19-2606; Rev 1; 5/03
High-Supply-Voltage, Precision
Voltage Reference in SOT23
General Description
The MAX6035 is a high-voltage, precision micropower
voltage reference. This three-terminal device is available
with output voltage options of 2.5V, 3.0V, and 5.0V. It is an
excellent upgrade for industry-standard devices such as
the REF02 and REF43. The MAX6035 offers 14x lower
power than the REF02 and 5x lower power than the
REF43, as well as a reduced package size from an 8-pin
SO to a 3-pin SOT23. The MAX6035 features a proprietary
temperature coefficient curvature-correction circuit and
laser-trimmed, thin-film resistors that result in a very low
temperature coefficient of 25ppm/°C (max) and an initial
accuracy of ±0.2% (max).
The MAX6035 typically draws only 73µA of supply cur-
rent and can source 10mA or sink 2mA of load current.
Unlike conventional shunt-mode (two-terminal) refer-
ences that waste supply current and require an external
resistor, this device offers a supply current that is virtu-
ally independent of the supply voltage and does not
require an external resistor. Additionally, this internally
compensated device does not require an external com-
pensation capacitor, but is also stable with capacitive
loads up to 5µF. Eliminating the external compensation
capacitor saves valuable board area in space-critical
applications. The supply independent, ultra-low supply
current makes this device ideal for battery-operated,
high-performance systems.
The MAX6035 is available in a 3-pin SOT23 package
and is specified for operation from -40°C to +125°C.
Features
o
Wide Supply Voltage Range: Up to 33V
o
25ppm/°C (max) Temperature Coefficient
(-40°C to +85°C)
o
±0.2% (max) Initial Accuracy
o
Small 3-Pin SOT23 Package
o
o
o
o
95µA (max) Quiescent Supply Current
10mA Source Current, 2mA Sink Current
No Output Capacitor Required
Stable with Capacitive Loads up to 5µF
MAX6035
o
Output Voltages: 2.5V, 3.0V, 5.0V
Ordering Information
PART
MAX6035AAUR25-T
MAX6035BAUR25-T
MAX6035AAUR30-T
MAX6035BAUR30-T
MAX6035AAUR50-T
MAX6035BAUR50-T
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
TOP
MARK
3 SOT23-3 FZMW
3 SOT23-3 FZMX
3 SOT23-3 FZMY
3 SOT23-3 FZMZ
3 SOT23-3 FZNA
3 SOT23-3 FZNB
Selector Guide
PART
MAXIMUM
MAXIMUM
OUTPUT
INITIAL
TEMPCO
VOLTAGE
ACCURACY
(ppm/°C)
(V)
(%)
(-40°C to +85°C)
25
65
25
65
25
65
0.20
0.50
0.20
0.50
0.20
0.50
2.5
2.5
3.0
3.0
5.0
5.0
Applications
4mA to 20mA Industrial
Control Loops
Li+ Battery Chargers
12-Bit A/D and D/A
Converters
Digital Multimeters
Portable Data-Acquisition
Systems
Low-Power Test
Equipment
MAX6035AAUR25
MAX6035BAUR25
MAX6035AAUR30
MAX6035BAUR30
MAX6035AAUR50
MAX6035BAUR50
Typical Operating Circuit
+SUPPLY INPUT (SEE
SELECTOR GUIDE)
Pin Configuration
IN
OUT
0.1µF*
REFERENCE
OUT
TOP VIEW
IN
1
MAX6035
MAX6035
GND
OUT
2
3
GND
*CAPACITOR IS OPTIONAL.
SOT23
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.
High-Supply-Voltage, Precision
Voltage Reference in SOT23
MAX6035
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND)
IN ............................................................................-0.3V to +36V
OUT .............................................................-0.3V to (V
IN
+ 0.3V)
OUT Short-Circuit Duration to GND or IN (Note 1).....Continuous
Current into Any Pin..........................................................±20mA
Continuous Power Dissipation
3-Pin SOT23 (derate 4.0mW/°C above +70°C)............320mW
Note 1:
Continuous power dissipation should also be observed.
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.
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 (2.5V)
(V
IN
= 5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Output Voltage
SYMBOL
V
OUT
T
A
= +25°C
T
A
= 0°C to +70°C
Output Voltage
Temperature Coefficient
(Note 3)
TCV
OUT
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
Line Regulation (Note 4)
∆V
OUT
/∆V
IN
(V
OUT
+ 2V)
≤
V
IN
≤
33V
CONDITIONS
MAX6035A (0.2%)
MAX6035B (0.5%)
MAX6035A
MAX6035B
MAX6035A
MAX6035B
MAX6035A
MAX6035B
T
A
= +25°C
T
A
= -40°C to +125°C
Sourcing:
0
≤
I
OUT
≤
10mA
Sinking:
-2mA
≤
I
OUT
≤
0
Sourcing:
0
≤
I
OUT
≤
10mA
Sinking:
-2mA
≤
I
OUT
≤
0
27
-4
1.9
2.25
25
45
4
MIN
2.4950
2.4875
TYP
2.5000
2.5000
MAX
2.5050
2.5125
20
50
25
65
30
75
15
20
70
180
µV/mA
85
225
mA
V
µV/V
ppm/°C
UNITS
V
T
A
= +25°C
Load Regulation (Note 4)
∆V
OUT
/
∆I
OUT
T
A
= -40°C to +125°C
OUT Short-Circuit Current
Dropout Voltage (Note 7)
I
SC
V
IN
- V
OUT
Short to GND
Short to IN
I
OUT
= 10µA
I
OUT
= 10mA
2
_______________________________________________________________________________________
High-Supply-Voltage, Precision
Voltage Reference in SOT23
ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 (2.5V) (continued)
(V
IN
= 5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Thermal Hysteresis (Note 5)
Long-Term Stability
SYMBOL
∆V
OUT
/cycle
∆V
OUT
/time 1000hr at +25°C
CONDITIONS
MIN
TYP
135
110
MAX
UNITS
ppm
ppm/
1000hr
µV
P-P
µV
RMS
dB
µs
5
µF
MAX6035
DYNAMIC CHARACTERISTICS
Output Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability
(Note 6)
INPUT CHARACTERISTICS
Supply Voltage Range
Quiescent Supply Current
Change in Supply Current
V
IN
I
IN
∆I
IN
/∆V
IN
4.4V
≤
V
IN
≤
33V
Inferred from line regulation and dropout voltage
4.4
73
0.4
33
95
0.7
V
µA
µA/V
e
n
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To V
OUT
= 0.1%
of final value
C
OUT
= 50pF
C
OUT
= 1µF
0
21
20
86
35
240
∆V
OUT
/∆V
IN
V
IN
= 5V ±100mV, f = 120Hz
t
R
C
OUT
ELECTRICAL CHARACTERISTICS—MAX6035_AUR30 (3.0V)
(V
IN
= 5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Output Voltage
SYMBOL
V
OUT
T
A
= +25°C
T
A
= 0°C to +70°C
Output Voltage
Temperature Coefficient
(Note 3)
TCV
OUT
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
∆V
OUT
/
∆V
IN
(V
OUT
+ 1.75V)
≤
V
IN
≤
33V
(V
OUT
+ 2V)
≤
V
IN
≤
33V
CONDITIONS
MAX6035A (0.2%)
MAX6035B (0.5%)
MAX6035A
MAX6035B
MAX6035A
MAX6035B
MAX6035A
MAX6035B
T
A
= +25°C
T
A
= 0°C to +125°C
T
A
= -40°C to +125°C
Sourcing:
0
≤
I
OUT
≤
10mA
Sinking:
-2mA
≤
I
OUT
≤
0mA
Sourcing:
0
≤
I
OUT
≤
10mA
Sinking:
-2mA
≤
I
OUT
≤
0mA
30
54
4.5
MIN
2.9940
2.9850
TYP
3.0000
3.0000
MAX
3.0060
3.0150
20
50
25
65
30
75
15
24
24
81
170
µV/mA
96
230
µV/V
ppm/°C
UNITS
V
Line Regulation (Note 4)
T
A
= +25°C
Load Regulation (Note 4)
∆V
OUT
/
∆I
OUT
T
A
= -40°C to +125°C
_______________________________________________________________________________________
3
High-Supply-Voltage, Precision
Voltage Reference in SOT23
MAX6035
ELECTRICAL CHARACTERISTICS—MAX6035_AUR30 (3.0V) (continued)
(V
IN
= 5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
OUT Short-Circuit Current
SYMBOL
I
SC
Short to GND
Short to IN
T
A
= 0°C to +125°C
Dropout Voltage (Note 7)
Thermal Hysteresis (Note 5)
Long-Term Stability
V
IN
- V
OUT
∆V
OUT
/cycle
∆V
OUT
/time 1000hr at +25°C
T
A
= -40°C to +125°C
I
OUT
= 10µA
I
OUT
= 10µA
I
OUT
= 10mA
135
120
CONDITIONS
MIN
TYP
27
-4
1.75
1.9
2.25
ppm
ppm/
1000hr
µV
P-P
µV
RMS
dB
µs
5
µF
V
MAX
UNITS
mA
DYNAMIC CHARACTERISTICS
Output Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability
(Note 6)
INPUT CHARACTERISTICS
T
A
= 0°C to +125°C, inferred from line regulation
and dropout voltage
Supply Voltage Range
V
IN
T
A
= -40°C to +125°C, inferred from line
regulation and dropout voltage
4.9V
≤
V
IN
≤
33V
4.75
4.9
73
0.4
33
V
33
95
0.7
µA
µA/V
e
n
∆V
OUT
/
∆V
IN
t
R
C
OUT
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
V
IN
= 5V ±100mV, f = 120Hz
V
OUT
= 0.1% of final value
C
OUT
= 50pF
C
OUT
= 1µF
0
25
25
80
40
250
Quiescent Current Supply
Change in Supply Current
I
IN
∆I
IN
/∆V
IN
ELECTRICAL CHARACTERISTICS—MAX6035_AUR50 (5.0V)
(V
IN
= 5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Output Voltage
SYMBOL
V
OUT
T
A
= +25°C
T
A
= 0°C to +70°C
Output Voltage
Temperature Coefficient
(Note 3)
TCV
OUT
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
Line Regulation (Note 4)
∆V
OUT
/∆V
IN
(V
OUT
+ 2V)
≤
V
OUT
≤
33V
CONDITIONS
MAX6035A (0.2%)
MAX6035B (0.5%)
MAX6035A
MAX6035B
MAX6035A
MAX6035B
MAX6035A
MAX6035B
T
A
= +25°C
T
A
= -40°C to +125°C
7.5
8
MIN
4.9900
4.9750
TYP
5.0000
5.0000
MAX
5.0100
5.0250
20
50
25
65
30
75
25
40
µV/V
ppm/°C
UNITS
V
4
_______________________________________________________________________________________
High-Supply-Voltage, Precision
Voltage Reference in SOT23
ELECTRICAL CHARACTERISTICS—MAX6035_AUR50 (5.0V) (continued)
(V
IN
= 5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
Sourcing:
0
≤
I
OUT
≤
10mA
Sinking:
-2mA
≤
I
OUT
≤
0mA
Sourcing:
0
≤
I
OUT
≤
10mA
Sinking:
-2mA
≤
I
OUT
≤
0mA
27
-4
1.9
2.25
135
160
MIN
TYP
50
90
MAX
135
215
µV/mA
160
300
mA
V
ppm
ppm/
1000hr
µV
P-P
µV
RMS
dB
µs
5
µF
UNITS
MAX6035
T
A
= +25°C
Load Regulation (Note 4)
∆V
OUT
/
∆I
OUT
T
A
= -40°C to +125°C
OUT Short-Circuit Current
Dropout Voltage (Note 7)
Thermal Hysteresis (Note 5)
Long-Term Stability
I
SC
V
IN
- V
OUT
∆V
OUT
/cycle
Shorted to GND
Shorted to IN
I
OUT
= 10µA
I
OUT
= 10mA
∆V
OUT
/time 1000hr at +25°C
DYNAMIC CHARACTERISTICS
Output Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability
(Note 6)
INPUT CHARACTERISTICS
Supply Voltage Range
Quiescent Current Supply
Change in Supply Current
V
IN
I
IN
∆I
IN
/∆V
IN
6.9V
≤
V
IN
≤
33V
Inferred by line regulation and dropout voltage
6.9
80
0.4
33
100
0.7
V
µA
µA/V
e
n
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
68
48
72
140
300
0
∆V
OUT
/∆V
IN
V
IN
= 15V ±100mV, f = 120Hz
C
OUT
= 50pF
To V
OUT
= 0.1% of final
t
R
value
C
OUT
= 1µF
C
OUT
Note 2:
All devices are 100% production tested at T
A
= +25°C and are guaranteed by design for T
A
= T
MIN
to T
MAX
, as specified.
Note 3:
Temperature Coefficient is measured by the “box” method, i.e., the maximum
∆V
OUT
is divided by the maximum
∆T.
Note 4:
Line and load regulation are measured with pulses and do not include output voltage fluctuation due to die-temperature
changes.
Note 5:
Thermal Hysteresis is defined as the change in the output voltage at T
A
= +25°C before and after cycling the device from
T
MAX
to T
MIN
.
Note 6:
Guaranteed by design.
Note 7:
Although the source current is guaranteed to be 10mA, exercise caution to ensure that the package’s absolute power dissi-
pation rating is not exceeded.
_______________________________________________________________________________________
5
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