19-2211; Rev 2; 12/02
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
General Description
The MAX6018 is a precision, low-voltage, low-dropout,
micropower voltage reference in a SOT23 package. This
three-terminal reference operates with an input voltage
from (V
OUT
+ 200mV) to 5.5V, and is available with out-
put voltage options of 1.2V, 1.6V, 1.8V, and 2.048V
The MAX6018 voltage reference consumes less than
5µA (max) of supply current and can source and sink
up to 1mA of load current. Unlike conventional shunt-
mode (two-terminal) references that waste supply cur-
rent and require an external resistor, devices in the
MAX6018 family offer a supply current that is virtually
independent of supply voltage (with only 0.1µA/V varia-
tion with supply voltage) and do not require an external
resistor. The MAX6018 has initial accuracies of 0.2% (A
grade) and 0.4% (B grade) and temperature drift of
50ppm/°C (max). The low-dropout voltage and the
ultra-low, supply voltage-independent supply current
make this device ideal for two-cell alkaline, end-of-life,
battery-monitoring systems. The MAX6018 is available
in a tiny 3-pin SOT23 package.
o
1.6V Output from 1.8V Input
o
Ultra-Small, 3-Pin SOT23 Package
o
Initial Accuracy: ±0.2% (max)
o
Low Temperature Drift: 50ppm/°C (max)
o
200mV Dropout Voltage
o
Load Regulation (1mA Source): 700µV/mA (max)
o
Line Regulation (V
OUT
+ 200mV) to 5.5V: 250µV/V
(max)
o
Four Output Voltage Options: 1.2V, 1.6V,
1.8V, 2.048V
Features
o
Ultra-Low Supply Current: 5µA (max)
MAX6018
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
3 SOT23-3
3 SOT23-3
3 SOT23-3
3 SOT23-3
3 SOT23-3
3 SOT23-3
3 SOT23-3
3 SOT23-3
TOP
MARK
FZJH
FZJI
FZJJ
FZJK
FZJL
FZJM
FZJN
FZJO
Applications
Two-Cell, Battery-Operated Systems
Battery-Operated Equipment
Hand-Held Equipment
Data-Acquisition Systems
Industrial and Process-Control Systems
MAX6018AEUR12-T -40°C to +85°C
MAX6018BEUR12-T -40°C to +85°C
MAX6018AEUR16-T -40°C to +85°C
MAX6018BEUR16-T -40°C to +85°C
MAX6018AEUR18-T -40°C to +85°C
MAX6018BEUR18-T -40°C to +85°C
MAX6018AEUR21-T -40°C to +85°C
MAX6018BEUR21-T -40°C to +85°C
Typical Application Circuit
V
CC
IN
OUT
*
REFERENCE
OUT
MAX6018
1µF, MAX*
GND
Selector Guide
PART
MAX6018AEUR12
MAX6018BEUR12
OUTPUT
VOLTAGE (V)
1.263
1.263
1.600
1.600
1.800
1.800
2.048
2.048
INITIAL
ACCURACY (%)
±0.2
±0.4
±0.2
±0.4
±0.2
±0.4
±0.2
±0.4
*OPTIONAL
Pin Configuration
TOP VIEW
IN
1
MAX6018AEUR16
MAX6018BEUR16
MAX6018AEUR18
MAX6018BEUR18
MAX6018
OUT
2
3
GND
MAX6018AEUR21
MAX6018BEUR21
SOT23
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
MAX6018
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
V
IN
............................................................................-0.3V to +6V
Output Short-Circuit Duration to GND or V
IN
............Continuous
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SOT23 (derate 4.0mW/°C above +70°C).............320mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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 (MAX6018_12–1.263V)
(V
IN
= 1.8V; C
OUT
= 47nF, I
OUT
= 0; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
Output Voltage
Output Voltage Temperature
Drift
Line Regulation
Load Regulation
Short-Circuit Current
Long-Term Stability
Thermal Hysteresis
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
INPUT
Supply Voltage Range
Quiescent Supply Current
Change in Quiescent Supply
Current vs. Input Voltage
V
IN
I
IN
∆I
IN
/∆V
IN
Guaranteed by Line Regulation Test
T
A
= +25°C
T
A
= T
MIN
to T
MAX
1.8V
≤
V
IN
≤
5.5V
1.8
3
3
0.1
5.5
5
6
0.5
V
µA
µA/V
t
R
C
OUT
e
OUT
0.1Hz to 10Hz
10Hz to 10kHz
V
IN
= 1.8V ±100mV (f = 120Hz)
Settling to 0.1%; C
OUT
= 5nF
(Note 2)
47
45
100
85
200
1000
µVp-p
µVRMS
dB
µs
nF
V
OUT
TCV
OUT
∆V
OUT
/
∆V
IN
∆V
OUT
/
∆I
OUT
I
SC
∆V
OUT
/
Time
MAX6018A_12 (0.2%)
MAX6018B_12 (0.4%)
(Note 2)
1.8V
≤
V
IN
≤
5.5V
0
≤
I
OUT
≤
1mA
-100µA
≤
I
OUT
≤
0
Sourcing to GND
Sinking from V
IN
1000hrs at T
A
= +25°C
(Note 4)
1.2605
1.2580
1.2630
1.2630
16
50
90
2
3
6
100
130
1.2655
1.2681
50
400
700
9
V
ppm/
o
C
µV/V
µV/mA
µV/µA
mA
ppm
ppm
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
ELECTRICAL CHARACTERISTICS (MAX6018_16–1.600V)
(V
IN
= 1.8V; C
OUT
= 47nF, I
OUT
= 0; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
Output Voltage
Output Voltage Temperature
Drift
Line Regulation
Load Regulation
Dropout Voltage (Note 3)
Short-Circuit Current
Long-Term Stability
Thermal Hysteresis
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
INPUT
Supply Voltage Range
Quiescent Supply Current
Change in Quiescent Supply
Current vs. Input Voltage
V
IN
I
IN
∆I
IN
/∆V
IN
Guaranteed by Line Regulation Test
T
A
= +25°C
T
A
= T
MIN
to T
MAX
1.8V
≤
V
IN
≤
5.5V
1.8
3
3
0.1
5.5
5
6
0.5
V
µA
µA/V
t
R
C
OUT
e
OUT
0.1Hz to 10Hz
10Hz to 10kHz
V
IN
= 1.8V ±100mV (f = 120Hz)
Settling to 0.1%; C
OUT
= 5nF
(Note 2)
0.1
40
150
85
200
1000
µVp-p
µVRMS
dB
µs
nF
V
OUT
TCV
OUT
∆V
OUT
/
∆V
IN
∆V
OUT
/
∆I
OUT
V
IN
- V
OUT
I
SC
∆V
OUT
/
Time
MAX6018A_16 (0.2%)
MAX6018B_16 (0.4%)
(Note 2)
1.8V
≤
V
IN
≤
5.5V
0
≤
I
OUT
≤
1mA
-750µA
≤
I
OUT
≤
0
I
OUT
= 1mA
Sourcing to GND
Sinking from V
IN
1000hrs at T
A
= +25°C
(Note 4)
T
A
= +25°C
T
A
= +25°C
1.5968
1.5936
1.6000
1.6000
16
40
90
0.6
100
6
2
100
130
1.6032
1.6064
50
250
700
50
200
V
ppm/
o
C
µV/V
µV/mA
µV/µA
mV
mA
ppm
ppm
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6018
_______________________________________________________________________________________
3
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
MAX6018
ELECTRICAL CHARACTERISTICS (MAX6018_18–1.800V)
(V
IN
= 2.0V; C
OUT
= 47nF, I
OUT
= 0; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
Output Voltage
Output Voltage Temperature Drift
Line Regulation
Load Regulation
Dropout Voltage (Note 3)
Short-Circuit Current
Long-Term Stability
Thermal Hysteresis
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
INPUT
Supply Voltage Range
Quiescent Supply Current
Change in Quiescent Supply
Current vs. Input Voltage
V
IN
I
IN
∆I
IN
/∆V
IN
Guaranteed by Line Regulation Test
T
A
= +25°C
T
A
= T
MIN
to T
MAX
2V
≤
V
IN
≤
5.5V
2.0
3
3
0.1
5.5
5
6
0.5
V
µA
µA/V
t
R
C
OUT
e
OUT
0.1Hz to 10Hz
10Hz to 10kHz
V
IN
= 2.0V ±100mV (f = 120Hz)
Settling to 0.1%; C
OUT
= 5nF
(Note 2)
0.1
45
160
85
200
1000
µVp-p
µVRMS
dB
µs
nF
V
OUT
TCV
OUT
∆V
OUT
/
∆V
IN
∆V
OUT
/
∆I
OUT
V
IN
- V
OUT
I
SC
∆V
OUT
/
Time
MAX6018A_18 (0.2%)
MAX6018B_18 (0.4%)
(Note 2)
2.0V
≤
V
IN
≤
5.5V
0
≤
I
OUT
≤
1mA
-1mA
≤
I
OUT
≤
0
I
OUT
= 1mA
Sourcing to GND
Sinking from V
IN
1000hrs at T
A
= +25°C
(Note 4)
T
A
= +25°C
T
A
= +25°C
1.7964
1.7928
1.8000
1.8000
16
40
90
0.4
100
7.5
3
100
130
1.8036
1.8072
50
275
800
50
200
V
ppm/
o
C
µV/V
µV/mA
µV/µA
mV
mA
ppm
ppm
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4
_______________________________________________________________________________________
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
ELECTRICAL CHARACTERISTICS (MAX6018_21–2.048V)
(V
IN
= 2.25V; C
OUT
= 47nF, I
OUT
= 0; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
Output Voltage
Output Voltage Temperature Drift
Line Regulation
Load Regulation
Dropout Voltage (Note 3)
Short-Circuit Current
Long-Term Stability
Thermal Hysteresis
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
INPUT
Supply Voltage Range
Quiescent Supply Current
Change in Quiescent Supply
Current vs. Input Voltage
V
IN
I
IN
∆I
IN
/∆V
IN
Guaranteed by Line Regulation Test
T
A
= +25°C
T
A
= T
MIN
to T
MAX
2.25V
≤
V
IN
≤
5.5V
2.25
3
3
0.1
5.5
5
6
0.5
V
µA
µA/V
t
R
C
OUT
e
OUT
0.1Hz to 10Hz
10Hz to 10kHz
V
IN
= 2.25V ±100mV (f = 120Hz)
Settling to 0.1%; C
OUT
= 5nF
(Note 2)
0.1
50
175
85
200
1000
µVp-p
µVRMS
dB
µs
nF
V
OUT
TCV
OUT
∆V
OUT
/
∆V
IN
∆V
OUT
/
∆I
OUT
V
IN
- V
OUT
I
SC
∆V
OUT
/
Time
MAX6018A_21 (0.2%)
MAX6018B_21 (0.4%)
(Note 2)
2.25V
≤
V
IN
≤
5.5V
0
≤
I
OUT
≤
1mA
-1mA
≤
I
OUT
≤
0
I
OUT
= 1mA
Sourcing to GND
Sinking from V
IN
1000hrs at T
A
= +25°C
(Note 4)
T
A
= +25°C
T
A
= +25°C
2.0439
2.0398
2.0480
2.0480
16
45
90
0.3
100
10
4
100
130
2.0521
2.0562
50
330
1000
50
200
V
ppm/
o
C
µV/V
µV/mA
µV/µA
mV
mA
ppm
ppm
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6018
Note 1:
Devices are 100% production tested at T
A
= +25°C and are guaranteed by design from T
A
= T
MIN
to T
MAX
.
Note 2:
Not production tested. Guaranteed by design.
Note 3:
Dropout voltage is the minimum input voltage at which V
OUT
changes
≤
0.2% from V
OUT
at rated V
IN
and is guaranteed by
Load Regulation Test.
Note 4:
Thermal hysteresis is defined as the change in T
A
= +25°C output voltage before and after temperature cycling of the device
(from T
A
= T
MIN
to T
MAX
). Initial measurement at T
A
= +25°C is followed by temperature cycling the device to T
A
= +85°C
then to T
A
= -40°C and another measurement at T
A
= +25°C is compared to the original measurement at T
A
= +25°C.
_______________________________________________________________________________________
5
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