19-3192; Rev 0; 2/04
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
MAX6037
General Description
The MAX6037 family of low-dropout, micropower volt-
age references offer fixed and adjustable output volt-
age options ranging from 1.184V to 5V. Connect an
external resistive-divider on the MAX6037_ADJ to
adjust the output voltage from 1.184V to 5V. The other
devices in the MAX6037 family feature fixed output volt-
ages of 1.25V, 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V.
The MAX6037 offers shutdown functionality with an
active-low shutdown (500nA, max).
These series-mode voltage references operate from a
2.5V to 5.5V supply and consume 275µA (max) quies-
cent current. The output is stable driving loads from
0.02µF to 1µF and can source and sink 5mA of load
current. The MAX6037 offers a low temperature coeffi-
cient of 25ppm/°C and initial accuracy of ±0.2% (max).
The low dropout voltage (100mV, max at 1mA) and
supply-independent, low supply current make the
MAX6037 ideal for battery-powered applications.
The MAX6037 is available in the miniature 5-pin SOT23
package and is specified over the -40°C to +125°C
automotive temperature range.
♦
Adjustable V
OUT
: 1.184V to 5V
♦
Fixed Outputs: 1.25V, 2.048V, 2.5V, 3.0V, 3.3V,
and 4.096V
♦
Shutdown Current <500nA (max)
♦
25ppm/°C (max) Temperature Coefficient (A Grade)
♦
±0.2% (max) Initial Accuracy (A Grade)
♦
Low 100mV (max) Dropout Voltage at 1mA Load
Current
♦
2.5V to 5.5V Input Voltage Range
♦
5mA Sink and Source Current Capability
♦
Available in 5-Pin SOT23 Package
♦
Operates Over the Automotive Temperature
Range: -40°C to +125°C
Features
Selector Guide
PART
MAX6037AAUK12
MAX6037BAUK12
MAX6037CAUK12
MAX6037AAUK21
MAX6037BAUK21
MAX6037CAUK21
MAX6037AAUK25
MAX6037BAUK25
MAX6037CAUK25
MAX6037AAUK30
MAX6037BAUK30
MAX6037CAUK30
MAX6037AAUK33
MAX6037BAUK33
MAX6037CAUK33
MAX6037AAUK41
MAX6037BAUK41
MAX6037CAUK41
MAX
INITIAL
OUTPUT
TEMPCO ACCURACY
VOLTAGE (V)
(ppm/°C)
(%, max)
1.25
1.25
1.25
2.048
2.048
2.048
2.5
2.5
2.5
3.0
3.0
3.0
3.3
3.3
3.3
4.096
4.096
4.096
25
50
50
25
50
50
25
50
50
25
50
50
25
50
50
25
50
50
25
50
50
0.2
0.3
0.5
0.2
0.3
0.5
0.2
0.3
0.5
0.2
0.3
0.5
0.2
0.3
0.5
0.2
0.3
0.5
0.2
0.3
0.5
Applications
Medical Equipment
Wireless LAN
Portable Equipment
Precision Regulators
Ordering Information
PART
MAX6037AAUK12-T
MAX6037BAUK12-T
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
PIN-
TOP
PACKAGE MARK
5 SOT23-5
5 SOT23-5
AEIV
AEIW
AEIX
MAX6037CAUK12-T -40°C to +125°C 5 SOT23-5
Ordering Information continued at end of data sheet.
Typical Operating Circuit
2.5V TO 5.5V INPUT
IN
OUT
REFERENCE
OUTPUT
*
* OPTIONAL
MAX6037
SHDN
GND
0.02µF
TO 1µF
MAX6037AAUKADJ* 1.184 to 5, adj
MAX6037BAUKADJ* 1.184 to 5, adj
MAX6037CAUKADJ* 1.184 to 5, adj
Pin Configuration appears at end of data sheet.
*The
accuracy of the MAX6037_ADJ is dependent on the
accuracy of the external resistors. Use 1% resistors with low
temperature coefficient for best overall accuracy.
1
________________________________________________________________
Maxim Integrated Products
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.
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
MAX6037
ABSOLUTE MAXIMUM RATINGS
IN, OUT,
SHDN,
ADJ to GND...................................-0.3V to +6V
Output Short Circuit to GND or IN............................. Continuous
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
Operating Temperature Range .........................-40°C to +125°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—MAX6037_12 (V
OUT
= 1.25V)
(V
IN
= V
SHDN
= +3V, I
OUT
= 0, C
OUT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
MAX6037A_12 (0.2%)
Output Voltage
Output-Voltage Temperature
Coefficient (Note 2)
Line Regulation
V
OUT
T
A
= +25°C
MAX6037A_12
MAX6037B/C_12
2.5V
≤
V
IN
≤
5.5V
Sourcing: 0
≤
I
OUT
≤
1mA
Load Regulation
∆V
OUT
/∆I
OUT
Sourcing: 1mA
≤
I
OUT
≤
5mA
Sinking: -1mA
≤
I
OUT
≤
0
Sinking: -5mA
≤
I
OUT
≤
-1mA
OUT Short-Circuit Current
Thermal Hysteresis (Note 3)
Long-Term Stability
DYNAMIC
Noise Voltage
e
OUT
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To V
OUT
= 0.1%
of final value,
C
OUT
= 0.02µF
Initial power-up
V
IN
= 3V,
SHDN
pulled
from low to high
6
15
360
75
125
0.02
1
µs
µV
P-P
µV
RMS
I
SC
∆V
OUT
/cycle
∆V
OUT
/time
1000h at T
A
= +25°C
Short to GND
Short to IN
MAX6037B_12 (0.3%)
MAX6037C_12 (0.5%)
TCV
OUT
∆V
OUT
/∆V
IN
1.2475
1.2462
1.2438
1.250
1.250
1.250
6
6
0.0006
0.008
0.006
0.025
0.014
16
32
485
133
1.2525
1.2538
1.2563
25
50
0.0096
0.072
0.072
0.12
0.12
mA
ppm
ppm
%/mA
ppm/°C
%/V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Turn-On Settling Time
Output Impedance when
Disabled
Capacitive-Load Stability
Range (Note 4)
INPUT
Supply Voltage Range
Quiescent Supply Current
Shutdown Supply Current
t
R
Z
OUT
C
OUT
V
IN
= 3V, V
SHDN
= 0V
kΩ
µF
V
IN
I
IN
I
SHDN
Guaranteed by line regulation test
V
SHDN
= 0V
2.5
190
0.05
5.5
275
500
V
µA
nA
2
_______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS—MAX6037_12 (V
OUT
= 1.25V) (continued)
(V
IN
= V
SHDN
= +3V, I
OUT
= 0, C
OUT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SHUTDOWN (SHDN)
Logic-High Input Voltage
Logic-Low Input Voltage
Logic-High Input Current
Logic-Low Input Current
V
ENH
V
ENL
I
ENH
I
ENL
2.5V
≤
V
IN
≤
5.5V
2.5V
≤
V
IN
≤
5.5V
2.5V
≤
V
IN
≤
5.5V, V
SHDN
= V
IN
2.5V
≤
V
IN
≤
5.5V, V
SHDN
= 0V
-1000
-1000
0.15
0.05
2.0
0.7
+1000
+1000
V
V
nA
nA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6037
ELECTRICAL CHARACTERISTICS—MAX6037_21 (V
OUT
= 2.048V)
(V
IN
= V
SHDN
= +3V, I
OUT
= 0, C
OUT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
MAX6037A_21 (0.2%)
Output Voltage
Output-Voltage Temperature
Coefficient (Note 2)
Line Regulation
V
OUT
T
A
= +25°C
MAX6037A_21
MAX6037B/C_21
2.5V
≤
V
IN
≤
5.5V
Sourcing: 0
≤
I
OUT
≤
1mA
Load Regulation
∆V
OUT
/∆I
OUT
Sourcing: 1mA
≤
I
OUT
≤
5mA
Sinking: -1mA
≤
I
OUT
≤
0
Sinking: -5mA
≤
I
OUT
≤
-1mA
OUT Short-Circuit Current
Thermal Hysteresis (Note 3)
Long-Term Stability
DYNAMIC
Noise Voltage
e
OUT
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To V
OUT
= 0.1%
of final value,
C
OUT
= 0.02µF
Initial power-up
V
IN
= 3V,
SHDN
pulled
from low to high
11
25
2.1
2
205
0.02
1
ms
µV
P-P
µV
RMS
I
SC
∆V
OUT
/cycle
∆V
OUT
/time
1000h at T
A
= +25°C
Short to GND
Short to IN
MAX6037B_21 (0.3%)
MAX6037C_21 (0.5%)
TCV
OUT
∆V
OUT
/∆V
IN
2.0439
2.0418
2.0378
2.0480
2.0480
2.0480
6
6
0.0008
0.006
0.004
0.02
0.01
16
32
458
133
2.0521
2.0542
2.0582
25
50
0.0107
0.044
0.044
0.195
0.195
mA
ppm
ppm
%/mA
ppm/°C
%/V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Turn-On Settling Time
Output Impedance when
Disabled
Capacitive-Load Stability
Range (Note 4)
INPUT
Supply Voltage Range
Quiescent Supply Current
Shutdown Supply Current
t
R
Z
OUT
C
OUT
V
IN
= 3V, V
SHDN
= 0V
kΩ
µF
V
IN
I
IN
I
SHDN
Guaranteed by line regulation test
V
SHDN
= 0V
2.5
190
0.05
5.5
275
500
V
µA
nA
_______________________________________________________________________________________
3
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
MAX6037
ELECTRICAL CHARACTERISTICS—MAX6037_21 (V
OUT
= 2.048V) (continued)
(V
IN
= V
SHDN
= +3V, I
OUT
= 0, C
OUT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SHUTDOWN (SHDN)
Logic-High Input Voltage
Logic-Low Input Voltage
Logic-High Input Current
Logic-Low Input Current
V
ENH
V
ENL
I
ENH
I
ENL
2.5V
≤
V
IN
≤
5.5V
2.5V
≤
V
IN
≤
5.5V
2.5V
≤
V
IN
≤
5.5V, V
SHDN
= V
IN
2.5V
≤
V
IN
≤
5.5V, V
SHDN
= 0V
-1000
-1000
0.15
0.05
2.0
0.7
+1000
+1000
V
V
nA
nA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ELECTRICAL CHARACTERISTICS—MAX6037_25 (V
OUT
= 2.500V)
(V
IN
= V
SHDN
= +5V, I
OUT
= 0, C
OUT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
MAX6037A_25 (0.2%)
Output Voltage
Output-Voltage Temperature
Coefficient (Note 2)
Line Regulation
V
OUT
T
A
= +25°C
MAX6037A_25
MAX6037B/C_25
(V
OUT
+ 0.2V)
≤
V
IN
≤
5.5V
Sourcing: 0
≤
I
OUT
≤
1mA
Load Regulation
∆V
OUT
/∆I
OUT
Sourcing: 1mA
≤
I
OUT
≤
5mA
Sinking: -1mA
≤
I
OUT
≤
0
Sinking: -5mA
≤
I
OUT
≤
-1mA
OUT Short-Circuit Current
Dropout Voltage (Note 5)
Thermal Hysteresis (Note 3)
Long-Term Stability
DYNAMIC
Noise Voltage
e
OUT
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To V
OUT
= 0.1%
of final value,
C
OUT
= 0.02µF
Initial power-up
V
IN
= 5V,
SHDN
pulled
from low to high
14
30
2.2
2
250
0.02
1
ms
µV
P-P
µV
RMS
I
SC
V
IN
- V
OUT
∆V
OUT
/cycle
∆V
OUT
/time
1000h at T
A
= +25°C
Short to GND
Short to IN
I
SOURCE
= 1mA
I
SOURCE
= 5mA
MAX6037B_25 (0.3%)
MAX6037C_25 (0.5%)
TCV
OUT
∆V
OUT
/∆V
IN
2.4950
2.4925
2.4875
2.500
2.500
2.500
6
6
0.0004
0.005
0.003
0.02
0.01
33
32
40
190
514
133
100
410
2.5050
2.5075
2.5125
25
50
0.012
0.036
0.036
0.2
0.2
mA
mV
ppm
ppm
%/mA
ppm/°C
%/V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Turn-On Settling Time
Output Impedance when
Disabled
Capacitive-Load Stability
Range (Note 4)
t
R
Z
OUT
C
OUT
V
IN
= 5V, V
SHDN
= 0V
kΩ
µF
4
_______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS—MAX6037_25 (V
OUT
= 2.500V) (continued)
(V
IN
= V
SHDN
= +5V, I
OUT
= 0, C
OUT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
INPUT
Supply Voltage Range
Quiescent Supply Current
Shutdown Supply Current
SHUTDOWN (SHDN)
Logic-High Input Voltage
Logic-Low Input Voltage
Logic-High Input Current
Logic-Low Input Current
V
ENH
V
ENL
I
ENH
I
ENL
2.7V
≤
V
IN
≤
5.5V
2.7V
≤
V
IN
≤
5.5V
2.7V
≤
V
IN
≤
5.5V, V
SHDN
= V
IN
2.7V
≤
V
IN
≤
5.5V, V
SHDN
= 0V
-1000
-1000
0.15
0.05
2.0
0.75
+1000
+1000
V
V
nA
nA
V
IN
I
IN
I
SHDN
V
SHDN
= 0V
Guaranteed by line regulation test
2.7
210
0.05
5.5
275
500
V
µA
nA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6037
ELECTRICAL CHARACTERISTICS—MAX6037_30 (V
OUT
= 3.000V)
(V
IN
= V
SHDN
= +5V, I
OUT
= 0, C
OUT
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
MAX6037A_30 (0.2%)
Output Voltage
Output-Voltage Temperature
Coefficient (Note 2)
Line Regulation
V
OUT
T
A
= +25°C
MAX6037A_30
MAX6037B/C_30
(V
OUT
+ 0.2V)
≤
V
IN
≤
5.5V
Sourcing: 0
≤
I
OUT
≤
1mA
Load Regulation
∆V
OUT
/∆I
OUT
Sourcing: 1mA
≤
I
OUT
≤
5mA
Sinking: -1mA
≤
I
OUT
≤
0
Sinking: -5mA
≤
I
OUT
≤
-1mA
OUT Short-Circuit Current
Dropout Voltage (Note 5)
Thermal Hysteresis (Note 3)
Long-Term Stability
DYNAMIC
Noise Voltage
e
OUT
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To V
OUT
= 0.1%
of final value,
C
OUT
= 0.02µF
Initial power-up
V
IN
= 5V,
SHDN
pulled
from low to high
17
40
2.4
2.1
ms
µV
P-P
µV
RMS
I
SC
V
IN
- V
OUT
∆V
OUT
/cycle
∆V
OUT
/time
1000h at T
A
= +25°C
Short to GND
Short to IN
I
SOURCE
= 1mA
I
SOURCE
= 5mA
MAX6037B_30 (0.3%)
MAX6037C_30 (0.5%)
TCV
OUT
∆V
OUT
/∆V
IN
2.9940
2.9910
2.9850
3.000
3.000
3.000
6
6
0.0004
0.005
0.008
0.02
0.01
33
32
40
190
501
133
100
410
3.0060
3.0090
3.0150
25
50
0.0133
0.035
0.03
0.2
0.2
mA
mV
ppm
ppm
%/mA
ppm/°C
%/V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Turn-On Settling Time
t
R
_______________________________________________________________________________________
5
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