General Description
The MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/
MAX6045/MAX6050 precision, low-dropout, micropower
voltage references are available in miniature SOT23-3
surface-mount packages. They feature a proprietary
curvature-correction circuit and laser-trimmed thin-film
resistors that result in a low temperature coefficient of
<15ppm/°C and initial accuracy of better than 0.2%.
These devices are specified over the extended temperature range.
These series-mode voltage references draw only 27µA
of quiescent supply current and can sink or source up
to 500µA of load current. Unlike conventional shuntmode (two-terminal) references that waste supply current and require an external resistor, devices in the
MAX6012 family offer a supply current that’s virtually
independent of supply voltage (with only a 0.8µA/V variation with supply voltage) and do not require an external
resistor. Additionally, these internally compensated
devices do not require an external compensation
capacitor and are stable with up to 2.2nF of load capacitance. Eliminating the external compensation capacitor
saves valuable board area in space-critical applications.
Their low dropout voltage and supply-independent,
ultra-low supply current make these devices ideal for
battery-operated, low-voltage systems.
Applications
Hand-Held Equipment
Data Acquisition Systems
Industrial and Process-Control Systems
Battery-Operated Equipment
Hard-Disk Drives
Features
♦ 0.2% (max) Initial Accuracy
♦ 15ppm/°C (max) Temperature Coefficient
♦ 35µA (max) Quiescent Supply Current
♦ 0.8µA/V Supply Current Variation with V
IN
♦ ±500µA Output Source and Sink Current
♦ 100mV Dropout at 500µA Load Current
♦ 0.12µV/µA Load Regulation
♦ 8µV/V Line Regulation
♦ Stable with C
LOAD
= 0 to 2.2nF
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
________________________________________________________________ Maxim Integrated Products 1
Typical Operating Circuit
19-4777; Rev 3; 4/01
PART
MAX6012AEUR-T
MAX6012BEUR-T
MAX6021AEUR-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-
PACKAGE
3 SOT23-3
3 SOT23-3
3 SOT23-3
Ordering Information
TOP
MARK
FZAP
FZDA
FZAU
MAX6021BEUR-T
MAX6025AEUR-T
MAX6025BEUR-T -40°C to +85°C
-40°C to +85°C
-40°C to +85°C 3 SOT23-3
3 SOT23-3
3 SOT23-3
FZDF
FZAQ
FZDB
MAX6041AEUR-T
MAX6041BEUR-T -40°C to +85°C
-40°C to +85°C 3 SOT23-3
3 SOT23-3
FZAR
FZDC
Pin Configuration appears at end of data sheet.
(V
OUT
+ 200mV) to 12.65.000MAX6050
(V
OUT
+ 200mV) to 12.64.500
(V
OUT
+ 200mV) to 12.64.096MAX6041
MAX6045
(V
OUT
+ 200mV) to 12.62.500MAX6025
2.5 to 12.62.048
2.5 to 12.61.247MAX6012
MAX6021
INPUT VOLTAGE (V)
OUTPUT
VOLTAGE (V)
PART
Selector Guide
MAX6045AEUR-T
-40°C to +85°C 3 SOT23-3 FZAS
MAX6045BEUR-T -40°C to +85°C 3 SOT23-3 FZDD
MAX6050AEUR-T
-40°C to +85°C 3 SOT23-3 FZAT
MAX6050BEUR-T -40°C to +85°C 3 SOT23-3 FZDE
MAX6030AEUR-T
-40°C to +85°C 3 SOT23-3 FZDW
MAX6030BEUR-T -40°C to +85°C 3 SOT23-3 FZDX
(V
OUT
+ 200mV) to 12.63.000MAX6030
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+SUPPLY INPUT (SEE SELECTOR GUIDE)
IN
OUT REFERENCE
MAX6012
*
MAX6021
MAX6025
MAX6030
MAX6041
MAX6045
MAX6050
GND
2.2nF MAX*
*CAPACITORS ARE OPTIONAL
OUT
TA= 0°C to +70°C
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX6012
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
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)
IN .........................................................................-0.3V to +13.5V
OUT .............................................................-0.3V to (VIN+ 0.3V)
Output Short Circuit to GND or IN (VIN< 6V) ............Continuous
Output Short Circuit to GND or IN (V
IN
≥ 6V) .........................60s
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SOT23-3 (derate 4.0mW/°C above +70°C) ........320mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
2.5V ≤ VIN≤ 12.6V
Guaranteed by line-regulation test
TA= +25°C
Note 4
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
Short to IN
f = 10Hz to 10kHz
f = 0.1Hz to 10Hz
Short to GND
Sinking: -500µA ≤ I
OUT
≤ 0
TA= 0°C to +70°C
TA= 0°C to +70°C
2.5V ≤ VIN≤ 12.6V
Sourcing: 0 ≤ I
OUT
≤ 500µA
1000hr at TA= +25°C
CONDITIONS
µA/V0.8 2.0IIN/V
IN
Change in Supply Current
µA27 35I
IN
Quiescent Supply Current
V2.5 12.6V
IN
Supply Voltage Range
nF0 2.2C
OUT
Capacitive-Load Stability Range
µs30t
R
Turn-On Settling Time
dB86
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
65
µVp-p12
e
OUT
Noise Voltage
ppm/
1000hr
50
∆V
OUT
/
time
Long-Term Stability
1.241 1.247 1.253
V1.243 1.247 1.251
V
OUT
Output Voltage
ppm130
Temperature Hysteresis
(Note 3)
4
mA
4
I
SC
OUT Short-Circuit Current
0.15 0.60
615
625
µV/V880
∆V
OUT
/
∆V
IN
Line Regulation
0.12 0.50
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX6012A
MAX6012B
ppm/°C
V
OUT
Output Voltage Temperature
Coefficient (Note 2)
∆V
OUT
/
∆I
OUT
Load Regulation µV/µA
-0.32 0.32
-0.48 0.48
TA= -40°C to +85°C
TA= -40°C to +85°C
MAX6012A
MAX6012B
620
630
%
V
%
OUTPUT
DYNAMIC
INPUT
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—MAX6021
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
2.5V ≤ VIN≤ 12.6V
Guaranteed by line-regulation test
TA= +25°C
Note 4
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
Short to IN
f = 10Hz to 10kHz
f = 0.1Hz to 10Hz
Short to GND
Sinking: -500µA ≤ I
OUT
≤ 0
TA= 0°C to +70°C
TA= 0°C to +70°C
2.5V ≤ VIN≤ 12.6V
Sourcing: 0 ≤ I
OUT
≤ 500µA
1000hr at TA= +25°C
CONDITIONS
µA/V0.8 2.0IIN/V
IN
Change in Supply Current
µA27 35I
IN
Quiescent Supply Current
V2.5 12.6V
IN
Supply Voltage Range
nF02.2C
OUT
Capacitive-Load Stability Range
µs70t
R
Turn-On Settling Time
dB84
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
105
µVp-p35
e
OUT
Noise Voltage
ppm/
1000hr
50
∆V
OUT
/
time
Long-Term Stability
2.040 2.048 2.056
V2.043 2.048 2.053
V
OUT
Output Voltage
ppm130
Temperature Hysteresis
(Note 3)
4
mA
4
I
SC
OUT Short-Circuit Current
0.18 0.70
615
625
µV/V10 100
∆V
OUT
/
∆V
IN
Line Regulation
0.12 0.55
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX6021A
MAX6021B
V
OUT
Output Voltage Temperature
Coefficient (Note 2)
ppm/°C
∆V
OUT
/
∆I
OUT
Load Regulation µV/µA
MAX6021A
MAX6021B
-0.24 0.24
-0.39 0.39
TA= -40°C to +85°C
TA= -40°C to +85°C
620
630
V
%
%
OUTPUT
DYNAMIC
INPUT
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX6025
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
Guaranteed by line-regulation test
TA= +25°C
Note 4
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
f = 10Hz to 10kHz
Short to IN
Short to GND
f = 0.1Hz to 10Hz
I
OUT
= 500µA
Sinking: -500µA ≤ I
OUT
≤ 0
TA= 0°C to +70°C
TA= 0°C to +70°C
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
1000hr at TA= +25°C
Sourcing: 0 ≤ I
OUT
≤ 500µA
CONDITIONS
µA/V0.8 2.0IIN/V
IN
Change in Supply Current
µA27 35I
IN
Quiescent Supply Current
VV
OUT
+ 0.2 12.6V
IN
Supply Voltage Range
nF02.2C
OUT
Capacitive-Load Stability Range
µs85t
R
Turn-On Settling Time
dB82
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
125
µVp-p50
e
OUT
Noise Voltage
ppm/
1000hr
50
∆V
OUT
/
time
Long-Term Stability
ppm130
∆V
OUT
/
time
Temperature Hysteresis
(Note 3)
2.490 2.500 2.510
V2.495 2.500 2.505
V
OUT
Output Voltage
4
mA
4
I
SC
OUT Short-Circuit Current
mV100 200
VIN-
V
OUT
Dropout Voltage
(Note 5)
0.18 0.80
615
625
µV/V15 140
∆V
OUT
/
∆V
IN
Line Regulation
0.14 0.60
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX6025A
MAX6025B
V
OUT
ppm/°C
Output Voltage Temperature
Coefficient (Note 2)
∆V
OUT
/
∆I
OUT
Load Regulation µV/µA
MAX6025A
MAX6025B
TA= -40°C to +85°C
TA= -40°C to +85°C
-0.20 0.20
-0.40 0.40
620
630
V
%
%
OUTPUT
DYNAMIC
INPUT
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
_______________________________________________________________________________________ 5
V
OUT
Output Voltage Temperature
Coefficient (Note 2)
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
∆V
OUT
/
∆I
OUT
Guaranteed by line-regulation test
TA= +25°C
Note 4
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
Short to IN
f = 10Hz to 10kHz
f = 0.1Hz to 10Hz
Short to GND
Sinking: -500µA ≤ I
OUT
≤ 0
TA= 0°C to +70°C
TA= 0°C to +70°C
(V
OUT
) +0.2V) ≤ VIN≤ 12.6V
Sourcing: 0 ≤ I
OUT
≤ 500µA
1000hr at TA= +25°C
CONDITIONS
ppm/°C
Load Regulation µV/µA
µA/V0.8 2.0IIN/V
IN
Change in Supply Current
µA27 35I
IN
Quiescent Supply Current
VV
OUT
+ 0.2 12.6V
IN
Supply Voltage Range
nF02.2C
OUT
Capacitive-Load Stability Range
µs100t
R
Turn-On Settling Time
dB80
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
150
µVp-p65
e
OUT
Noise Voltage
ppm/
1000hr
50
∆V
OUT
/
time
Long-Term Stability
2.988 3.000 3.012
V2.994 3.000 3.006
V
OUT
Output Voltage
ppm130
Temperature Hysteresis
(Note 3)
4
mA
4
I
SC
OUT Short-Circuit Current
0.18 0.80
615
625
µV/V20 150
∆V
OUT
/
∆V
IN
Line Regulation
0.14 0.60
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX6030A
MAX6030B
ELECTRICAL CHARACTERISTICS—MAX6030
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
VIN-
V
OUT
I
OUT
= 500µA
Dropout Voltage
(Note 5)
mV100 200
MAX6030A
MAX6030B
%
V
%-0.20 0.20
-0.40 0.40
TA= -40°C to +85°C
TA= -40°C to +85°C 620
630
OUTPUT
DYNAMIC
INPUT
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX6041
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
Guaranteed by line-regulation test
TA= +25°C
Note 4
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ± 100mV, f = 120Hz
f = 10Hz to 10kHz
Short to IN
Short to GND
f = 0.1 Hz to 10Hz
I
OUT
= 500µA
Sourcing: 0 ≤ I
OUT
≤ 500µA
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
1000hr at TA= +25°C
1000hr at TA= +25°C
CONDITIONS
µA/V0.8 2.0IIN/V
IN
Change in Supply Current
µA27 35I
IN
Quiescent Supply Current
VV
OUT
+ 0.2 12.6V
IN
Supply Voltage Range
INPUT
nF02.2C
OUT
Capacitive-Load Stability Range
µs160t
R
Turn-On Settling Time
dB77
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
200
µVp-p100
e
OUT
Noise Voltage
DYNAMIC
ppm/
1000hr
50
∆V
OUT
/
time
Long-Term Stability
ppm130
∆V
OUT
/
time
Temperature Hysteresis
(Note 3)
4.080 4.096 4.112
V4.088 4.096 4.104
V
OUT
OUTPUT
Output Voltage
4
mA
4
I
SC
OUT Short-Circuit Current
mV100 200
VIN-
V
OUT
Dropout Voltage
(Note 5)
0.15 0.70
ppm/°CV
OUT
Output Voltage Temperature
Coefficient (Note 2)
615
µV/V25 160
∆V
OUT
/
∆V
IN
Line Regulation
µV/µA
∆V
OUT
/
∆I
OUT
Load Regulation
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX6041A
MAX6041B
TA= 0°C to +70°C
625TA= 0°C to +70°C
Sinking: -500µA ≤ I
OUT
≤ 0 0.20 0.90
%
V
%
MAX6041A
MAX6041B
620
630TA= -40°C to +85°C
TA= -40°C to +85°C
-0.20 0.20
-0.39 0.39
OUTPUT
DYNAMIC
INPUT
OUTPUT
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
_______________________________________________________________________________________ 7
ELECTRICAL CHARACTERISTICS—MAX6045
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
Guaranteed by line-regulation test
TA= +25°C
Note 4
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
f = 10Hz to 10kHz
Short to IN
Short to GND
f = 0.1Hz to 10Hz
I
OUT
= 500µA
TA= 0°C to +70°C
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
1000hr at TA= +25°C
Sourcing: 0 ≤ I
OUT
≤ 500µA
CONDITIONS
µA/V0.8 2.0IIN/V
IN
Change in Supply Current
µA27 35I
IN
Quiescent Supply Current
VV
OUT
+ 0.2 12.6V
IN
Supply Voltage Range
nF0 2.2C
OUT
Capacitive-Load Stability Range
µs180t
R
Turn-On Settling Time
dB76
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
215
µVp-p110
e
OUT
Noise Voltage
ppm/
1000hr
50
∆V
OUT
/
time
Long-Term Stability
ppm130
∆V
OUT
/
time
Temperature Hysteresis
(Note 3)
4.482 4.500 4.518
V4.491 4.500 4.509
V
OUT
Output Voltage
4
mA
4
I
SC
OUT Short-Circuit Current
mV100 200
VIN-
V
OUT
Dropout Voltage
(Note 5)
0.16 0.80
ppm/°CV
OUT
615
Output Voltage Temperature
Coefficient (Note 2)
µV/V25 160
∆V
OUT
/
∆V
IN
Line Regulation
µV/µA
∆V
OUT
/
∆I
OUT
Load Regulation
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX6045A
MAX6045B
625TA= 0°C to +70°C
Sinking: -500µA ≤ I
OUT
≤ 0 0.22 1.00
MAX6045A
MAX6045B
%
V
%
TA= -40°C to +85°C
TA= -40°C to +85°C
-0.20 0.20
-0.40 0.40
620
630
OUTPUT
DYNAMIC
INPUT
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
8 _______________________________________________________________________________________
Note 1: All devices are 100% production tested at TA= +25°C and are guaranteed by design for TA= T
MIN
to T
MAX
, as specified.
Note 2: Temperature Coefficient is measured by the “box” method, i.e., the maximum ∆V
OUT
is divided by the maximum ∆t.
Note 3: Temperature Hysteresis is defined as the change in +25°C output voltage before and after cycling the device from T
MIN
to T
MAX
.
Note 4: Not production tested. Guaranteed by design.
Note 5: Dropout voltage is the minimum input voltage at which V
OUT
changes ≤0.2% from V
OUT
at VIN= 5.0V (VIN= 5.5V for MAX6050).
ELECTRICAL CHARACTERISTICS—MAX6050
(VIN= +5.5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
Guaranteed by line-regulation test
TA= +25°C
Note 4
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
f =10Hz to 10kHz
Short to IN
Short to GND
f = 0.1 Hz to 10Hz
I
OUT
= 500µA
Sourcing: 0 ≤ I
OUT
≤ 500µA
TA= 0°C to +70°C
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
1000hr at TA= +25°C
CONDITIONS
µA/V0.8 2.0IIN/V
IN
Change in Supply Current
µA27 35I
IN
Quiescent Supply Current
VV
OUT
+ 0.2 12.6V
IN
Supply Voltage Range
nF0 2.2C
OUT
Capacitive-Load Stability Range
µs220t
R
Turn-On Settling Time
dB72
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
240
µVp-p120
e
OUT
Noise Voltage
ppm/
1000hr
50
∆V
OUT
/
time
Long-Term Stability
ppm130
Temperature Hysteresis
(Note 3)
4.980 5.000 5.020
V4.990 5.000 5.010
V
OUT
OUTPUT
Output Voltage
4
mA
4
I
SC
OUT Short-Circuit Current
mV100 200
VIN-
V
OUT
Dropout Voltage
(Note 5)
0.17 0.85
ppm/°CTCV
OUT
Output Voltage Temperature
Coefficient (Note 2)
615
µV/V25 160
∆V
OUT
/
∆VIN
Line Regulation
µV/µA
∆V
OUT
/
∆I
OUT
Load Regulation
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX6050A
MAX6050B
TA= 0°C to +70°C 625
Sinking: -500µA ≤ I
OUT
≤ 0 0.24 1.10
%
V
%
MAX6050A
MAX6050B
TA= -40°C to +85°C
TA= -40°C to +85°C
-0.20 0.20
-0.40 0.40
620
630
DYNAMIC
INPUT
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
_______________________________________________________________________________________ 9
Typical Operating Characteristics
(VIN= +5V for MAX6012/21/25/30/41/45, VIN= +5.5V for MAX6050; I
OUT
= 0; TA= +25°C; unless otherwise noted.) (Note 6)
1.2470
1.2480
1.2475
1.2490
1.2485
1.2505
1.2500
1.2495
1.2510
-40 0-20 20406080100
MAX6012
OUTPUT VOLTAGE
TEMPERATURE DRIFT
MAX6012-01
TEMPERATURE DRIFT (°C)
V
OUT
(V)
THREE
TYPICAL PARTS
4.986
4.990
4.988
4.996
4.994
4.992
5.002
5.000
4.998
5.004
-40 0 20-20 40 60 80 100
MAX6050
OUTPUT VOLTAGE
TEMPERATURE DRIFT
MAX6012-02
TEMPERATURE DRIFT (°C)
V
OUT
(V)
THREE
TYPICAL PARTS
4.993
4.995
4.994
4.999
4.998
4.997
4.996
5.002
5.001
5.000
5.003
0300
400
500100 200 600 700 800 900 1000
MAX6050
LONG-TERM DRIFT
MAX6012-03
TIME (h)
OUTPUT VOLTAGE (V)
THREE
TYPICAL PARTS
-100
0
200
100
300
400
264 8 10 12 14
MAX6012
LINE REGULATION
MAX6012-04
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (µV)
TA = +85°C
TA = -40°C
TA = +25°C
-0.4
-0.2
0
0.2
0.4
-500 -250 0 250-375 -125 125 375 500
MAX6012
LOAD REGULATION
MAX6012-07
LOAD CURRENT (µA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +85°C
TA = -40°C
TA = +25°C
-200
0
400
200
600
800
5791113
MAX6050
LINE REGULATION
MAX6012-05
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (µV)
TA = +85°C
TA = -40°C
TA = +25°C
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 200 400 600 800 1000
MAX6025/MAX6030
DROPOUT VOLTAGE vs.
SOURCE CURRENT
MAX6012-06
SOURCE CURRENT (µA)
DROPOUT VOLTAGE (V)
TA = +85°C
TA = -40°C
TA = +25°C
-0.400
-0.200
0
0.200
0.400
-500 -250 0 250-375 -125 125 375 500
MAX6050
LOAD REGULATION
MAX6012-08
LOAD CURRENT (µA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +85°C
TA = -40°C
TA = +25°C
0
0.10
0.05
0.20
0.15
0.25
0.30
0400200 600 800 1000
MAX6041/MAX6045/MAX6050
DROPOUT VOLTAGE vs.
SOURCE CURRENT
MAX6012-09
SOURCE CURRENT (µA)
DROPOUT VOLTAGE (V)
TA = +85°C
TA = -40°C
TA = +25°C
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VIN= +5V for MAX6012/21/25/30/41/45, VIN= +5.5V for MAX6050; I
OUT
= 0; TA= +25°C; unless otherwise noted.) (Note 6)
V
OUT
10µV/div
1sec/div
MAX6012
0.1Hz TO 10Hz OUTPUT NOISE
MAX6012-16
100
10
1
PSR (mV/V)
0.1
0.01
100 1k 10k 100k 1M 10M
1k
MAX6012
POWER-SUPPLY REJECTION
vs. FREQUENCY
FREQUENCY (Hz)
MAX6012
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX6012-10
MAX6050
POWER-SUPPLY REJECTION
vs. FREQUENCY
100
VCC = 5.5V ±0.25V
10
1
PSR (mV/V)
0.1
0.01
10 10k 100k 1M100 1k 10M
FREQUENCY (Hz)
MAX6050
OUTPUT IMPEDANCE
vs. FREQUENCY
1k
40
VALID OVER SPECIFIED
38
V
MAX16012-11
IN
FOR EACH PART
36
34
32
30
28
26
SUPPLY CURRENT (µA)
24
22
20
264 8 10 12 14
40
SUPPLY CURRENT
vs. INPUT VOLTAGE
(MIN) TO VIN (MAX)
INPUT VOLTAGE (V)
SUPPLY CURRENT
vs. TEMPERATURE
MAX6012-12
MAX6012-14
35
30
SUPPLY CURRENT (µA)
25
20
VIN = 2.5V (MAX6012/MAX6025 ONLY)
-40 20 40-20 0 60 80 100
TEMPERATURE (°C)
MAX6012
TURN-ON TRANSIENT
100
10
OUTPUT IMPEDANCE (Ω)
1
0.1
0.01 100 10k10.1 10 1k 100k 1M
FREQUENCY (Hz)
MAX6012-13
100
10
OUTPUT IMPEDANCE (Ω)
1
0.1
0.01 100 10k10.1 10 1k 100k 1M
FREQUENCY (Hz)
MAX6050
0.1Hz TO 10Hz OUTPUT NOISE
MAX6012-17
V
IN
1V/div
V
OUT
20µV/div
V
OUT
1V/div
MAX6012-15
VIN = 12.5V
VIN = 7.5V
VIN = 5.5V
MAX6012-18
1sec/div
10µs/div
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
______________________________________________________________________________________ 11
Typical Operating Characteristics (continued)
(VIN= +5V for MAX6012/21/25/30/41/45, VIN= +5.5V for MAX6050; I
OUT
= 0; TA= +25°C; unless otherwise noted.) (Note 6)
I
OUT
40µA/div
+25µA
-25µA
V
OUT
20mV/div
10µs/div
MAX6012
LOAD-TRANSIENT RESPONSE
MAX6012-19
I
OUT
= ±25µA, AC-COUPLED
I
OUT
50µA/div
V
OUT
50mV/div
20µs/div
MAX6050
LOAD-TRANSIENT RESPONSE
MAX6012-20
VIN = 5.5V, I
OUT
= ±25µA, AC-COUPLED
V
IN
2V/div
V
OUT
2V/div
10µs/div
MAX6050
TURN-ON TRANSIENT
MAX6012-21
+500µA
-500µA
V
OUT
0.2V/div
I
OUT
1mA/div
10µs/div
MAX6012
LOAD-TRANSIENT RESPONSE
MAX6012-22
I
OUT
= ±500µA, AC-COUPLED
V
IN
200mV/div
V
OUT
100mV/div
2µs/div
V
IN
= 5.5V ±0.25V, AC-COUPLED
MAX6050
LINE-TRANSIENT RESPONSE
MAX6012-25
I
OUT
500µA/div
V
OUT
200mV/div
20µs/div
MAX6050
LOAD-TRANSIENT RESPONSE
MAX6012-23
VIN = 5.5V, I
OUT
= ±500µA, AC-COUPLED
V
IN
200mV/div
V
OUT
100mV/div
2.5µs/div
V
IN
= 5V ±0.25V, AC-COUPLED
MAX6012
LINE-TRANSIENT RESPONSE
MAX6012-24
Note 6: Many of the Typical Operating Characteristics of the MAX6012 family are
extremely similar. The extremes of these characteristics are found in the
MAX6012 (1.2V output) and the MAX6050 (5.0V output). The Typical
Operating Characteristics of the remainder of the MAX6012 family typically
lie between these two extremes and can be estimated based on their output
voltage.
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
12 ______________________________________________________________________________________
Detailed Description
The MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/
MAX6045/MAX6050 precision bandgap references use
a proprietary curvature-correction circuit and lasertrimmed thin-film resistors, resulting in a low temperature coefficient of <20ppm/°C and initial accuracy of
better than 0.2%. These devices can sink and source
up to 500µA with <200mV of dropout voltage, making
them attractive for use in low-voltage applications.
Applications Information
Output/Load Capacitance
Devices in this family do not require an output capacitance for frequency stability. They are stable for capacitive loads from 0 to 2.2nF. However, in applications
where the load or the supply can experience step
changes, an output capacitor will reduce the amount of
overshoot (or undershoot) and assist the circuit’s transient response. Many applications do not need an
external capacitor, and this family can offer a significant advantage in these applications when board
space is critical.
Supply Current
The quiescent supply current of these series-mode references is a maximum of 35µA and is virtually independent of the supply voltage, with only a 0.8µA/V variation
with supply voltage. Unlike series references, shuntmode references operate with a series resistor connected to the power supply. The quiescent current of a
shunt-mode reference is thus a function of the input
voltage. Additionally, shunt-mode references have to
be biased at the maximum expected load current, even
if the load current is not present all the time. The load
current is drawn from the input voltage only when
required, so supply current is not wasted and efficiency
is maximized at all input voltages. This improved efficiency can help reduce power dissipation and extend
battery life.
When the supply voltage is below the minimum specified input voltage (as during turn-on), the devices can
draw up to 200µA beyond the nominal supply current.
The input voltage source must be capable of providing
this current to ensure reliable turn-on.
Output Voltage Hysteresis
Output voltage hysteresis is the change in the output
voltage at TA= +25°C before and after the device is
cycled over its entire operating temperature range.
Hysteresis is caused by differential package stress
appearing across the bandgap core transistors. The
typical temperature hysteresis value is 130ppm.
Pin Description
NAME FUNCTION
1 IN Supply Voltage Input
2 OUT Reference Voltage Output
PIN
3 GND Ground
Figure 1. Positive and Negative References from Single +3V or +5V Supply
IN
V
S
+2V
S
-2V
S
OUT
+REF OUTPUT
OUTPUT
-REF OUTPUT
10nF
1MΩ
0.1%
1MΩ
0.1%
GND
MAX6012
MAX6021
MAX6025
MAX6030
MAX6041
MAX6045
MAX6050
V
CC
V+
GND
MAX681
V-
V+
V-
ICL7652
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
______________________________________________________________________________________ 13
Pin Configuration
Chip Information
TRANSISTOR COUNT: 70
Turn-On Time
These devices typically turn on and settle to within
0.1% of their final value; 30µs to 220µs depending on
the device. The turn-on time can increase up to 1.5ms
with the device operating at the minimum dropout voltage and the maximum load.
Positive and Negative Low-Power
Voltage Reference
Figure 1 shows a typical method for developing a bipolar reference. The circuit uses a MAX681 voltage doubler/inverter charge-pump converter to power an
ICL7652, thus creating a positive as well as a negative
reference voltage.
TOP VIEW
1
IN
OUT
2
MAX6012
MAX6021
MAX6025
MAX6030
MAX6041
MAX6045
MAX6050
SOT23-3
3 GND
MAX6012/6021/6025/6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
Package Information
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
SOTPO3L.EPS
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