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
5A (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 0.1A/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.
Applications
Two-Cell, Battery-Operated Systems
Battery-Operated Equipment
Hand-Held Equipment
Data-Acquisition Systems
Industrial and Process-Control Systems
Features
o Ultra-Low Supply Current: 5A (max)
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): 700V/mA (max)
o Line Regulation (V
OUT
+ 200mV) to 5.5V: 250V/V
(max)
o Four Output Voltage Options: 1.2V, 1.6V,
1.8V, 2.048V
MAX6018
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
*
IN
V
CC
OUT
REFERENCE
OUT
GND
MAX6018
*OPTIONAL
1
F, MAX*
Typical Application Circuit
19-2211; Rev 2; 12/02
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.
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX6018AEUR12-T -40C to +85C
3 SOT23-3
FZJH
MAX6018BEUR12-T -40C to +85C
3 SOT23-3
FZJI
MAX6018AEUR16-T -40C to +85C
3 SOT23-3
FZJJ
MAX6018BEUR16-T -40C to +85C
3 SOT23-3
FZJK
MAX6018AEUR18-T -40C to +85C
3 SOT23-3
FZJL
MAX6018BEUR18-T -40C to +85C
3 SOT23-3
FZJM
MAX6018AEUR21-T -40C to +85C
3 SOT23-3
FZJN
MAX6018BEUR21-T -40C to +85C
3 SOT23-3
FZJO
Selector Guide
PART
OUTPUT
VOLTAGE (V)
INITIAL
ACCURACY (%)
MAX6018AEUR12
1.263
0.2
MAX6018BEUR12
1.263
0.4
MAX6018AEUR16
1.600
0.2
MAX6018BEUR16
1.600
0.4
MAX6018AEUR18
1.800
0.2
MAX6018BEUR18
1.800
0.4
MAX6018AEUR21
2.048
0.2
MAX6018BEUR21
2.048
0.4
OUT
1
3
GND
IN
MAX6018
SOT23
TOP VIEW
2
Pin Configuration
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.
(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
= +70C)
3-Pin SOT23 (derate 4.0mW/C above +70C).............320mW
Operating Temperature Range ...........................-40C to +85C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
MAX6018
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
2
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (MAX6018_121.263V)
(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
= +25C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
MAX6018A_12 (0.2%)
1.2605
1.2630
1.2655
Output Voltage
V
OUT
MAX6018B_12 (0.4%)
1.2580
1.2630
1.2681
V
Output Voltage Temperature
Drift
TCV
OUT
(Note 2)
16
50
ppm/
o
C
Line Regulation
V
OUT
/
V
IN
1.8V
V
IN
5.5V
50
400
V/V
0
I
OUT
1mA
90
700
V/mA
Load Regulation
V
OUT
/
I
OUT
-100A
I
OUT
0
2
9
V/A
Sourcing to GND
3
Short-Circuit Current
I
SC
Sinking from V
IN
6
mA
Long-Term Stability
V
OUT
/
Time
1000hrs at T
A
= +25C
100
ppm
Thermal Hysteresis
(Note 4)
130
ppm
DYNAMIC CHARACTERISTICS
0.1Hz to 10Hz
45
Vp-p
Noise Voltage
e
OUT
10Hz to 10kHz
100
VRMS
Ripple Rejection
V
IN
= 1.8V 100mV (f = 120Hz)
85
dB
Turn-On Settling Time
t
R
Settling to 0.1%; C
OUT
= 5nF
200
s
Capacitive-Load Stability Range
C
OUT
(Note 2)
47
1000
nF
INPUT
Supply Voltage Range
V
IN
Guaranteed by Line Regulation Test
1.8
5.5
V
T
A
= +25C
3
5
Quiescent Supply Current
I
IN
T
A
= T
MIN
to T
MAX
3
6
A
Change in Quiescent Supply
Current vs. Input Voltage
I
IN
/
V
IN
1.8V
V
IN
5.5V
0.1
0.5
A/V
MAX6018
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (MAX6018_161.600V)
(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
= +25C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
MAX6018A_16 (0.2%)
T
A
= +25C
1.5968
1.6000
1.6032
Output Voltage
V
OUT
MAX6018B_16 (0.4%)
T
A
= +25C
1.5936
1.6000
1.6064
V
Output Voltage Temperature
Drift
TCV
OUT
(Note 2)
16
50
ppm/
o
C
Line Regulation
V
OUT
/
V
IN
1.8V
V
IN
5.5V
40
250
V/V
0
I
OUT
1mA
90
700
V/mA
Load Regulation
V
OUT
/
I
OUT
-750A
I
OUT
0
0.6
50
V/A
Dropout Voltage (Note 3)
V
IN
- V
OUT
I
OUT
= 1mA
100
200
mV
Sourcing to GND
6
Short-Circuit Current
I
SC
Sinking from V
IN
2
mA
Long-Term Stability
V
OUT
/
Time
1000hrs at T
A
= +25C
100
ppm
Thermal Hysteresis
(Note 4)
130
ppm
DYNAMIC CHARACTERISTICS
0.1Hz to 10Hz
40
Vp-p
Noise Voltage
e
OUT
10Hz to 10kHz
150
VRMS
Ripple Rejection
V
IN
= 1.8V 100mV (f = 120Hz)
85
dB
Turn-On Settling Time
t
R
Settling to 0.1%; C
OUT
= 5nF
200
s
Capacitive-Load Stability Range
C
OUT
(Note 2)
0.1
1000
nF
INPUT
Supply Voltage Range
V
IN
Guaranteed by Line Regulation Test
1.8
5.5
V
T
A
= +25C
3
5
Quiescent Supply Current
I
IN
T
A
= T
MIN
to T
MAX
3
6
A
Change in Quiescent Supply
Current vs. Input Voltage
I
IN
/
V
IN
1.8V
V
IN
5.5V
0.1
0.5
A/V
MAX6018
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (MAX6018_181.800V)
(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
= +25C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
MAX6018A_18 (0.2%)
T
A
= +25C
1.7964
1.8000
1.8036
Output Voltage
V
OUT
MAX6018B_18 (0.4%)
T
A
= +25C
1.7928
1.8000
1.8072
V
Output Voltage Temperature Drift
TCV
OUT
(Note 2)
16
50
ppm/
o
C
Line Regulation
V
OUT
/
V
IN
2.0V
V
IN
5.5V
40
275
V/V
0
I
OUT
1mA
90
800
V/mA
Load Regulation
V
OUT
/
I
OUT
-1mA
I
OUT
0
0.4
50
V/A
Dropout Voltage (Note 3)
V
IN
- V
OUT
I
OUT
= 1mA
100
200
mV
Sourcing to GND
7.5
Short-Circuit Current
I
SC
Sinking from V
IN
3
mA
Long-Term Stability
V
OUT
/
Time
1000hrs at T
A
= +25C
100
ppm
Thermal Hysteresis
(Note 4)
130
ppm
DYNAMIC CHARACTERISTICS
0.1Hz to 10Hz
45
Vp-p
Noise Voltage
e
OUT
10Hz to 10kHz
160
VRMS
Ripple Rejection
V
IN
= 2.0V 100mV (f = 120Hz)
85
dB
Turn-On Settling Time
t
R
Settling to 0.1%; C
OUT
= 5nF
200
s
Capacitive-Load Stability Range
C
OUT
(Note 2)
0.1
1000
nF
INPUT
Supply Voltage Range
V
IN
Guaranteed by Line Regulation Test
2.0
5.5
V
T
A
= +25C
3
5
Quiescent Supply Current
I
IN
T
A
= T
MIN
to T
MAX
3
6
A
Change in Quiescent Supply
Current vs. Input Voltage
I
IN
/
V
IN
2V
V
IN
5.5V
0.1
0.5
A/V
MAX6018
Precision, Micropower, 1.8V Supply,
Low-Dropout, SOT23 Voltage Reference
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (MAX6018_212.048V)
(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
= +25C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
MAX6018A_21 (0.2%)
T
A
= +25C
2.0439
2.0480
2.0521
Output Voltage
V
OUT
MAX6018B_21 (0.4%)
T
A
= +25C
2.0398
2.0480
2.0562
V
Output Voltage Temperature Drift
TCV
OUT
(Note 2)
16
50
ppm/
o
C
Line Regulation
V
OUT
/
V
IN
2.25V
V
IN
5.5V
45
330
V/V
0
I
OUT
1mA
90
1000
V/mA
Load Regulation
V
OUT
/
I
OUT
-1mA
I
OUT
0
0.3
50
V/A
Dropout Voltage (Note 3)
V
IN
- V
OUT
I
OUT
= 1mA
100
200
mV
Sourcing to GND
10
Short-Circuit Current
I
SC
Sinking from V
IN
4
mA
Long-Term Stability
V
OUT
/
Time
1000hrs at T
A
= +25C
100
ppm
Thermal Hysteresis
(Note 4)
130
ppm
DYNAMIC CHARACTERISTICS
0.1Hz to 10Hz
50
Vp-p
Noise Voltage
e
OUT
10Hz to 10kHz
175
VRMS
Ripple Rejection
V
IN
= 2.25V 100mV (f = 120Hz)
85
dB
Turn-On Settling Time
t
R
Settling to 0.1%; C
OUT
= 5nF
200
s
Capacitive-Load Stability Range
C
OUT
(Note 2)
0.1
1000
nF
INPUT
Supply Voltage Range
V
IN
Guaranteed by Line Regulation Test
2.25
5.5
V
T
A
= +25C
3
5
Quiescent Supply Current
I
IN
T
A
= T
MIN
to T
MAX
3
6
A
Change in Quiescent Supply
Current vs. Input Voltage
I
IN
/
V
IN
2.25V
V
IN
5.5V
0.1
0.5
A/V
Note 1: Devices are 100% production tested at T
A
= +25C 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
= +25C output voltage before and after temperature cycling of the device
(from T
A
= T
MIN
to T
MAX
). Initial measurement at T
A
= +25C is followed by temperature cycling the device to T
A
= +85C
then to T
A
= -40C and another measurement at T
A
= +25C is compared to the original measurement at T
A
= +25C.
PDF 
ZIP