MAX872/MAX874
10A, Low-Dropout,
Precision Voltage References
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
General Description
The MAX872/MAX874 precision 2.5V and 4.096V micro-
power voltage references consume a maximum of only
10A and operate from supply voltages up to 20V. The
combination of ultra-low quiescent current and low
200mV dropout makes them ideal for battery-powered
equipment. They source and sink up to 500A with only
200mV input voltage headroom, which makes the 2.5V
MAX872 ideal for use with a 3V supply and the 4.096V
MAX874 ideal for use with a 5V supply.
Initial accuracy of 0.2% at +25C (5mV for the MAX872,
8mV for the MAX874) and low 40ppm/C max drift make
these references suitable for a wide range of precision
applications.
Applications
Hand-Held Instruments
Battery-Operated Equipment
Power Supplies
Features
o
Output Voltage
2.500V 0.2% (MAX872)
4.096V 0.2% (MAX874)
o
Wide Operating Voltage Range
2.7V to 20V (MAX872)
4.3V to 20V (MAX874)
o
10A Max Supply Current
o
40ppm/C Max Drift Over Extended Temp. Range
o
Line Regulation Over Temp.
20V/V (MAX872)
75V/V (MAX874)
o
Load Regulation Over Temp.
0.6mV/mA Max (MAX872)
1.0mV/mA Max (MAX874)
o
500A Sink/Source Current
V
OUT
TRIM
GND
1
2
8
7
COMP
I.C.
V
IN
TEMP
I.C.
DIP/SO
TOP VIEW
3
4
6
5
MAX872
MAX874
GND
V
IN
3.0V (MAX872)
5.0V (MAX874)
REFERENCE WITH TRIMMED OUTPUT
V
OUT
TRIM
MAX872
MAX874
Typical Operating Circuit
19-0005; Rev 2; 6/97
PART
MAX872
CPA
MAX872CSA
MAX872C/D
0C to +70C
0C to +70C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
*
Dice are specified at +25C only.
Pin Configuration
Ordering Information
MAX872EPA
MAX872ESA
-40C to +85C
-40C to +85C
8 Plastic DIP
8 SO
MAX874
CPA
MAX874CSA
MAX874C/D
0C to +70C
0C to +70C
0C to +70C
8 Plastic DIP
8 SO
Dice*
MAX874EPA
MAX874ESA
-40C to +85C
-40C to +85C
8 Plastic DIP
8 SO
MAX872/MAX874
10A, Low-Dropout,
Precision Voltage References
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--MAX872
(V
IN
= 2.7V, I
L
= 0mA, T
A
= +25C, unless otherwise noted.)
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.
Supply Voltage .......................................................................24V
Output Short-Circuit Duration ..........Continuous to Either Supply
C
COMP
Input...........................................................-0.3V to V
OUT
TRIM Input ...................................................-0.3V to (V
IN
+ 0.3V)
TEMP Output ...............................................-0.3V to (V
IN
+ 0.3V)
Continuous Power Dissipation (T
A
= +70C)
Plastic DIP (derate 9.09mW/C above +70C) .............727mW
SO (derate 5.88mW/C above +70C) ..........................471mW
Operating Temperature Ranges
MAX87_C__ .........................................................0C to +70C
MAX87_E__ ......................................................-40C to +85C
Storage Temperature Range .............................-65C to +150C
Junction Temperature Range (T
j
) ......................-65C to +160C
Lead Temperature (soldering, 10sec) .............................+300C
V
IN
= 4.5V to 20V
0.1Hz to 10Hz
V
OUT
short to V
IN
V
OUT
short to GND
V
IN
= 2.7V to 20V
V
IN
= 2.7V to 5.5V
Sourcing 0mA to 0.5mA
Sinking 0mA to -0.5mA
V
OUT
V
OUT
+ 0.2V
CONDITIONS
mV
+75/-20 +100/-25
V
ADJ
V
OUT
Adjustment Range
4
12
Vp-p
60
e
n
V
2.495
2.500
2.505
V
OUT
Output Voltage
Output Voltage Noise
mV
690
V
TEMP
TEMP Voltage
mA
3
9
I
SC
Short-Circuit Output Current
6
15
A/V
0.35
0.55
I
Q
/V
IN
Change in Supply Current vs. V
IN
V/V
80
250
V
OUT
/V
IN
Line Regulation
0.2
0.5
mV/mA
4
12
V
OUT
/I
OUT
Load Regulation (Note 1)
A
6.5
10
I
Q
Quiescent Supply Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
ELECTRICAL CHARACTERISTICS--MAX874
(V
IN
= 4.3V, I
L
= 0mA, T
A
= +25C, unless otherwise noted.)
V
IN
= 4.3V to 20V
0.1Hz to 10Hz
V
OUT
short to V
IN
V
OUT
short to GND
V
IN
= 4.3V to 20V
Sourcing 0mA to 0.5mA
Sinking 0mA to -0.5mA
V
OUT
V
OUT
+ 0.2V
CONDITIONS
mV
150
200
V
ADJ
V
OUT
Adjustment Range
15
75
Vp-p
90
e
n
V
4.088
4.096
4.104
V
OUT
Output Voltage
Output Voltage Noise
mV
690
V
TEMP
TEMP Voltage
mA
5
25
I
SC
Short-Circuit Output Current
6
15
A/V
0.35
0.55
I
Q
/V
IN
Change in Supply Current vs. V
IN
V/V
V
OUT
/V
IN
Line Regulation
0.15
0.9
mV/mA
6
15
V
OUT
/I
OUT
Load Regulation (Note 1)
A
6.5
10
I
Q
Quiescent Supply Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
MAX872/MAX874
10A, Low-Dropout,
Precision Voltage References
_______________________________________________________________________________________
3
Note 1:
If the load current exceeds 300A, connect a minimum of 1000pF from V
OUT
to GND. Note that if a capacitor larger than
1000pF is used, a compensation capacitor of C
OUT
/100 must be connected from V
OUT
to COMP.
ELECTRICAL CHARACTERISTICS--MAX872C
(V
IN
= 2.7V, I
L
= 0mA, T
A
= 0C to +70C, unless otherwise noted.)
V
IN
= 4.5V to 20V
V
IN
= 2.7V to 20V
V
IN
= 2.7V to 5.5V
Sourcing 0mA to 0.4mA
Sinking 0mA to -0.4mA
CONDITIONS
20
ppm/C
20
40
TCV
OUT
V
2.4905
2.5095
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient
mV/C
2.3
TCV
TEMP
TEMP Output Temperature
Coefficient
A/V
0.7
I
Q
/V
IN
Change in Supply Current vs. V
IN
V/V
300
V
OUT
/V
IN
Line Regulation
0.6
mV/mA
15
V
OUT
/I
OUT
Load Regulation (Note 1)
A
15
I
Q
Quiescent Supply Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
IN
V
OUT
+ 0.2V
mV
+75/-20
V
ADJ
V
OUT
Adjustment Range
ELECTRICAL CHARACTERISTICS--MAX874C
(V
IN
= 4.3V, I
L
= 0mA, T
A
= 0C to +70C, unless otherwise noted.)
V
IN
V
OUT
+ 0.2V
mV
150
V
IN
= 4.3V to 20V
V
ADJ
V
OUT
Adjustment Range
V
IN
= 4.3V to 20V
Sourcing 0mA to 0.4mA
Sinking 0mA to -0.4mA
CONDITIONS
75
ppm/C
20
40
TCV
OUT
V
4.0805
4.1115
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient
mV/C
2.3
TCV
TEMP
TEMP Output Temperature
Coefficient
A/V
0.7
I
Q
/V
IN
Change in Supply Current vs. V
IN
V/V
V
OUT
/V
IN
Line Regulation
1.0
mV/mA
25
V
OUT
/I
OUT
Load Regulation (Note 1)
A
15
I
Q
Quiescent Supply Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
MAX872/MAX874
10A, Low-Dropout,
Precision Voltage References
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS--MAX872E
(V
IN
= 2.7V, I
L
= 0mA, T
A
= -40C to +85C, unless otherwise noted.)
V
IN
V
OUT
+ 0.2V
mV
+75/-20
V
IN
= 4.5V to 20V
V
ADJ
V
OUT
Adjustment Range
V
IN
= 2.7V to 20V
V
IN
= 2.7V to 5.5V
Sourcing 0mA to 0.30mA
Sinking 0mA to -0.30mA
CONDITIONS
20
ppm/C
20
40
TCV
OUT
V
2.488
2.512
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient
mV/C
2.3
TCV
TEMP
TEMP Output Temperature
Coefficient
A/V
0.7
I
Q
/V
IN
Change in Supply Current vs. V
IN
V/V
300
V
OUT
/V
IN
Line Regulation
0.6
mV/mA
15
V
OUT
/I
OUT
Load Regulation
A
15
I
Q
Quiescent Supply Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
ELECTRICAL CHARACTERISTICS--MAX874E
(V
IN
= 4.3V, I
L
= 0mA, T
A
= -40C to +85C, unless otherwise noted.)
V
IN
V
OUT
+ 0.2V
mV
150
V
IN
= 4.3V to 20V
V
ADJ
V
OUT
Adjustment Range
V
IN
= 4.3V to 20V
Sourcing 0mA to 0.30mA
Sinking 0mA to -0.30mA
CONDITIONS
75
ppm/C
20
40
TCV
OUT
V
4.077
4.115
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient
mV/C
2.3
TCV
TEMP
TEMP Output Temperature
Coefficient
A/V
0.7
I
Q
/V
IN
Change in Supply Current vs. V
IN
V/V
V
OUT
/V
IN
Line Regulation
1.0
mV/mA
25
V
OUT
/I
OUT
Load Regulation
A
15
I
Q
Quiescent Supply Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
MAX872/MAX874
10A, Low-Dropout,
Precision Voltage References
_______________________________________________________________________________________
5
0
50
150
100
200
250
100
150
200
250
DROPOUT VOLTAGE
vs. SOURCE CURRENT
MAX872/74-01
SOURCE CURRENT (
A)
DROPOUT VOLTAGE (mV)
T
A
= +85C
T
A
= -40C
T
A
= +25C
0
10
5
15
20
0
2
4
6
8
10 12 14 16 18
20
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX872/74-02
INPUT VOLTAGE (V)
SUPPLY CURRENT (
A)
MAX874
MAX872
5
10
15
20
-50
-25
0
25
50
75
100
MAX872
SUPPLY CURRENT vs. TEMPERATURE
MAX872/74-03
TEMPERATURE (C)
SUPPLY CURRENT (
A)
NO LOAD
V
IN
= 20V
V
IN
= 5V
V
IN
= 3V
V
IN
= 10V
5
15
10
20
25
-50
-25
0
25
50
75
100
MAX874
SUPPLY CURRENT vs. TEMPERATURE
MAX872/74-04
TEMPERATURE (C)
SUPPLY CURRENT (
A)
V
IN
= 20V
V
IN
= 10V
V
IN
= 5V
0
2
1
3
4
-50
-25
0
25
50
75
100
MAX872
LOAD REGULATION vs. TEMPERATURE
MAX872/74-07
TEMPERATURE (C)
LOAD REGULATION (mV/mA)
SINKING 0
A TO -500
A
SOURCING 0
A TO 500
A
2.495
2.498
2.500
2.503
2.505
2
6
10
16
4
8
14
18
12
20
MAX872
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX872/74-05
INPUT VOLTAGE (V)
V
OUT
(V)
4.090
4.094
4.092
4.096
4.098
4.100
4
8
12
16
6
10
14
18
20
MAX874
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX872/74-06
INPUT VOLTAGE (V)
V
OUT
(V)
0
3
2
1
4
5
-50
-25
0
25
50
75
100
MAX874
LOAD REGULATION vs. TEMPERATURE
MAX872/74-08
TEMPERATURE (C)
LOAD REGULATION (mV/mA)
SINKING 0
A TO -500
A
SOURCING 0
A TO 500
A
2.498
0.01
10
1
0.1
MAX872
OUTPUT VOLTAGE
vs. SOURCE CURRENT
2.501
2.500
2.502
2.499
MAX872/74-09
SOURCE CURRENT (mA)
V
OUT
(V)
Typical Operating Characteristics
(V
IN
= 3V (MAX872), V
IN
= 5V (MAX874), no load, T
A
= +25C, unless otherwise noted.)
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