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 275A (max) quies-
cent current. The output is stable driving loads from
0.02F to 1F 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 -40C to +125C
automotive temperature range.
Applications
Medical Equipment
Portable Equipment
Wireless LAN
Precision Regulators
Features
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: -40C to +125C
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
________________________________________________________________
Maxim Integrated Products
1
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX6037AAUK12-T
-40
C to +125
C
5 SOT23-5
AEIV
MAX6037BAUK12-T
-40
C to +125
C
5 SOT23-5
AEIW
MAX6037CAUK12-T
-40
C to +125
C
5 SOT23-5
AEIX
Ordering Information
PART
OUTPUT
VOLTAGE (V)
MAX
TEMPCO
(ppm/
C)
INITIAL
ACCURACY
(%, max)
MAX6037AAUK12
1.25
25
0.2
MAX6037BAUK12
1.25
50
0.3
MAX6037CAUK12
1.25
50
0.5
MAX6037AAUK21
2.048
25
0.2
MAX6037BAUK21
2.048
50
0.3
MAX6037CAUK21
2.048
50
0.5
MAX6037AAUK25
2.5
25
0.2
MAX6037BAUK25
2.5
50
0.3
MAX6037CAUK25
2.5
50
0.5
MAX6037AAUK30
3.0
25
0.2
MAX6037BAUK30
3.0
50
0.3
MAX6037CAUK30
3.0
50
0.5
MAX6037AAUK33
3.3
25
0.2
MAX6037BAUK33
3.3
50
0.3
MAX6037CAUK33
3.3
50
0.5
MAX6037AAUK41
4.096
25
0.2
MAX6037BAUK41
4.096
50
0.3
MAX6037CAUK41
4.096
50
0.5
M AX 6037AAU KAD J* 1.184 to 5, adj
25
0.2
M AX 6037BAU KAD J* 1.184 to 5, adj
50
0.3
M AX 6037C AU KAD J* 1.184 to 5, adj
50
0.5
Selector Guide
19-3192; Rev 0; 2/04
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.
Ordering Information continued at end of data sheet.
Typical Operating Circuit
OUT
* OPTIONAL
*
IN
2.5V TO 5.5V INPUT
GND
SHDN
REFERENCE
OUTPUT
0.02F
TO 1F
MAX6037
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.
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--MAX6037_12 (V
OUT
= 1.25V)
(V
IN
= V
SHDN
= +3V, I
OUT
= 0, C
OUT
= 0.1F, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (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.
IN, OUT, SHDN, ADJ to GND...................................-0.3V to +6V
Output Short Circuit to GND or IN............................. Continuous
Continuous Power Dissipation (T
A
= +70C)
5-Pin SOT23 (derate 7.1mW/C above +70C)............571mW
Operating Temperature Range .........................-40C to +125C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
MAX6037A_12 (0.2%)
1.2475
1.250
1.2525
MAX6037B_12 (0.3%)
1.2462
1.250
1.2538
Output Voltage
V
OUT
T
A
= +25
C
MAX6037C_12 (0.5%)
1.2438
1.250
1.2563
V
MAX6037A_12
6
25
Output-Voltage Temperature
Coefficient (Note 2)
TCV
OUT
MAX6037B/C_12
6
50
ppm/
C
Line Regulation
V
OUT
/
V
IN
2.5V
V
IN
5.5V
0.0006
0.0096
%/V
Sourcing: 0
I
OUT
1mA
0.008
0.072
Sourcing: 1mA
I
OUT
5mA
0.006
0.072
Sinking: -1mA
I
OUT
0
0.025
0.12
Load Regulation
V
OUT
/
I
OUT
Sinking: -5mA
I
OUT
-1mA
0.014
0.12
%/mA
Short to GND
16
OUT Short-Circuit Current
I
SC
Short to IN
32
mA
Thermal Hysteresis (Note 3)
V
OUT
/cycle
485
ppm
Long-Term Stability
V
OUT
/time
1000h at T
A
= +25
C
133
ppm
DYNAMIC
f = 0.1Hz to 10Hz
6
V
P-P
Noise Voltage
e
OUT
f = 10Hz to 1kHz
15
V
RMS
Initial power-up
360
Turn-On Settling Time
t
R
To V
OUT
= 0.1%
of final value,
C
OUT
= 0.02F
V
IN
= 3V, SHDN pulled
from low to high
75
s
Output Impedance when
Disabled
Z
OUT
V
IN
= 3V, V
SHDN
= 0V
125
k
Capacitive-Load Stability
Range (Note 4)
C
OUT
0.02
1
F
INPUT
Supply Voltage Range
V
IN
Guaranteed by line regulation test
2.5
5.5
V
Quiescent Supply Current
I
IN
190
275
A
Shutdown Supply Current
I
SHDN
V
SHDN
= 0V
0.05
500
nA
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--MAX6037_12 (V
OUT
= 1.25V) (continued)
(V
IN
= V
SHDN
= +3V, I
OUT
= 0, C
OUT
= 0.1F, 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
SHUTDOWN (
SHDN
)
Logic-High Input Voltage
V
ENH
2.5V
V
IN
5.5V
2.0
V
Logic-Low Input Voltage
V
ENL
2.5V
V
IN
5.5V
0.7
V
Logic-High Input Current
I
ENH
2.5V
V
IN
5.5V, V
SHDN
= V
IN
-1000
0.15
+1000
nA
Logic-Low Input Current
I
ENL
2.5V
V
IN
5.5V, V
SHDN
= 0V
-1000
0.05
+1000
nA
ELECTRICAL CHARACTERISTICS--MAX6037_21 (V
OUT
= 2.048V)
(V
IN
= V
SHDN
= +3V, I
OUT
= 0, C
OUT
= 0.1F, 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
MAX6037A_21 (0.2%)
2.0439
2.0480
2.0521
MAX6037B_21 (0.3%)
2.0418
2.0480
2.0542
Output Voltage
V
OUT
T
A
= +25
C
MAX6037C_21 (0.5%)
2.0378
2.0480
2.0582
V
MAX6037A_21
6
25
Output-Voltage Temperature
Coefficient (Note 2)
TCV
OUT
MAX6037B/C_21
6
50
ppm/
C
Line Regulation
V
OUT
/
V
IN
2.5V
V
IN
5.5V
0.0008
0.0107
%/V
Sourcing: 0
I
OUT
1mA
0.006
0.044
Sourcing: 1mA
I
OUT
5mA
0.004
0.044
Sinking: -1mA
I
OUT
0
0.02
0.195
Load Regulation
V
OUT
/
I
OUT
Sinking: -5mA
I
OUT
-1mA
0.01
0.195
%/mA
Short to GND
16
OUT Short-Circuit Current
I
SC
Short to IN
32
mA
Thermal Hysteresis (Note 3)
V
OUT
/cycle
458
ppm
Long-Term Stability
V
OUT
/time
1000h at T
A
= +25
C
133
ppm
DYNAMIC
f = 0.1Hz to 10Hz
11
V
P-P
Noise Voltage
e
OUT
f = 10Hz to 1kHz
25
V
RMS
Initial power-up
2.1
Turn-On Settling Time
t
R
To V
OUT
= 0.1%
of final value,
C
OUT
= 0.02F
V
IN
= 3V, SHDN pulled
from low to high
2
ms
Output Impedance when
Disabled
Z
OUT
V
IN
= 3V, V
SHDN
= 0V
205
k
Capacitive-Load Stability
Range (Note 4)
C
OUT
0.02
1
F
INPUT
Supply Voltage Range
V
IN
Guaranteed by line regulation test
2.5
5.5
V
Quiescent Supply Current
I
IN
190
275
A
Shutdown Supply Current
I
SHDN
V
SHDN
= 0V
0.05
500
nA
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS--MAX6037_21 (V
OUT
= 2.048V) (continued)
(V
IN
= V
SHDN
= +3V, I
OUT
= 0, C
OUT
= 0.1F, 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
SHUTDOWN (
SHDN
)
Logic-High Input Voltage
V
ENH
2.5V
V
IN
5.5V
2.0
V
Logic-Low Input Voltage
V
ENL
2.5V
V
IN
5.5V
0.7
V
Logic-High Input Current
I
ENH
2.5V
V
IN
5.5V, V
SHDN
= V
IN
-1000
0.15
+1000
nA
Logic-Low Input Current
I
ENL
2.5V
V
IN
5.5V, V
SHDN
= 0V
-1000
0.05
+1000
nA
ELECTRICAL CHARACTERISTICS--MAX6037_25 (V
OUT
= 2.500V)
(V
IN
= V
SHDN
= +5V, I
OUT
= 0, C
OUT
= 0.1F, 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
MAX6037A_25 (0.2%)
2.4950
2.500
2.5050
MAX6037B_25 (0.3%)
2.4925
2.500
2.5075
Output Voltage
V
OUT
T
A
= +25
C
MAX6037C_25 (0.5%)
2.4875
2.500
2.5125
V
MAX6037A_25
6
25
Output-Voltage Temperature
Coefficient (Note 2)
TCV
OUT
MAX6037B/C_25
6
50
ppm/
C
Line Regulation
V
OUT
/
V
IN
(V
OUT
+ 0.2V)
V
IN
5.5V
0.0004
0.012
%/V
Sourcing: 0
I
OUT
1mA
0.005
0.036
Sourcing: 1mA
I
OUT
5mA
0.003
0.036
Sinking: -1mA
I
OUT
0
0.02
0.2
Load Regulation
V
OUT
/
I
OUT
Sinking: -5mA
I
OUT
-1mA
0.01
0.2
%/mA
Short to GND
33
OUT Short-Circuit Current
I
SC
Short to IN
32
mA
I
SOURCE
= 1mA
40
100
Dropout Voltage (Note 5)
V
IN
- V
OUT
I
SOURCE
= 5mA
190
410
mV
Thermal Hysteresis (Note 3)
V
OUT
/cycle
514
ppm
Long-Term Stability
V
OUT
/time
1000h at T
A
= +25
C
133
ppm
DYNAMIC
f = 0.1Hz to 10Hz
14
V
P-P
Noise Voltage
e
OUT
f = 10Hz to 1kHz
30
V
RMS
Initial power-up
2.2
Turn-On Settling Time
t
R
To V
OUT
= 0.1%
of final value,
C
OUT
= 0.02F
V
IN
= 5V, SHDN pulled
from low to high
2
ms
Output Impedance when
Disabled
Z
OUT
V
IN
= 5V, V
SHDN
= 0V
250
k
Capacitive-Load Stability
Range (Note 4)
C
OUT
0.02
1
F
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS--MAX6037_30 (V
OUT
= 3.000V)
(V
IN
= V
SHDN
= +5V, I
OUT
= 0, C
OUT
= 0.1F, 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
MAX6037A_30 (0.2%)
2.9940
3.000
3.0060
MAX6037B_30 (0.3%)
2.9910
3.000
3.0090
Output Voltage
V
OUT
T
A
= +25
C
MAX6037C_30 (0.5%)
2.9850
3.000
3.0150
V
MAX6037A_30
6
25
Output-Voltage Temperature
Coefficient (Note 2)
TCV
OUT
MAX6037B/C_30
6
50
ppm/
C
Line Regulation
V
OUT
/
V
IN
(V
OUT
+ 0.2V)
V
IN
5.5V
0.0004
0.0133
%/V
Sourcing: 0
I
OUT
1mA
0.005
0.035
Sourcing: 1mA
I
OUT
5mA
0.008
0.03
Sinking: -1mA
I
OUT
0
0.02
0.2
Load Regulation
V
OUT
/
I
OUT
Sinking: -5mA
I
OUT
-1mA
0.01
0.2
%/mA
Short to GND
33
OUT Short-Circuit Current
I
SC
Short to IN
32
mA
I
SOURCE
= 1mA
40
100
Dropout Voltage (Note 5)
V
IN
- V
OUT
I
SOURCE
= 5mA
190
410
mV
Thermal Hysteresis (Note 3)
V
OUT
/cycle
501
ppm
Long-Term Stability
V
OUT
/time
1000h at T
A
= +25
C
133
ppm
DYNAMIC
f = 0.1Hz to 10Hz
17
V
P-P
Noise Voltage
e
OUT
f = 10Hz to 1kHz
40
V
RMS
Initial power-up
2.4
Turn-On Settling Time
t
R
To V
OUT
= 0.1%
of final value,
C
OUT
= 0.02F
V
IN
= 5V, SHDN pulled
from low to high
2.1
ms
ELECTRICAL CHARACTERISTICS--MAX6037_25 (V
OUT
= 2.500V) (continued)
(V
IN
= V
SHDN
= +5V, I
OUT
= 0, C
OUT
= 0.1F, 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
INPUT
Supply Voltage Range
V
IN
Guaranteed by line regulation test
2.7
5.5
V
Quiescent Supply Current
I
IN
210
275
A
Shutdown Supply Current
I
SHDN
V
SHDN
= 0V
0.05
500
nA
SHUTDOWN (
SHDN
)
Logic-High Input Voltage
V
ENH
2.7V
V
IN
5.5V
2.0
V
Logic-Low Input Voltage
V
ENL
2.7V
V
IN
5.5V
0.75
V
Logic-High Input Current
I
ENH
2.7V
V
IN
5.5V, V
SHDN
= V
IN
-1000
0.15
+1000
nA
Logic-Low Input Current
I
ENL
2.7V
V
IN
5.5V, V
SHDN
= 0V
-1000
0.05
+1000
nA
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