AMS682_05 Datasheet, PDF (1/7 Pages) Advanced Monolithic Systems – INVERTING VOLTAGE DOUBLER

Advanced
Monolithic
Systems
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
AMS682
INVERTING VOLTAGE DOUBLER
RoHS compliant
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
AMS682ES
AMS682CS
8 LEAD PDIP
AMS682EP
AMS682CP
OPERATING
TEMPERATURE RANGE
-40 to 85° C
0 to 70° C
TYPICAL OPERATING CIRCUIT
V_IN ^{+2.4V < VIN < +5.5V}
+
C_{1 -}
+
C_{2 -}
C₁₊
V_IN
ON/OFF
C_1-
C₂₊
C_2-
V_OUT
GND
GND
All Caps = 3.3µF
V_OUT = -(2 X V_IN)
V_OUT
C_OUT
+
PIN CONFIGURATIONS
8-LEAD DIP/ 8-LEAD SOIC
C^-2 1
C⁺² 2
C^-2 3
V_OUT 4
AMS682
8 ON/OFF
7 C⁺¹
6 V_IN
5 GND
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