19-3192; Rev 1; 12/07
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
Features
♦ Adjustable VOUT: 1.184V to 5V
♦ Fixed Outputs: 1.25V, 2.048V, 2.5V, 3.0V, 3.3V,
and 4.096V
The MAX6037 family of low-dropout, micropower voltage references offer fixed and adjustable output voltage 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 voltages 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) quiescent 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 coefficient 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.
♦ 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
Typical Operating Circuit
The MAX6037 is available in the miniature 5-pin SOT23
package and is specified over the -40°C to +125°C
automotive temperature range.
2.5V TO 5.5V INPUT
IN
Applications
Medical Equipment
Wireless LAN
*
Portable Equipment
Precision Regulators
*OPTIONAL
REFERENCE
OUTPUT
OUT
MAX6037
SHDN
0.02µF
TO 1µF
GND
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
OUTPUT
VOLTAGE (V)
INITIAL
ACCURACY %
MAX TEMPCO
(ppm/°C)
PIN-PACKAGE
PKG
CODE
TOP
MARK
1.25
0.2
25
5 SOT23-5
U5-2
AEIV
MAX6037BAUK12+T
1.25
0.3
50
5 SOT23-5
U5-2
AEIW
MAX6037CAUK12+T
1.25
0.5
50
5 SOT23-5
U5-2
AEIX
MAX6037AAUK21+T
2.048
0.2
25
5 SOT23-5
U5-2
AEIY
MAX6037BAUK21+T
2.048
0.3
50
5 SOT23-5
U5-2
AEIZ
MAX6037CAUK21+T
2.048
0.5
50
5 SOT23-5
U5-2
AEJA
PART
MAX6037AAUK12+T
+Denotes a lead-free package.
T = Tape and reel.
Note: All devices are specified over the -40°C to +125°C operating temperature range.
Ordering Information/Selector Guide continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX6037
General Description
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
ABSOLUTE MAXIMUM RATINGS
IN, OUT, SHDN, ADJ to GND...................................-0.3V to +6V
Output Short Circuit to GND or IN............................. Continuous
Continuous Power Dissipation (TA = +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 (VOUT = 1.25V)
(VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6037A_12 (0.2%)
1.2475
1.250
1.2525
MAX6037B_12 (0.3%)
1.2462
1.250
1.2538
MAX6037C_12 (0.5%)
1.2438
1.250
1.2563
MAX6037A_12
6
25
MAX6037B/C_12
6
50
2.5V ≤ VIN ≤ 5.5V
UNITS
OUTPUT
Output Voltage
Output-Voltage Temperature
Coefficient (Note 2, 4)
Line Regulation
Load Regulation
OUT Short-Circuit Current
VOUT
TCVOUT
∆VOUT/∆VIN
∆VOUT/∆IOUT
ISC
Thermal Hysteresis (Note 3)
∆VOUT/cycle
Long-Term Stability
∆VOUT/time
TA = +25°C
0.0006
0.0096
Sourcing: 0 ≤ IOUT ≤ 1mA
0.008
0.072
Sourcing: 1mA ≤ IOUT ≤ 5mA
0.006
0.072
Sinking: -1mA ≤ IOUT ≤ 0
0.025
0.12
Sinking: -5mA ≤ IOUT ≤ -1mA
0.014
0.12
Short to GND
16
Short to IN
32
1000h at TA = +25°C
V
ppm/°C
%/V
%/mA
mA
485
ppm
133
ppm
6
µVP-P
15
µVRMS
DYNAMIC
Noise Voltage
Turn-On Settling Time
eOUT
tR
Output Impedance when
Disabled
ZOUT
Capacitive-Load Stability
Range (Note 4)
COUT
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To VOUT = 0.1%
of final value,
COUT = 0.02µF
Initial power-up
360
VIN = 3V, SHDN pulled
from low to high
75
VIN = 3V, VSHDN = 0V
µs
125
0.02
kΩ
1
µF
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Shutdown Supply Current
ISHDN
2
Guaranteed by line regulation test
VSHDN = 0V
2.5
5.5
V
190
275
µA
0.05
500
nA
_______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
(VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SHUTDOWN (SHDN)
Logic-High Input Voltage
VENH
2.5V ≤ VIN ≤ 5.5V
Logic-Low Input Voltage
VENL
2.5V ≤ VIN ≤ 5.5V
Logic-High Input Current
IENH
2.5V ≤ VIN ≤ 5.5V, VSHDN = VIN
-1000
Logic-Low Input Current
IENL
2.5V ≤ VIN ≤ 5.5V, VSHDN = 0V
-1000
2.0
V
0.7
V
0.15
+1000
nA
0.05
+1000
nA
ELECTRICAL CHARACTERISTICS—MAX6037_21 (VOUT = 2.048V)
(VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6037A_21 (0.2%)
2.0439
2.0480
2.0521
MAX6037B_21 (0.3%)
2.0418
2.0480
2.0542
MAX6037C_21 (0.5%)
2.0378
2.0480
2.0582
MAX6037A_21
6
25
MAX6037B/C_21
6
50
2.5V ≤ VIN ≤ 5.5V
0.0008
0.0107
Sourcing: 0 ≤ IOUT ≤ 1mA
0.006
0.044
Sourcing: 1mA ≤ IOUT ≤ 5mA
0.004
0.044
Sinking: -1mA ≤ IOUT ≤ 0
0.02
0.195
Sinking: -5mA ≤ IOUT ≤ -1mA
0.01
0.195
UNITS
OUTPUT
Output Voltage
VOUT
Output-Voltage Temperature
Coefficient (Note 2, 4)
TCVOUT
∆VOUT/∆VIN
Line Regulation
∆VOUT/∆IOUT
Load Regulation
OUT Short-Circuit Current
ISC
Thermal Hysteresis (Note 3)
∆VOUT/cycle
Long-Term Stability
∆VOUT/time
TA = +25°C
Short to GND
16
Short to IN
32
V
ppm/°C
%/V
%/mA
mA
458
ppm
1000h at TA = +25°C
133
ppm
f = 0.1Hz to 10Hz
11
µVP-P
f = 10Hz to 1kHz
25
µVRMS
DYNAMIC
Noise Voltage
eOUT
Turn-On Settling Time
tR
Output Impedance when
Disabled
ZOUT
Capacitive-Load Stability
Range (Note 4)
COUT
To VOUT = 0.1%
of final value,
COUT = 0.02µF
Initial power-up
2.1
VIN = 3V, SHDN pulled
from low to high
ms
2
VIN = 3V, VSHDN = 0V
205
kΩ
0.02
1
µF
2.5
5.5
V
190
275
µA
0.05
500
nA
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Shutdown Supply Current
ISHDN
Guaranteed by line regulation test
VSHDN = 0V
_______________________________________________________________________________________
3
MAX6037
ELECTRICAL CHARACTERISTICS—MAX6037_12 (VOUT = 1.25V) (continued)
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS—MAX6037_21 (VOUT = 2.048V) (continued)
(VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SHUTDOWN (SHDN)
Logic-High Input Voltage
VENH
2.5V ≤ VIN ≤ 5.5V
Logic-Low Input Voltage
VENL
2.5V ≤ VIN ≤ 5.5V
0.7
V
Logic-High Input Current
IENH
2.5V ≤ VIN ≤ 5.5V, VSHDN = VIN
-1000
0.15
+1000
nA
Logic-Low Input Current
IENL
2.5V ≤ VIN ≤ 5.5V, VSHDN = 0V
-1000
0.05
+1000
nA
2.0
V
ELECTRICAL CHARACTERISTICS—MAX6037_25 (VOUT = 2.500V)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6037A_25 (0.2%)
2.4950
2.500
2.5050
MAX6037B_25 (0.3%)
2.4925
2.500
2.5075
MAX6037C_25 (0.5%)
2.4875
2.500
2.5125
MAX6037A_25
6
25
MAX6037B/C_25
6
50
(VOUT + 0.2V) ≤ VIN ≤ 5.5V
0.0004
0.012
Sourcing: 0 ≤ IOUT ≤ 1mA
0.005
0.036
Sourcing: 1mA ≤ IOUT ≤ 5mA
0.003
0.036
Sinking: -1mA ≤ IOUT ≤ 0
0.02
0.2
Sinking: -5mA ≤ IOUT ≤ -1mA
0.01
0.2
UNITS
OUTPUT
Output Voltage
Output-Voltage Temperature
Coefficient (Note 2, 4)
Line Regulation
Load Regulation
VOUT
TCVOUT
∆VOUT/∆VIN
∆VOUT/∆IOUT
OUT Short-Circuit Current
ISC
Dropout Voltage (Note 5)
VIN - VOUT
Thermal Hysteresis (Note 3)
∆VOUT/cycle
Long-Term Stability
∆VOUT/time
TA = +25°C
Short to GND
33
Short to IN
32
V
ppm/°C
%/V
%/mA
mA
ISOURCE = 1mA
40
100
ISOURCE = 5mA
190
410
mV
514
ppm
1000h at TA = +25°C
133
ppm
f = 0.1Hz to 10Hz
14
µVP-P
30
µVRMS
DYNAMIC
Noise Voltage
Turn-On Settling Time
eOUT
tR
Output Impedance when
Disabled
ZOUT
Capacitive-Load Stability
Range (Note 4)
COUT
4
f = 10Hz to 1kHz
To VOUT = 0.1%
of final value,
COUT = 0.02µF
Initial power-up
2.2
VIN = 5V, SHDN pulled
from low to high
ms
2
VIN = 5V, VSHDN = 0V
250
0.02
_______________________________________________________________________________________
kΩ
1
µF
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
210
275
µA
0.05
500
nA
INPUT
Supply Voltage Range
VIN
Guaranteed by line regulation test
2.7
Quiescent Supply Current
IIN
Shutdown Supply Current
ISHDN
VSHDN = 0V
Logic-High Input Voltage
VENH
2.7V ≤ VIN ≤ 5.5V
Logic-Low Input Voltage
VENL
2.7V ≤ VIN ≤ 5.5V
Logic-High Input Current
IENH
2.7V ≤ VIN ≤ 5.5V, VSHDN = VIN
-1000
Logic-Low Input Current
IENL
2.7V ≤ VIN ≤ 5.5V, VSHDN = 0V
-1000
SHUTDOWN (SHDN)
2.0
V
0.75
V
0.15
+1000
nA
0.05
+1000
nA
ELECTRICAL CHARACTERISTICS—MAX6037_30 (VOUT = 3.000V)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6037A_30 (0.2%)
2.9940
3.000
3.0060
MAX6037B_30 (0.3%)
2.9910
3.000
3.0090
MAX6037C_30 (0.5%)
2.9850
UNITS
OUTPUT
Output Voltage
VOUT
Output-Voltage Temperature
Coefficient (Note 2, 4)
TCVOUT
∆VOUT/∆VIN
Line Regulation
∆VOUT/∆IOUT
Load Regulation
OUT Short-Circuit Current
ISC
Dropout Voltage (Note 5)
VIN - VOUT
Thermal Hysteresis (Note 3)
∆VOUT/cycle
Long-Term Stability
∆VOUT/time
TA = +25°C
3.000
3.0150
MAX6037A_30
6
25
MAX6037B/C_30
6
50
(VOUT + 0.2V) ≤ VIN ≤ 5.5V
0.0004
0.0133
Sourcing: 0 ≤ IOUT ≤ 1mA
0.005
0.035
Sourcing: 1mA ≤ IOUT ≤ 5mA
0.008
0.03
Sinking: -1mA ≤ IOUT ≤ 0
0.02
0.2
Sinking: -5mA ≤ IOUT ≤ -1mA
0.01
0.2
Short to GND
33
Short to IN
32
ISOURCE = 1mA
40
100
ISOURCE = 5mA
190
410
V
ppm/°C
%/V
%/mA
mA
mV
501
ppm
1000h at TA = +25°C
133
ppm
f = 0.1Hz to 10Hz
17
µVP-P
f = 10Hz to 1kHz
40
µVRMS
DYNAMIC
Noise Voltage
eOUT
Turn-On Settling Time
tR
To VOUT = 0.1%
of final value,
COUT = 0.02µF
Initial power-up
2.4
VIN = 5V, SHDN pulled
from low to high
2.1
ms
_______________________________________________________________________________________
5
MAX6037
ELECTRICAL CHARACTERISTICS—MAX6037_25 (VOUT = 2.500V) (continued)
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS—MAX6037_30 (VOUT = 3.000V) (continued)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Output Impedance when
Disabled
ZOUT
Capacitive-Load Stability
Range (Note 4)
COUT
CONDITIONS
MIN
VIN = 5V, VSHDN = 0V
TYP
MAX
300
0.02
UNITS
kΩ
1
µF
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Guaranteed by line regulation test
3.2
5.5
V
210
275
µA
Shutdown Supply Current
ISHDN
VSHDN = 0V
0.05
500
nA
Logic-High Input Voltage
VENH
3.2V ≤ VIN ≤ 5.5V
Logic-Low Input Voltage
VENL
3.2V ≤ VIN ≤ 5.5V
0.8
V
Logic-High Input Current
IENH
3.2V ≤ VIN ≤ 5.5V, VSHDN = VIN
-1000
0.15
+1000
nA
Logic-Low Input Current
IENL
3.2V ≤ VIN ≤ 5.5V, VSHDN = 0V
-1000
0.05
+1000
nA
SHUTDOWN (SHDN)
2.0
V
ELECTRICAL CHARACTERISTICS—MAX6037_33 (VOUT = 3.300V)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6037A_33 (0.2%)
MAX6037B_33 (0.3%)
3.2934
3.2901
3.300
3.300
3.3066
3.3099
V
MAX6037C_33 (0.5%)
3.2855
3.300
3.3165
MAX6037A_33
6
25
MAX6037B/C_33
6
50
(VOUT + 0.2V) ≤ VIN ≤ 5.5V
0.0003
0.0133
Sourcing: 0 ≤ IOUT ≤ 1mA
0.005
0.027
Sourcing: 1mA ≤ IOUT ≤ 5mA
0.002
0.027
Sinking: -1mA ≤ IOUT ≤ 0
0.02
0.212
Sinking: -5mA ≤ IOUT ≤ -1mA
0.01
0.212
OUTPUT
Output Voltage
Output-Voltage Temperature
Coefficient (Note 2, 4)
Line Regulation
Load Regulation
VOUT
TCVOUT
∆VOUT/∆VIN
∆VOUT/∆IOUT
OUT Short-Circuit Current
ISC
Dropout Voltage (Note 5)
VIN - VOUT
Thermal Hysteresis (Note 3)
∆VOUT/cycle
Long-Term Stability
∆VOUT/time
6
TA = +25°C
Short to GND
33
Short to IN
32
%/V
%/mA
mA
ISOURCE = 1mA
40
100
ISOURCE = 5mA
190
410
1000h at TA = +25°C
ppm/°C
mV
514
ppm
133
ppm
_______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DYNAMIC
Noise Voltage
eOUT
Turn-On Settling Time
tR
Output Impedance when
Disabled
ZOUT
Capacitive-Load Stability
Range (Note 4)
COUT
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To VOUT = 0.1%
of final value,
COUT = 0.02µF
19
µVP-P
45
µVRMS
Initial power-up
2.6
VIN = 5V, SHDN pulled
from low to high
2.4
VIN = 5V, VSHDN = 0V
ms
330
0.02
kΩ
1
µF
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Guaranteed by line regulation test
3.5
Shutdown Supply Current
ISHDN
VSHDN = 0V
Logic-High Input Voltage
VENH
3.5V ≤ VIN ≤ 5.5V
Logic-Low Input Voltage
VENL
3.5V ≤ VIN ≤ 5.5V
Logic-High Input Current
IENH
3.5V ≤ VIN ≤ 5.5V, VSHDN = VIN
-1000
Logic-Low Input Current
IENL
3.5V ≤ VIN ≤ 5.5V, VSHDN = 0V
-1000
5.5
V
210
275
µA
0.05
500
nA
SHUTDOWN (SHDN)
2.0
V
0.8
V
0.15
+1000
nA
0.05
+1000
nA
ELECTRICAL CHARACTERISTICS—MAX6037_41 (VOUT = 4.096V)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6037A_41 (0.2%)
4.0878
4.096
4.1042
MAX6037B_41 (0.3%)
4.0837
4.096
4.1083
MAX6037C_41 (0.5%)
4.0755
4.096
4.1165
MAX6037A_41
6
25
MAX6037B/C_41
6
50
(VOUT + 0.2V) ≤ VIN ≤ 5.5V
0.0003
0.0105
Sourcing: 0 ≤ IOUT ≤ 1mA
0.004
0.35
Sourcing: 1mA ≤ IOUT ≤ 5mA
0.002
0.027
Sinking: -1mA ≤ IOUT ≤ 0
0.02
0.212
Sinking: -5mA ≤ IOUT ≤ -1mA
0.01
0.212
UNITS
OUTPUT
Output Voltage
VOUT
Output-Voltage Temperature
Coefficient (Note 2, 4)
Line Regulation
Load Regulation
TCVOUT
∆VOUT/∆VIN
∆VOUT/∆IOUT
TA = +25°C
V
ppm/°C
%/V
%/mA
_______________________________________________________________________________________
7
MAX6037
ELECTRICAL CHARACTERISTICS—MAX6037_33 (VOUT = 3.300V) (continued)
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS—MAX6037_41 (VOUT = 4.096V) (continued)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
OUT Short-Circuit Current
ISC
Dropout Voltage (Note 5)
VIN - VOUT
Thermal Hysteresis (Note 3)
∆VOUT/cycle
Long-Term Stability
∆VOUT/time
CONDITIONS
MIN
TYP
MAX
Short to GND
33
Short to IN
32
ISOURCE = 1mA
40
100
ISOURCE = 5mA
190
410
UNITS
mA
mV
524
ppm
1000h at TA = +25°C
133
ppm
f = 0.1Hz to 10Hz
24
µVP-P
50
µVRMS
DYNAMIC
Noise Voltage
Turn-On Settling Time
eOUT
tR
Output Impedance when
Disabled
ZOUT
Capacitive-Load Stability
Range (Note 4)
COUT
f = 10Hz to 1kHz
To VOUT = 0.1%
of final value,
COUT = 0.02µF
Initial power-up
3.2
VIN = 5V, SHDN pulled
from low to high
3.2
VIN = 5V, VSHDN = 0
ms
410
0.02
kΩ
1
µF
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Guaranteed by line regulation test
4.3
Shutdown Supply Current
ISHDN
VSHDN = 0V
Logic-High Input Voltage
VENH
4.3V ≤ VIN ≤ 5.5V
Logic-Low Input Voltage
VENL
4.3V ≤ VIN ≤ 5.5V
Logic-High Input Current
IENH
4.3V ≤ VIN ≤ 5.5V, VSHDN = VIN
-1000
Logic-Low Input Current
IENL
4.3V ≤ VIN ≤ 5.5V, VSHDN = 0V
-1000
5.5
V
210
275
µA
0.05
500
nA
SHUTDOWN (SHDN)
8
2.0
V
0.8
V
0.15
+1000
nA
0.05
+1000
nA
_______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
(VIN = VSHDN = +5V, IOUT = 0, TA = TMIN to TMAX, ADJ shorted to OUT unless otherwise noted. Typical values are at TA = +25°C.)
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6037A_ADJ (0.2%)
1.1816
1.1840
1.1864
MAX6037B_ADJ (0.3%)
1.1805
1.1840
1.1875
MAX6037C_ADJ (0.5%)
1.1781
1.1840
UNITS
OUTPUT
Initial Output Voltage (Note 6)
VOUT
Output Voltage Range
VOUT
Output-Voltage Temperature
Coefficient (Notes 2, 4, 7)
Line Regulation (Note 8)
TCVOUT
∆VOUT/∆VIN
∆VOUT/∆IOUT
Load Regulation
OUT Short-Circuit Current
ISC
Dropout Voltage (Notes 5, 9)
VIN - VOUT
Thermal Hysteresis (Note 3)
∆VOUT/cycle
Long-Term Stability
∆VOUT/time
TA = +25°C
1.184
1.1899
VIN - 0.15
MAX6037A_ADJ
6
25
MAX6037B/C_ADJ
6
50
2.5V ≤ VIN ≤ 5.5V
0.0008
0.013
Sourcing: 0 ≤ IOUT ≤ 1mA
0.012
0.078
Sourcing: 1mA ≤ IOUT ≤ 5mA
0.014
0.1
Sinking: -1mA ≤ IOUT ≤ 0
0.005
0.12
Sinking: -5mA ≤ IOUT ≤ -1mA
0.005
0.12
Short to GND
33
Short to IN
32
ISOURCE = 1mA, VOUT = 5V
40
100
ISOURCE = 5mA, VOUT = 5V
190
410
1000h at TA = +25°C
V
V
ppm/°C
%/V
%/mA
mA
mV
421
ppm
133
ppm
6
µVP-P
15
µVRMS
DYNAMIC
Noise Voltage (Note 10)
Turn-On Settling Time
eOUT
tR
Output Impedance when
Disabled (Note 11)
ZOUT
Capacitive-Load Stability
Range (Note 4)
COUT
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To VOUT = 0.1%
of final value,
COUT = 0.02µF
Initial power-up
360
VIN = 5V, SHDN pulled
from low to high
75
VIN = 5V, VSHDN = 0V
µs
>10
0.02
MΩ
1
µF
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Shutdown Supply Current
ISHDN
ADJ Input Bias Current
(Note 4)
IADJ
Guaranteed by line regulation test
2.5
VSHDN = 0V
-50
5.5
V
200
250
µA
0.15
500
nA
0.5
+50
nA
_______________________________________________________________________________________
9
MAX6037
ELECTRICAL CHARACTERISTICS—MAX6037_ADJ (VOUT = 1.184V to 5V)
ELECTRICAL CHARACTERISTICS—MAX6037_ADJ (VOUT = 1.184V to 5V) (continued)
(VIN = VSHDN = +5V, IOUT = 0, TA = TMIN to TMAX, ADJ shorted to OUT unless otherwise noted. Typical values are at TA = +25°C.)
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0.7
V
SHUTDOWN (SHDN)
Logic-High Input Voltage
VENH
2.5V ≤ VIN ≤ 5.5V
Logic-Low Input Voltage
VENL
2.5V ≤ VIN ≤ 5.5V
Logic-High Input Current
IENH
2.5V ≤ VIN ≤ 5.5V, VSHDN = VIN
-1000
0.15
+1000
nA
Logic-Low Input Current
IENL
2.5V ≤ VIN ≤ 5.5V, VSHDN = 0V
-1000
0.05
+1000
nA
2.0
V
Note 1: All devices are 100% tested at TA = +25°C and are guaranteed by design for TA = TMIN to TMAX, as specified.
Note 2: Temperature coefficient is measured by the “box” method, i.e., the maximum ∆VOUT / VOUT is divided by the maximum ∆T.
Note 3: Thermal hysteresis is defined as the change in +25°C output voltage before and after cycling the device from TMAX to
TMIN.
Note 4: Not production tested. Guaranteed by design.
Note 5: Dropout voltage is defined as the minimum differential voltage (VIN - VOUT) at which VOUT decreases by 1% from its original value at VIN = +5.0V.
Note 6: VOUT initial accuracy for the MAX6037_ADJ is tested with ADJ shorted to OUT. Actual accuracy will be affected by matching and the temperature coefficient of the external resistors used. Use 1% resistors with low temperature coefficient for
best overall accuracy.
Note 7: The temperature coefficient for the MAX6037_ADJ is specified for the case where ADJ is connected to OUT. For the case
where an external resistive network is used to set the output voltage, actual change in reference output over temperature
will be affected by the temperature coefficient and matching of the external resistors used.
Note 8: The minimum VIN is the greater of +2.5V and (VOUT + 0.2V).
Note 9: VOUT set to +5V with an external resistive-divider.
Note 10: Noise for the MAX6037_ADJ is specified for a +1.25V output. Noise is proportional to VOUT and is greater for higher output
voltages. In addition, external resistors used to set the output voltage can contribute to noise.
Typical Operating Characteristics
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41;
IOUT = 0, COUT = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.)
2.5025
2.5000
2.4975
TA = +125°C
210
200
TA = +25°C
190
VIN = +5.5V
225
200
VIN = +2.5V
175
2.4950
TA = -40°C
180
2.4925
150
170
2.4900
-50
-25
0
25
50
75
TEMPERATURE (°C)
10
MAX6037 toc03
220
SUPPLY CURRENT (µA)
2.5050
SUPPLY CURRENT (µA)
2.5075
250
MAX6037 toc02
230
MAX6037 toc01
2.5100
MAX6037_12 SUPPLY CURRENT
vs. TEMPERATURE (VOUT = 1.25V)
MAX6037_12 SUPPLY CURRENT
vs. INPUT VOLTAGE (VOUT = 1.25V)
MAX6037_25 OUTPUT VOLTAGE
vs. TEMPERATURE (VOUT = 2.500V)
OUTPUT VOLTAGE (V)
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
100
125
2.5
3.0
3.5
4.0
4.5
INPUT VOLTAGE (V)
5.0
5.5
-50
-25
0
25
50
75
TEMPERATURE (°C)
______________________________________________________________________________________
100
125
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
400
TA = +125°C
300
200
TA = -40°C
TA = +25°C
100
0
2
TA = +25°C
1
TA = -40°C
TA = -40°C
0
SINKING CURRENT
-1
SOURCING CURRENT
2
4
6
10
8
-5
SOURCE CURRENT (mA)
3.5
4.0
4.5
5.0
-5
0
5
10
3.0
MAX6037 tpc08
-60
-120
0.001
5.5
SOURCING CURRENT
TA = +125°C
MAX6037_41 SHUTDOWN CURRENT
vs. TEMPERATURE (VOUT = 4.096V)
-100
3.0
-1
MAX6037_25
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 2.500V)
TA = -40°C
2.5
0
OUTPUT CURRENT (mA)
-80
-80
TA = -40°C
SINKING CURRENT
-10
2.5
SHUTDOWN CURRENT (nA)
-60
TA = -40°C
1
OUTPUT CURRENT (mA)
-20
PSRR (dB)
TA = +25°C
TA = +25°C
2
-3
-40
-40
3
10
5
TA = +125°C
-20
4
-2
0
MAX6037 toc07
0
0
TA = +125°C
5
TA = +125°C
-10
MAX6037_12 LINE REGULATION
vs. TEMPERATURE (VOUT = 1.25V)
6
MAX6037 toc06
3
-2
0
OUTPUT VOLTAGE CHANGE (µV)
MAX6037 toc05
TA = +125°C
MAX6037 toc09
DROPOUT VOLTAGE (mV)
500
MAX6037_41
LOAD REGULATION (VOUT = 4.096V)
4
OUTPUT VOLTAGE CHANGE (mV)
MAC6037 toc04
600
MAX6037_12
LOAD REGULATION (VOUT = 1.25V)
OUTPUT VOLTAGE CHANGE (mV)
MAX6037_25 DROPOUT VOLTAGE
vs. SOURCE CURRENT (VOUT = 2.500V)
2.0
1.5
1.0
0.5
0
-0.5
0.01
0.1
1
10
100
1000
-50
-25
0
25
50
75
100
INPUT VOLTAGE (V)
FREQUENCY (kHz)
TEMPERATURE (C)
MAX6037_12 LINE TRANSIENT
(VOUT = 1.25V)
MAX6037_41 LINE TRANSIENT
(VOUT = 4.096V)
MAX6037_12 LOAD TRANSIENT
(VOUT = 1.25V)
MAX6037 toc11
MAX6037 toc10
400µs/div
125
MAX6037 toc12
+10µA
+3.3V
VIN
COUT = 0.1µF
CIN = 0
MAX6037
Typical Operating Characteristics (continued)
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41;
IOUT = 0, COUT = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.)
5.5V
VIN
IOUT
+3V
5V
-10µA
VOUT
AC-COUPLED
10mV/div
VOUT
AC-COUPLED
10mV/div
VOUT
AC-COUPLED
2mV/div
COUT = 0.1µF
CIN = 0
400µs/div
COUT = 1µF
1ms/div
______________________________________________________________________________________
11
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
Typical Operating Characteristics (continued)
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41;
IOUT = 0, COUT = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.)
MAX6037_12 LOAD TRANSIENT
(VOUT = 1.25V)
MAX6037_12 LOAD TRANSIENT
(VOUT = 1.25V)
MAX6037_12 LOAD TRANSIENT
(VOUT = 1.25V)
MAX6037 toc15
MAX6037 toc14
MAX6037 toc13
+5mA
+5mA
IOUT
IOUT
-10µA
-5mA
-5mA
VOUT
AC-COUPLED
2mV/div
VOUT
AC-COUPLED
200mV/div
+10µA
IOUT
COUT = 0.02µF
COUT = 1µF
VOUT
AC-COUPLED
200mV/div
COUT = 0.02µF
400µs/div
1ms/div
1ms/div
MAX6037_41 LOAD TRANSIENT
(VOUT = 4.096V)
MAX6037_41 LOAD TRANSIENT
(VOUT = 4.096V)
MAX6037_41 LOAD TRANSIENT
(VOUT = 4.096V)
MAX6037 toc18
MAX6037 toc17
MAX6037 toc16
+10µA
+10µA
+5mA
IOUT
IOUT
IOUT
-10µA
-10µA
-5mA
VOUT
AC-COUPLED
2mV/div
VOUT
AC-COUPLED
5mV/div
VOUT
AC-COUPLED
200mV/div
COUT = 1µF
COUT = 0.02µF
COUT = 1µF
1ms/div
1ms/div
1ms/div
MAX6037_41 LOAD TRANSIENT
(VOUT = 4.096V)
MAX6037_12 TURN-ON TRANSIENT
(VOUT = 1.25V)
MAX6037_41 TURN-ON TRANSIENT
(VOUT = 4.096V)
MAX6037 toc19
MAX6037 toc21
MAX6037 toc20
+5mA
IOUT
+3V
VIN
-5mA
GND
+5V
VIN
GND
+1.25V
VOUT
2V/div
GND
GND
COUT = 0.02µF
COUT = 0.02µF
COUT = 0.02µF
1ms/div
12
4.096V
VOUT
500mV/div
VOUT
AC-COUPLED
200mV/div
40µs/div
400µs/div
______________________________________________________________________________________
Low-Power, Fixed and Adjustable
Reference with Shutdown in SOT23
MAX6037_12
EXITING SHUTDOWN TRANSIENT
(VOUT = 1.25V)
MAX6037 toc23
MAX6037_12 SHUTDOWN TRANSIENT
(VOUT = 1.25V)
MAX6037 toc22
+3V
VSHDN
+3V
VSHDN
GND
GND
1.25V
1.25V
VOUT
500mV/div
VOUT
500mV/div
GND
GND
COUT = 0.02µF
COUT = 0.02µF
2ms/div
10µs/div
MAX6037_41 SHUTDOWN TRANSIENT
(VOUT = 4.096V)
MAX6037_41
EXITING SHUTDOWN TRANSIENT
(VOUT = 4.096V)
MAX6037 toc25
MAX6037 toc24
+5V
+5V
VSHDN
VSHDN
GND
GND
+4.096V
+4.096V
VOUT
2V/div
VOUT
2V/div
GND
GND
COUT = 0.02µF
COUT = 0.02µF
400µs/div
10ms/div
MAX6037_25 LONG-TERM STABILITY
vs. TIME (VOUT = 2.500V)
MAX6037 toc26
2.5020
2.5015
VOUT (V)
2.5010
2.5005
2.5000
2.4995
2.4990
2.4985
TWO TYPICAL PARTS
2.4980
0
200
400
600
800
1000
TIME (HOURS)
______________________________________________________________________________________
13
MAX6037
Typical Operating Characteristics (continued)
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41;
IOUT = 0, COUT = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.)
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
Typical Operating Characteristics (continued)
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41;
IOUT = 0, COUT = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.)
MAX6037_41 OUTPUT NOISE
(0.1Hz TO 10Hz)
MAX6037_12 OUTPUT NOISE
(0.1Hz TO 10Hz)
MAX6037 toc27
MAX6037 toc28
VOUT
10µV/div
VOUT
2µV/div
VOUT = 4.096V
VOUT = 1.25V
1s/div
1s/div
Note 12: Many of the MAX6037 family Typical Operating Characteristics are extremely similar. The extremes of these characteristics
are found in the MAX6037_12 (1.25V output) and the MAX6037_41 (4.096V output). The Typical Operating Characteristics of
the remainder of the MAX6037 family typically lie between those two extremes and can be estimated based on their output
voltages.
Pin Description
PIN
NAME
FUNCTION
I.C.
Internally connected. (All fixed output
voltage options.) Do not connect anything
to this pin.
1
14
ADJ
Output Voltage Adjustment Connection.
Connect a resistor-divider between OUT,
ADJ and GND to set the output voltage.
(MAX6037_ADJ only).
2
GND
Ground
3
SHDN
Active-Low Shutdown Input. Pull SHDN
low to disable the device. Connect SHDN
to IN for normal operation.
4
IN
Supply Voltage Input. Bypass with a 0.1µF
to 1µF capacitor to GND.
5
OUT
Pin Configuration
TOP VIEW
+
I.C. (ADJ)
1
GND 2
OUT
4
IN
MAX6037
SHDN 3
( ) MAX6037_AUKADJ.
5
SOT23
Reference-Voltage Output. Connect an
output capacitor to GND in the 0.02µF to
1µF range.
______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
The MAX6037 is a family of low-dropout, micropower
voltage references. These devices all feature a shutdown mode by forcing SHDN low, dropping the quiescent current to less than 500nA. The MAX6037 can sink
and source up to 5mA with less than 410mV of dropout
voltage, making them attractive for use in low-voltage
applications. The MAX6037 is available in six fixed output voltages of 1.25V, 2.048V, 2.5V, 3.0V, 3.3V and
4.096V, and an adjustable output version for voltages
between the range of 1.184V and 5V.
MAX6037_ADJ Adjustable Output Voltage
Set the output voltage on the MAX6037_ADJ by placing
a resistor-divider network between OUT, ADJ, and GND
(See Figure 1). Use the following formula to calculate
the output voltage:
R1 ⎞
⎛
VOUT = ⎜1 +
⎟ VADJ
⎝
R2 ⎠
where VADJ = 1.184V. Set R2 = 1MΩ or less. Currents
through Resistor R1 and R2 add to the quiescent supply
current.
Shutdown
The MAX6037 features an active-low shutdown mode.
Pulling SHDN low disables the output and forces the
quiescent current to less than 500nA (typically 50pA).
Connect SHDN to IN for normal operation.
2.5V TO 5.5V INPUT
REFERENCE
OUTPUT
IN
OUT
R1
*
MAX6037_ADJ
Supply Current
The quiescent supply current of the series-mode
MAX6037 family is typically 190µA to 210µA. When the
supply voltage is below the minimum-specified input
voltage during turn-on, the device can draw up to
250µA beyond the nominal supply current. The input
voltage source must be capable of providing this current to ensure reliable turn-on.
Thermal Hysteresis
Output voltage hysteresis is the change of output voltage at T A = +25°C before and after the device is
cycled over its entire operating temperature range. The
typical thermal hysteresis value is 500ppm.
ADJ
SHDN
0.02µF
TO 1µF
GND
R2
* OPTIONAL
Figure 1. MAX6037_ADJ Typical Operating Circuit
10,000
1000
100
TEMPERATURE
COEFFICIENT
(ppm/°C)
8-BIT
10
10-BIT
12-BIT
1
14-BIT
16-BIT
0.1
18-BIT
0.01
1
10
OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C)
20-BIT
100
Figure 2. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
______________________________________________________________________________________
15
MAX6037
Detailed Description
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
Turn-On Time
These devices typically turn on and settle to within
0.1% of their final value in 360µs to 3.2ms, depending
on the device. The turn-on time can increase up to
10ms with the device operating at the minimum
dropout voltage and the maximum capacitive load.
Applications Information
Input Bypassing
For the best transient performance, decouple the input
with a 0.1µF to 1µF ceramic capacitor as shown in the
Typical Operating Circuit. Locate the capacitor as
close to IN as possible. No capacitor is necessary if
transient performance is less important.
Output/Load Capacitance
Devices in the MAX6037 family require an output capacitance in the range of 0.02µF to 1µF for frequency stability.
Temperature Coefficient vs. Operating
Temperature Range for a 1 LSB
Maximum Error
In a data converter application, the reference voltage of
the converter must stay within a certain limit to keep the
error in the data converter smaller than the resolution
limit throughout the operating temperature range.
Figure 2 shows the maximum allowable reference voltage temperature coefficient to keep the conversion
error to less than 1 LSB, as a function of the operating
temperature range (TMAX - TMIN) with the converter
resolution as a parameter. The graph assumes the reference voltage temperature coefficient as the only
parameter affecting accuracy.
In reality, the absolute static accuracy of a data converter is dependent on the combination of many parameters such as integral nonlinearity, differential
nonlinearity, offset error, gain error, as well as voltage
reference changes.
Ordering Information/Selector Guide (continued)
OUTPUT
VOLTAGE (V)
INITIAL
ACCURACY %
MAX TEMPCO
(ppm/°C)
PIN-PACKAGE
PKG
CODE
TOP
MARK
MAX6037AAUK25+T
2.5
0.2
25
5 SOT23-5
U5-2
AEJB
MAX6037BAUK25+T
2.5
0.3
50
5 SOT23-5
U5-2
AEJC
MAX6037CAUK25+T
2.5
0.5
50
5 SOT23-5
U5-2
AEJD
MAX6037AAUK30+T
3.0
0.2
25
5 SOT23-5
U5-2
AEJE
MAX6037BAUK30+T
3.0
0.3
50
5 SOT23-5
U5-2
AEJF
MAX6037CAUK30+T
3.0
0.5
50
5 SOT23-5
U5-2
AEJG
MAX6037AAUK33+T
3.3
0.2
25
5 SOT23-5
U5-2
AEJH
MAX6037BAUK33+T
3.3
0.3
50
5 SOT23-5
U5-2
AEJI
MAX6037CAUK33+T
3.3
0.5
50
5 SOT23-5
U5-2
AEJJ
MAX6037AAUK41+T
4.096
0.2
25
5 SOT23-5
U5-2
AEJK
MAX6037BAUK41+T
4.096
0.3
50
5 SOT23-5
U5-2
AEJL
MAX6037CAUK41+T
4.096
0.5
50
5 SOT23-5
U5-2
AEJM
1.184 to 5, adjustable
0.2
25
5 SOT23-5
U5-2
AEIS
MAX6037BAUKADJ+T**
1.184 to 5, adjustable
0.3
50
5 SOT23-5
U5-2
AEIT
MAX6037CAUKADJ+T**
1.184 to 5, adjustable
0.5
50
5 SOT23-5
U5-2
AEIU
PART
MAX6037AAUKADJ+T**
**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.
+Denotes a lead-free package.
T = Tape and reel.
Note: All devices are specified over the -40°C to +125°C operating temperature range.
Chip Information
TRANSISTOR COUNT: 372
PROCESS: BiCMOS
16
______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
SOT-23 5L .EPS
______________________________________________________________________________________
17
MAX6037
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
0
2/04
Initial release
1
12/07
Updating selector table
PAGES
CHANGED
—
1–7, 9, 16
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.
18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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