AMS682 Просмотр технического описания (PDF) - Advanced Monolithic Systems Inc
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AMS682 Datasheet PDF : 7 Pages
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Advanced
Monolithic
Systems
AMS682
INVERTING VOLTAGE DOUBLER
FEATURES
• 99.9% Voltage Conversion Efficiency
• 92% Power Conversion Efficiency
• Wide Input Voltage Range +2.4V to 5.5V
• 185µA Supply Current
• Available in SO-8 and PDIP Packages
• Only 3 external Capacitors Required
APPLICATIONS
• Portable Handheld Instrumentation
• Cellular Phones
• Panel Meters
• -10V from +5V logic Supply
• -6V from a Single 3V Lithium Cell
• LCD Display Bias Generator
• Operational Amplifiers Power Supplies
GENERAL DESCRIPTION
The AMS682 is a CMOS charge pump converter that provides an inverted doubled output from a single positive supply.
Requiring only three external capacitors for full circuit implementation the device has an on -board 12kHz (typical) oscillator
which provides the clock.
Low output source impedance (typically 140Ω), provides output current up to 10mA. The AMS682 features 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. The compact size and minimum external parts count of the AMS682 makes it useful in
many medium current, dual voltage analog power supplies.
The AMS682E is operational in the full industrial temperature range of -40°C to 85°C while AMS682C is operating over a
0°C to 70°C temperature range. The AMS682E/AMS682C are available in surface mount 8-Pin SOIC (SO-8) and 8-Pin
Plastic DIP (PDIP) packages.
ORDERING INFORMATION:
PACKAGE TYPE
8 LEAD SOIC
8 LEAD PDIP
AMS682ES
AMS682CS
AMS682EP
AMS682CP
OPERATING
TEMPERATURE RANGE
-40 to 85° C
0 to 70° C
TYPICAL OPERATING CIRCUIT
VIN +2.4V < VIN < +5.5V
+
C1 -
+
C2 -
C1+
VIN
ON/OFF
C1-
C2+
C2-
VOUT
GND
GND
All Caps = 3.3µF
VOUT = -(2 X VIN)
VOUT
COUT
+
PIN CONFIGURATIONS
8-LEAD DIP/ 8-LEAD SOIC
C-2 1
C+2 2
C-2 3
VOUT 4
AMS682
8 ON/OFF
7 C+1
6 VIN
5 GND
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
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