General Description
The MAX680/MAX681 are monolithic, CMOS, dual charge-
pump voltage converters that provide ±10V outputs from a
+5V input voltage. The MAX680/MAX681 provide 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 150Ω, provid-
ing useful output currents up to 10mA. The low quiescent
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:
Features
● 95% Voltage-Conversion Efficiency
● 85% Power-Conversion Efficiency
● +2V to +6V Voltage Range
● Only Four External Capacitors Required (MAX680)
● No Capacitors Required (MAX681)
● 500µA Supply Current
● Monolithic CMOS Design
19-0896; Rev 2; 7/19
● ±6V from 3V Lithium Cell
● Hand-Held Instruments
● Data-Acquisition Systems
● Panel Meters
● ±10V from +5V Logic
Supply
● Battery-Operated
Equipment
● Operational Amplier
Power Supplies
PART TEMP. RANGE PIN-PACKAGE
MAX680CPA 0°C to +70°C 8 Plastic DIP
MAX680CSA 0°C to +70°C 8 Narrow SO
MAX680C/D 0°C to +70°C Dice
MAX680EPA -40°C to +85°C 8 Plastic DIP
MAX680ESA -40°C to +85°C 8 Narrow SO
MAX680MJA -55°C to +125°C 8 CERDIP
MAX681CPD 0°C to +70°C 14 Plastic DIP
MAX681EPD -40°C to +85°C 14 Plastic DIP
Pin Congurations
Typical Operating Circuits
V
CC
C2-
GNDV-
1
2
8
7
V+
C1+C2+
C1-
MAX680
DIP/SO
TOP VIEW
3
4
6
5
14
13
12
11
10
9
8
1
2
3
4
5
6
7
V
CC
V
CC
V
CC
V
CC
C2+
C1-
C1-
V+
MAX681
V+
GND
GNDV-
C2-
C2-
DIP
MAX680
+10V
4.7µF
4.7µF
4.7µF
4.7µF
-10V
GND
+10V
-10V
GND
FOUR PINS REQUIRED
(MAX681 ONLY)
+5V
GND
GND
+5V
C1-
C2+
V-
V+
C2-
V
CC
GND
+5V to ±10V CONVERTER
MAX681
V-
V+
V
CC
GND
C1+
Ordering Information
MAX680/MAX681 +5V to ±10V Voltage Converters
Click here for production status of specific part numbers.
V
CC
....................................................................................+6.2V
V+ .......................................................................................+12V
V- ........................................................................................ -12V
V- Short-Circuit Duration ..........................................Continuous
V+ Current .........................................................................75mA
V
CC
ΔV/ΔT ........................................................................1V/µs
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C). ....727mW
8-Pin Narrow SO (derate 5.88mW/°C above +70°C) .... 471mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C) ........ 640mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) 800mW
Storage Temperature Range ............................-65°C to +160°C
Lead Temperature (soldering, 10sec) ............................+300°C
(V
CC
= +5V, test circuit Figure 1, T
A
= +25°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current
V
CC
= 3V, T
A
= +25°C, R
L
= ∞ 0.5 1
mA
V
CC
= 5V, T
A
= +25°C, R
L
= ∞ 1 2
V
CC
= 5V, 0°C ≤ T
A
≤ +70°C, R
L
= ∞ 2.5
V
CC
= 5V, -40°C ≤ T
A
≤ +85°C, R
L
= ∞ 3
V
CC
= 5V, -55°C ≤ T
A
≤ +125°C, R
L
= ∞ 3
Supply-Voltage Range MIN ≤ T
A
≤ MAX, R
L
= 10kΩ 2.0 1.5 to 6.0 6.0 V
Positive Charge-Pump
Output Source Resistance
I
L+
= 10mA, I
L-
= 0mA, V
CC
= 5V, T
A
= +25°C 150 250
Ω
I
L+
= 5mA, I
L-
= 0mA, V
CC
= 2.8V, T
A
= +25°C 180 300
I
L+
= 10mA,
I
L-
= 0mA,
V
CC
= 5V
0°C ≤ T
A
≤ +70°C 325
-40°C ≤ T
A
≤ +85°C 350
-55°C ≤ T
A
≤ +125°C 400
Negative Charge-Pump
Output Source Resistance
I
L-
= 10mA, I
L+
= 0mA, V+
= 10V, T
A
= +25°C 90 150
Ω
I
L-
= 5mA, I
L+
= 0mA, V+
= 5.6V, T
A
= +25°C 110 175
I
L-
= 10mA,
I
L+
= 0mA,
V
CC
= 10V
0°C ≤ T
A
≤ +70°C 200
-40°C ≤ T
A
≤ +85°C 200
-55°C ≤ T
A
≤ +125°C 250
Oscillator Frequency 4 8 kHz
Power Efficiency R
L
= 10kΩ 85 %
Voltage-Conversion
Efficiency
V+, R
L
= ∞ 95 99
%
V+, R
L
= ∞ 90 97
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
MAX680/MAX681 +5V to ±10V Voltage Converters
www.maximintegrated.com
Maxim Integrated
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