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MAX680C/D View Datasheet(PDF) - Maxim Integrated

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Description
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MAX680C/D
MaximIC
Maxim Integrated MaximIC
MAX680C/D Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
19-0896; Rev 1; 7/96
+5V to ±10V Voltage Converters
________________General Description
The MAX680/MAX681 are monolithic, CMOS, dual
charge-pump voltage converters that provide ±10V out-
puts from a +5V input voltage. The MAX680/MAX681 pro-
vide both a positive step-up charge pump to develop
+10V from +5V input and an inverting charge pump to
generate the -10V output. Both parts have an on-chip,
8kHz oscillator. The MAX681 has the capacitors internal to
the package, and the MAX680 requires four external
capacitors to produce both positive and negative voltages
from a single supply.
The output source impedances are typically 150, pro-
viding useful output currents up to 10mA. The low quies-
cent current and high efficiency make this device suitable
for a variety of applications that need both positive and
negative voltages generated from a single supply.
The MAX864/MAX865 are also recommended for new
designs. The MAX864 operates at up to 200kHz and uses
smaller capacitors. The MAX865 comes in the smaller
µMAX package.
________________________Applications
The MAX680/MAX681 can be used wherever a single
positive supply is available and where positive and nega-
tive voltages are required. Common applications include
generating ±6V from a 3V battery and generating ±10V
from the standard +5V logic supply (for use with analog
circuitry). Typical applications include:
±6V from 3V Lithium Cell
Hand-Held Instruments
Data-Acquisition Systems
Panel Meters
Battery-Operated
Equipment
Operational Amplifier
Power Supplies
±10V from +5V Logic
Supply
_________________Pin Configurations
TOP VIEW
C1- 1
C2+ 2
C2- 3
V- 4
MAX680
DIP/SO
8 V+
7 C1+
6 VCC
5 GND
V+ 1
C1- 2
C1- 3
C2+ 4
C2- 5
C2- 6
V- 7
MAX681
DIP
14 VCC
13 VCC
12 VCC
11 VCC
10 V+
9 GND
8 GND
____________________________Features
o 95% Voltage-Conversion Efficiency
o 85% Power-Conversion Efficiency
o +2V to +6V Voltage Range
o Only Four External Capacitors Required (MAX680)
o No Capacitors Required (MAX681)
o 500µA Supply Current
o Monolithic CMOS Design
_______________Ordering Information
PART
MAX680CPA
MAX680CSA
MAX680C/D
MAX680EPA
MAX680ESA
MAX680MJA
MAX681CPD
MAX681EPD
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 Narrow SO
Dice
8 Plastic DIP
8 Narrow SO
8 CERDIP
14 Plastic DIP
14 Plastic DIP
_________Typical Operating Circuits
+5V
4.7µF
4.7µF
GND
C1+ VCC
MAX680
C1-
V+
C1+
V-
C2- GND
+5V
FOUR PINS REQUIRED
(MAX681 ONLY)
VCC
V+
MAX681
V-
GND
GND
+5V to ±10V CONVERTER
4.7µF
+10V
-10V
4.7µF
GND
+10V
-10V
GND
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
 

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