MAXIM MAX6029EUK50-T

19-2892; Rev 0; 7/03
Ultra-Low-Power Precision Series
Voltage Reference
Features
♦ Ultra-Low 5.25µA (max) Supply Current
♦ ±0.15% (max) Initial Accuracy
♦ 30ppm/°C (max) Temperature Coefficient
♦ 4mA Output Source Current
♦ 1mA Output Sink Current
♦ 2.5V to 12.6V Supply Range
♦ Low 200mV Dropout
♦ Stable with Capacitive Loads Up to 10µF
♦ No External Capacitors Required
♦ Miniature 5-Pin SOT23 Package
The MAX6029 provides six output voltages of 2.048V,
2.5V, 3V, 3.3V, 4.096V, and 5V. The MAX6029 is available in a 5-pin SOT23 package and is specified over
the extended temperature range (-40°C to +85°C).
Ordering Information
PART
Applications
Battery-Powered Systems
Hand-Held Instruments
TEMP RANGE
PINPACKAGE
TOP
MARK
MAX6029EUK21-T
-40°C to +85°C 5 SOT23-5
MAX6029EUK25-T
-40°C to +85°C 5 SOT23-5
AEHD
AEHF
MAX6029EUK30-T
-40°C to +85°C 5 SOT23-5
AEHH
AEHN
MAX6029EUK33-T
-40°C to +85°C 5 SOT23-5
Precision Power Supplies
MAX6029EUK41-T
-40°C to +85°C 5 SOT23-5
AEHJ
A/D and D/A Converters
MAX6029EUK50-T
-40°C to +85°C 5 SOT23-5
AEHL
Selector Guide
Pin Configuration
PIN-PACKAGE
OUTPUT
VOLTAGE (V)
MAX6029EUK21-T
5 SOT23-5
2.048
MAX6029EUK25-T
5 SOT23-5
2.500
MAX6029EUK30-T
5 SOT23-5
3.000
MAX6029EUK33-T
5 SOT23-5
3.300
MAX6029EUK41-T
5 SOT23-5
4.096
MAX6029EUK50-T
5 SOT23-5
5.000
PART
TOP VIEW
IN
1
GND 2
5
OUT
MAX6029
N.C. 3
4
N.C.
SOT23
________________________________________________________________ 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.
1
MAX6029
General Description
The MAX6029 micropower, low-dropout bandgap voltage reference combines ultra-low supply current and
low drift in a miniature 5-pin SOT23 surface-mount package that uses 70% less board space than comparable
devices in an SO package. An initial accuracy of 0.15%
and a 30ppm/°C (max) temperature coefficient make the
MAX6029 suitable for precision applications. This
series-mode voltage reference sources up to 4mA and
sinks up to 1mA of load current. A wide 2.5V to 12.6V
supply range, ultra-low 5.25µA (max) supply current,
and a low 200mV dropout voltage make these devices
ideal for battery-operated systems. Additionally, an
internal compensation capacitor eliminates the need for
an external compensation capacitor and ensures stability with load capacitances up to 10µF.
MAX6029
Ultra-Low-Power Precision Series
Voltage Reference
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +13V
OUT to GND ..............-0.3V to the lower of +6V and (VIN + 0.3V)
Output to GND Short-Circuit Duration........................Continuous
Continuous Power Dissipation (TA = +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
Operating Temperature Range ...........................-40°C to +85°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—MAX6029_21 (VOUT = 2.048V)
(VIN = 2.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2.0449
2.0480
2.0511
V
30
ppm/°C
µV/V
OUTPUT
Output Voltage
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation
Output Short-Circuit Current
VOUT
TA = +25°C
TCVOUT
(Notes 2, 3)
∆VOUT/∆VIN VIN = 2.5V to 12.6V
∆VOUT/
∆IOUT
27
200
IOUT = 0 to 4mA
0.22
0.7
IOUT = 0 to -1mA
2.4
5.5
ISC
µV/µA
60
mA
Long-Term Stability
∆VOUT/time 1000 hours at +25°C
150
ppm
Thermal Hysteresis
(Note 4)
140
ppm
f = 0.1Hz to 10Hz
30
µVP-P
f = 10Hz to 1kHz
115
µVRMS
∆VOUT/∆VIN VIN = 2.5V ±200mV, f = 120Hz
43
dB
450
µs
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
eOUT
tR
To VOUT = 0.1% of final value
INPUT
Supply Voltage Range
VIN
Supply Current
IIN
Change in Supply Current
2
IIN/VIN
2.5
VIN = 2.5V to 12.6V
_______________________________________________________________________________________
12.6
V
5.25
µA
1.5
µA/V
Ultra-Low-Power Precision Series
Voltage Reference
(VIN = 2.7V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2.4963
2.5000
2.5038
V
30
ppm/°C
µV/V
OUTPUT
Output Voltage
Output Voltage Temperature
Coefficient
VOUT
TA = +25°C
TCVOUT
(Notes 2, 3)
∆VOUT/∆VIN
Line Regulation
∆VOUT/∆IOUT
Load Regulation
Dropout Voltage (Note 5)
Output Short-Circuit Current
VIN - VOUT
30
230
IOUT = 0 to 4mA
0.1
0.6
IOUT = 0 to -1mA
2.5
6.2
IOUT = 0
100
IOUT = 4mA
200
ISC
∆VOUT/time
Long-Term Stability
VIN = 2.7V to 12.6V
Thermal Hysteresis
60
µV/µA
mV
mA
1000 hours at +25°C
150
ppm
(Note 4)
140
ppm
DYNAMIC CHARACTERISTICS
Noise Voltage
f = 0.1Hz to 10Hz
39
µVP-P
f = 10Hz to 1kHz
137
µVRMS
∆VOUT/∆VIN
VIN = 2.7V ±200mV, f = 120Hz
34
dB
tR
To VOUT = 0.1% of final value
700
ms
eOUT
Ripple Rejection
Turn-On Settling Time
INPUT
Supply Voltage Range
VIN
Supply Current
IIN
Change in Supply Current
IIN/VIN
2.7
VIN = 2.7V to 12.6V
12.6
V
5.75
µA
1.5
µA/V
_______________________________________________________________________________________
3
MAX6029
ELECTRICAL CHARACTERISTICS—MAX6029_25 (VOUT = 2.500V)
MAX6029
Ultra-Low-Power Precision Series
Voltage Reference
ELECTRICAL CHARACTERISTICS—MAX6029_30 (VOUT = 3.000V)
(VIN = 3.2V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2.9955
3.0000
3.0045
V
30
ppm/°C
µV/V
OUTPUT
Output Voltage
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation
Dropout Voltage (Note 5)
Output Short-Circuit Current
VOUT
TA = +25°C
TCVOUT
(Notes 2, 3)
∆VOUT/∆VIN VIN = 3.2V to 12.6V
∆VOUT/
∆IOUT
VIN - VOUT
15
250
IOUT = 0 to 4mA
0.1
0.6
IOUT = 0 to -1mA
2.4
6.5
IOUT = 0
100
IOUT = 4mA
200
ISC
60
µV/µA
mV
mA
Long-Term Stability
∆VOUT/time 1000 hours at +25°C
150
ppm
Thermal Hysteresis
(Note 4)
140
ppm
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
f = 0.1Hz to 10Hz
39
µVP-P
f = 10Hz to 1kHz
161
µVRMS
∆VOUT/∆VIN VIN = 3.2V ±200mV, f = 120Hz
tR
To VOUT = 0.1% of final value
37
dB
775
µs
eOUT
INPUT
Supply Voltage Range
Supply Current
Change in Supply Current
4
VIN
3.2
IIN
IIN/VIN
VIN = 3.2V to 12.6V
_______________________________________________________________________________________
12.6
V
6.75
µA
1.5
µA/V
Ultra-Low-Power Precision Series
Voltage Reference
(VIN = 3.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
OUTPUT
Output Voltage
Output Voltage Temperature
Coefficient
SYMBOL
VOUT
TA = +25°C
TCVOUT
(Notes 2, 3)
∆VOUT/∆VIN
Line Regulation
∆VOUT/∆IOUT
Load Regulation
Dropout Voltage (Note 5)
Output Short-Circuit Current
VIN - VOUT
MIN
TYP
MAX
UNITS
3.2951
3.3000
3.3050
V
30
ppm/°C
µV/V
VIN = 3.5V to 12.6V
30
270
IOUT = 0 to 4mA
0.1
0.6
IOUT = 0 to -1mA
2.4
7
IOUT = 0
100
IOUT = 4mA
200
ISC
∆VOUT/time
Long-Term Stability
CONDITIONS
Thermal Hysteresis
µV/µA
mV
60
mA
1000 hours at +25°C
150
ppm
(Note 4)
140
ppm
DYNAMIC CHARACTERISTICS
Noise Voltage
f = 0.1Hz to 10Hz
56
µVP-P
f = 10Hz to 1kHz
174
µVRMS
∆VOUT/∆VIN
VIN = 3.5V ±200mV, f = 120Hz
38
dB
tR
To VOUT = 0.1% of final value
1
ms
eOUT
Ripple Rejection
Turn-On Settling Time
INPUT
Supply Voltage Range
Supply Current
VIN
3.5
IIN
Change in Supply Current
IIN/VIN
VIN = 3.5V to 12.6V
12.6
V
7.25
µA
1.5
µA/V
_______________________________________________________________________________________
5
MAX6029
ELECTRICAL CHARACTERISTICS—MAX6029_33 (VOUT = 3.300V)
MAX6029
Ultra-Low-Power Precision Series
Voltage Reference
ELECTRICAL CHARACTERISTICS—MAX6029_41 (VOUT = 4.096V)
(VIN = 4.3V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4.0899
4.0960
4.1021
V
30
ppm/°C
µV/V
OUTPUT
Output Voltage
Output Voltage Temperature
Coefficient
VOUT
TA = +25°C
TCVOUT
(Notes 2, 3)
Line Regulation
∆VOUT/∆VIN
Load Regulation
∆VOUT/∆IOUT
Dropout Voltage (Note 5)
Output Short-Circuit Current
Long-Term Stability
VIN - VOUT
VIN = 4.3V to 12.6V
30
310
IOUT = 0 to 4mA
0.1
0.6
IOUT = 0 to -1mA
2.5
8.5
IOUT = 0
100
IOUT = 4mA
200
ISC
∆VOUT/time
Thermal Hysteresis
µV/µA
mV
60
mA
1000 hours at +25°C
150
ppm
(Note 4)
140
ppm
f = 0.1Hz to 10Hz
72
µVP-P
µVRMS
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
eOUT
f = 10Hz to 1kHz
210
∆VOUT/∆VIN
VIN = 4.3V ±200mV, f = 120Hz
36
dB
tR
To VOUT = 0.1% of final value
1.2
ms
INPUT
Supply Voltage Range
VIN
Supply Current
IIN
Change in Supply Current
6
IIN/VIN
4.3
VIN = 4.3V to 12.6V
_______________________________________________________________________________________
12.6
V
8.75
µA
1.5
µA/V
Ultra-Low-Power Precision Series
Voltage Reference
(VIN = 5.2V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4.9925
5.0000
5.0075
V
30
ppm/°C
34
375
µV/V
0.3
0.8
3.3
9
OUTPUT
Output Voltage
Output Voltage Temperature
Coefficient
VOUT
TA = +25°C
TCVOUT
(Notes 2, 3)
∆VOUT/∆VIN VIN = 5.2V to 12.6V
IOUT = 0 to 4mA
∆VOUT/
∆IOUT
IOUT = 0 to -1mA
Line Regulation
Load Regulation
Dropout Voltage (Note 5)
Output Short-Circuit Current
VIN - VOUT
IOUT = 0
100
IOUT = 4mA
200
ISC
µV/µA
mV
60
mA
Long-Term Stability
∆VOUT/time 1000 hours at +25°C
150
ppm
Thermal Hysteresis
(Note 4)
140
ppm
f = 0.1Hz to 10Hz
90
µVP-P
f = 10Hz to 1kHz
245
µVRMS
∆VOUT/∆VIN VIN = 5.2V ±200mV, f = 120Hz
38
dB
1.4
ms
DYNAMIC CHARACTERISTICS
Noise Voltage
eOUT
Ripple Rejection
Turn-On Settling Time
tR
To VOUT = 0.1% of final value
INPUT
Supply Voltage Range
VIN
Supply Current
IIN
Change in Supply Current
IIN/VIN
5.2
VIN = 5.2V to 12.6V
12.6
V
10.5
µA
1.5
µA/V
MAX6029 is 100% production tested at TA = +25°C and is guaranteed by design for TA = TMIN to TMAX as specified.
Temperature coefficient is defined by box method: (VMAX - VMIN)/(∆T ✕ V+25°C).
Not production tested. Guaranteed by design.
Thermal hysteresis is defined as the change in TA = +25°C output voltage before and after temperature cycling of the
device (from TA = TMIN to TMAX). Initial measurement at TA = +25°C is followed by temperature cycling the device to TA =
+85°C then to TA = -40°C and another measurement at TA = +25°C is compared to the original measurement at TA = +25°C.
Note 5: Dropout voltage is the minimum input voltage at which VOUT changes by 0.1% from VOUT at rated VIN and is guaranteed by
Load Regulation Test.
Note 1:
Note 2:
Note 3:
Note 4:
_______________________________________________________________________________________
7
MAX6029
ELECTRICAL CHARACTERISTICS—MAX6029_50 (VOUT = 5.000V)
Typical Operating Characteristics
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless
otherwise noted.)
2.044
5.006
2.999
2.997
2.995
MAX6029 toc03
3 TYPICAL UNITS
3.001
OUTPUT VOLTAGE (V)
2.046
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 5V)
3 TYPICAL UNITS
5.004
5.002
OUTPUT VOLTAGE (V)
3 TYPICAL UNITS
2.048
OUTPUT VOLTAGE (V)
3.003
MAX6029 toc01
2.050
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 3V)
MAX6029 toc02
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 2.048V)
5.000
4.998
4.996
4.994
4.992
2.042
2.993
4.990
2.040
2.991
-40
-15
10
35
85
60
-15
10
-40
85
60
-15
10
35
60
85
TEMPERATURE (°C)
SUPPLY CURRENT vs. INPUT VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
DROPOUT VOLTAGE vs. SOURCE CURRENT
(VOUT = 2.048V)
VOUT = 3V
VOUT = 2.048V
4
5.5
VOUT = 3V
5.0
4.5
4.0
VOUT = 2.048V
3.5
VOUT = 5V
0.14
0.10
0.08
0.06
0.02
0
2.5
0 1 2 3 4 5 6 7 8 9 10 11 12 13
0.12
0.04
3.0
0
MAX6029 toc06
VOUT = 5V
DROPOUT VOLTAGE (V)
SUPPLY CURRENT (µA)
8
6
6.5
6.0
0.16
MAX6029 toc05
7.0
MAX6029 toc04
10
2
-40
-15
10
35
0
85
60
1
2
3
4
5
INPUT VOLTAGE (V)
TEMPERATURE (°C)
SOURCE CURRENT (mA)
DROPOUT VOLTAGE vs. SOURCE CURRENT
(VOUT = 3V)
DROPOUT VOLTAGE vs. SOURCE CURRENT
(VOUT = 5V)
LOAD REGULATION
(VOUT = 2.048V)
0.08
0.07
0.06
0.05
0.04
0.03
0.07
0.06
0.05
0.04
0.03
2.0515
2.0510
2.0505
2.0500
2.0495
2.0490
2.0485
0.02
2.0480
0.01
0.01
2.0475
0
0
0.02
0
1
2
3
4
5
SOURCE CURRENT (mA)
6
7
MAX6029 toc09
0.08
DROPOUT VOLTAGE (V)
0.09
7
6
2.0520
OUTPUT VOLTAGE (V)
0.10
MAX6029 toc08
0.09
MAX6029 toc07
0.11
8
35
TEMPERATURE (°C)
12
SUPPLY CURRENT (µA)
4.988
-40
TEMPERATURE (°C)
14
DROPOUT VOLTAGE (V)
MAX6029
Ultra-Low-Power Precision Series
Voltage Reference
2.0470
0
1
2
3
4
5
SOURCE CURRENT (mA)
6
7
-2
-1
0
1
2
3
4
OUTPUT CURRENT (mA)
_______________________________________________________________________________________
5
6
7
Ultra-Low-Power Precision Series
Voltage Reference
LOAD REGULATION
(VOUT = 3V)
3.0045
2.04784
2.04782
2.04780
2.04778
3.0040
3.0035
3.0030
3.0025
2.04776
3.0020
2.04774
3.0015
2.04772
5.5
7.0
8.5
10.0
11.5
13.0
-1
0
1
3
4
5
LOAD REGULATION
(VOUT = 5V)
LINE REGULATION
(VOUT = 5V)
MAX6029 toc13
5.0030
5.0025
5.0020
3
5.00070
2
3
4
5
6
10 11 12 13
0
-10
-30
-60
5
7
6
7
8
9
10
11
12
13
0.1
INPUT VOLTAGE (V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 3V)
1
10
1000
100
FREQUENCY (kHz)
LINE-TRANSIENT RESPONSE
(VOUT = 2.048V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 5V)
MAX6029 toc18
MAX6029 toc17
0
MAX6029 toc16
-10
9
-50
OUTPUT CURRENT (mA)
0
8
-40
5.00064
1
7
-20
5.00072
5.00066
0
6
POWER-SUPPLY REJECTION RATIO vs.
FREQUENCY (VOUT = 2.048V)
5.00074
5.0010
-1
5
5.00076
5.00068
-2
4
INPUT VOLTAGE (V)
5.00078
5.0015
5.0005
7
PSRR (dB)
5.0035
6
5.00080
OUTPUT VOLTAGE (V)
5.0040
-5
-10
3V
VIN
200mV/div
AC-COUPLED
-15
PSRR (dB)
-20
PSRR (dB)
2
OUTPUT CURRENT (mA)
5.0045
OUTPUT VOLTAGE (V)
3.00155
-2
INPUT VOLTAGE (V)
5.0050
3.00165
MAX6029 toc14
4.0
3.00170
3.00160
3.0010
2.5
3.00175
MAX6029 toc15
2.04786
MAX6029 toc11
3.0050
OUTPUT VOLTAGE (V)
2.04788
3.00180
OUTPUT VOLTAGE (V)
2.04790
OUTPUT VOLTAGE (V)
3.0055
MAX6029 toc10
2.04792
LINE REGULATION
(VOUT = 3V)
MAX6029 toc12
LINE REGULATION
(VOUT = 2.048V)
MAX6029
Typical Operating Characteristics (continued)
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless
otherwise noted.)
-30
-40
2.5V
-20
-25
-30
-35
VOUT
200mV/div
AC-COUPLED
2.048V
-40
-50
-45
-60
-50
0.1
1
10
FREQUENCY (kHz)
100
1000
0.1
1
10
100
1000
200µs/div
FREQUENCY (kHz)
_______________________________________________________________________________________
9
MAX6029
Ultra-Low-Power Precision Series
Voltage Reference
Typical Operating Characteristics (continued)
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless
otherwise noted.)
LINE-TRANSIENT RESPONSE
(VOUT = 3V)
LINE-TRANSIENT RESPONSE
(VOUT = 5V)
MAX6029 toc19
3.7V
MAX61029 toc20
VIN
200mV/div
AC-COUPLED
3.2V
5.7V
VIN
200mV/div
AC-COUPLED
5.2V
VOUT
100mV/div
AC-COUPLED
5V
VOUT
200mV/div
AC-COUPLED
3V
200µs/div
200µs/div
LOAD-TRANSIENT RESPONSE
(SOURCING, VOUT = 2.048V)
LOAD-TRANSIENT RESPONSE
(SINKING, VOUT = 2.048V)
MAX6029 toc21
MAX6029 toc22
COUT = 0
COUT = 0
IOUT
10mA/div
4mA
0
VOUT
500mV/div
AC-COUPLED
2.048V
IOUT
2mA/div
0
-1mA
VOUT
500mV/div
AC-COUPLED
2.048V
100µs/div
1ms/div
LOAD-TRANSIENT RESPONSE
(SOURCING, VOUT = 2.048V)
LOAD-TRANSIENT RESPONSE
(SINKING, VOUT = 2.048V)
MAX6029 toc23
MAX6029 toc24
COUT = 1µF
COUT = 1µF
IOUT
10mA/div
4mA
0
VOUT
500mV/div
AC-COUPLED
2.048V
400µs/div
10
0
-1mA
IOUT
2mA/div
VOUT
500mV/div
AC-COUPLED
2.048V
1ms/div
______________________________________________________________________________________
Ultra-Low-Power Precision Series
Voltage Reference
LOAD-TRANSIENT RESPONSE
(SOURCING, VOUT = 5V)
LOAD-TRANSIENT RESPONSE
(SINKING, VOUT = 5V)
MAX6029 toc25
MAX6029 toc26
COUT = 0
COUT = 0
IOUT
10mA/div
4mA
0
0
IOUT
1mA/div
-1mA
VOUT
500mV/div
AC-COUPLED
5V
VOUT
1V/div
AC-COUPLED
5V
400µs/div
2ms/div
LOAD-TRANSIENT RESPONSE
(SOURCING, VOUT = 5V)
LOAD-TRANSIENT RESPONSE
(SINKING, VOUT = 5V)
6029 toc27
MAX6029 toc28
COUT = 1µF
COUT = 1µF
IOUT
10mA/div
4mA
0
0
IOUT
1mA/div
-1mA
VOUT
200mV/div
AC-COUPLED
6V
VOUT
1V/div
AC-COUPLED
5V
400µs/div
2ms/div
TURN-ON TRANSIENT
(VOUT = 2.048V)
TURN-ON TRANSIENT
(VOUT = 3V)
MAX6029 toc29
2.5V
MAX6029 toc30
VIN
1V/div
3.2V
VIN
2V/div
0
0
3V
2.048V
VOUT
1V/div
VOUT
1V/div
0
0
200µs/div
200µs/div
______________________________________________________________________________________
11
MAX6029
Typical Operating Characteristics (continued)
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless
otherwise noted.)
Typical Operating Characteristics (continued)
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless
otherwise noted.)
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 2.048V)
TURN-ON TRANSIENT
(VOUT = 5V)
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 3V)
MAX6029 toc32
MAX6029 toc31
MAX6029 toc33
5.2V
VIN
2V/div
VOUT
10µV/div
VOUT
10µV/div
0
5V
VOUT
2V/div
0
1s/div
400µs/div
1s/div
NOISE vs. FREQUENCY
(VOUT = 2.048V)
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 5V)
MAX6029 toc34
MAX6029 toc35
4.0
VOUT
20µV/div
NOISE (µVRMS/√Hz)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
1s/div
10
20
30
40
50
FREQUENCY (kHz)
NOISE vs. FREQUENCY
(VOUT = 5V)
NOISE vs. FREQUENCY
(VOUT = 3V)
MAX6029 toc37
18
16
14
12
10
8
6
4
2
0
0
10
20
30
FREQUENCY (kHz)
12
20
MAX6029 toc36
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
NOISE (µVRMS/√Hz)
NOISE (µVRMS/√Hz)
MAX6029
Ultra-Low-Power Precision Series
Voltage Reference
40
50
0
10
20
30
40
FREQUENCY (kHz)
______________________________________________________________________________________
50
Ultra-Low-Power Precision Series
Voltage Reference
PIN
NAME
1
IN
FUNCTION
2
GND
Ground
3, 4
N.C.
No Connection. Leave unconnected or
connect to ground.
5
OUT
Reference Output
Positive Voltage Supply
age source only when required, so supply current is not
wasted and efficiency is maximized at all input voltages. This improved efficiency reduces power dissipation and extends battery life.
Output Thermal Hysteresis
Applications Information
Input Bypassing
The MAX6029 does not require an input bypass capacitor. For improved transient performance, bypass the
input to ground with a 0.1µF ceramic capacitor. Place
the capacitor as close to IN as possible.
Load Capacitance
The MAX6029 does not require an output capacitor for
stability. The MAX6029 is stable driving capacitive
loads from 0 to 100pF and 0.1µF to 10µF when sourcing current and from 0 to 0.4µF when sinking current. In
applications where the load or the supply can experience step changes, an output capacitor reduces the
amount of overshoot (undershoot) and improves the circuit’s transient response. Many applications do not
require an external capacitor, and the MAX6029 offers
a significant advantage in applications where board
space is critical.
Output thermal hysteresis is the change of 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 device.
Temperature Coefficient vs. Operating
Temperature Range for a 1LSB
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 through the operating temperature range. Figure 1
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.
Supply Current
Turn-On Time
The quiescent supply current of the series-mode
MAX6029 is very small, 5.25µA (max), and is very stable against changes in the supply voltage with only
1.5µA/V (max) variation with supply voltage. The
MAX6029 family draws load current from the input volt-
These devices turn on and settle to within 0.1% of their
final value in less than 1ms. The turn-on time increases
when heavily loaded and operating close to dropout.
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 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
______________________________________________________________________________________
13
MAX6029
Pin Description
Ultra-Low-Power Precision Series
Voltage Reference
MAX6029
Typical Operating Circuit
VIN = 2.5V TO 12.6V
Chip Information
TRANSISTOR COUNT: 30
PROCESS: BiCMOS
*
IN
MAX6029
OUT
GND
*CAPACITOR IS OPTIONAL.
14
______________________________________________________________________________________
Ultra-Low-Power Precision Series
Voltage Reference
SOT-23 5L .EPS
PACKAGE OUTLINE, SOT-23, 5L
21-0057
E
1
1
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.
15 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX6029
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.)