tions include ±10V from a single +5V logic supply, and ±6V
3 from a +3V lithium battery.
The TCM680 is packaged in a space-saving 8-pin
SOIC package and requires only four inexpensive external
capacitors. The charge pumps are clocked by an on-board
8kHz oscillator. Low output source impedances (typically
150Ω) provides maximum output currents of 10mA for each
output. Typical power conversion efficiency is 85%.
High efficiency, small installed size and low cost make
4 the TCM680 suitable for a wide variety of applications that
need both positive and negative power supplies derived
from a single input voltage.
PIN CONFIGURATIONS (DIP AND SOIC)
C1– 1
C+2 2
C2– 3
VO–UT 4
TCM680CPA
TCM680EPA
8 VO+UT
7 C+1
6 VIN
5 GND
C1– 1
C+2 2
C2– 3
VO–UT 4
8 VO+UT
7 C+1
TCM680COA 6
TCM680EOA
VIN
5 GND
ORDERING INFORMATION
Part No.
Package
Temperature
TCM680COA 8-Pin SOIC
0°C to +70°C
TCM680CPA 8-Pin Plastic DIP
TCM680EOA 8-Pin SOIC
5 0°C to +70°C
– 40°C to +85°C
TCM680EPA 8-Pin Plastic DIP
– 40°C to +85°C
TC7660EV Charge Pump Family
Evaluation Kit
6
TYPICAL OPERATING CIRCUIT
+5V
C1 +
4.7µF
C2 +
4.7µF
GND
2.0V<VIN < +5.5V
C+1
VIN
4.7µF
VO+UT
C4
+
VO+UT = ( 2 x VIN)
C1–
C+2 TCM680
VO–UT
C2–
GND
4.7µF
VO–UT = (– 2 x VIN)
C3
+
GND
TELCOM SEMICONDUCTOR, INC.
7
8
TC660-2 9/4/96
4-13
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