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 73A 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 5F. 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 -40C to +125C.
Applications
Features
o Wide Supply Voltage Range: Up to 33V
o 25ppm/C (max) Temperature Coefficient
(-40C to +85C)
o 0.2% (max) Initial Accuracy
o Small 3-Pin SOT23 Package
o 95A (max) Quiescent Supply Current
o 10mA Source Current, 2mA Sink Current
o No Output Capacitor Required
o Stable with Capacitive Loads up to 5F
o Output Voltages: 2.5V, 3.0V, 5.0V
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-2606; Rev 1; 5/03
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.
PART
TEMP RANGE
PIN -
PA C K A G E
TOP
MARK
MAX6035AAUR25-T
-40C to +125C
3 SOT23-3
FZMW
MAX6035BAUR25-T
-40C to +125C
3 SOT23-3
FZMX
MAX6035AAUR30-T
-40C to +125C
3 SOT23-3
FZMY
MAX6035BAUR30-T
-40C to +125C
3 SOT23-3
FZMZ
MAX6035AAUR50-T
-40C to +125C
3 SOT23-3
FZNA
MAX6035BAUR50-T
-40C to +125C
3 SOT23-3
FZNB
PART
MAXIMUM
TEMPCO
(ppm/C)
(-40C to +85C)
MAXIMUM
INITIAL
ACCURACY
(%)
OUTPUT
VOLTAGE
(V)
MAX6035AAUR25
25
0.20
2.5
MAX6035BAUR25
65
0.50
2.5
MAX6035AAUR30
25
0.20
3.0
MAX6035BAUR30
65
0.50
3.0
MAX6035AAUR50
25
0.20
5.0
MAX6035BAUR50
65
0.50
5.0
Selector Guide
OUT
1
3
GND
IN
MAX6035
SOT23
TOP VIEW
2
Pin Configuration
MAX6035
0.1
F*
*CAPACITOR IS OPTIONAL.
REFERENCE
OUT
OUT
IN
GND
+SUPPLY INPUT (SEE SELECTOR GUIDE)
Typical Operating Circuit
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
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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
= +25C.) (Note 2)
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.
(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 +70C)............320mW
Operating Temperature Range .........................-40C to +125C
Storage Temperature Range .............................-65C to +150C
Junction Temperature ......................................................+150C
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6035A (0.2%)
2.4950
2.5000
2.5050
Output Voltage
V
OUT
T
A
= +25C
MAX6035B (0.5%)
2.4875
2.5000
2.5125
V
MAX6035A
20
T
A
= 0C to +70C
MAX6035B
50
MAX6035A
25
T
A
= -40C to +85C
MAX6035B
65
MAX6035A
30
Output Voltage
Temperature Coefficient
(Note 3)
TCV
OUT
T
A
= -40C to +125C
MAX6035B
75
ppm/C
T
A
= +25C
4
15
Line Regulation (Note 4)
V
OUT
/
V
IN
(V
OUT
+ 2V)
V
IN
33V
T
A
= -40C to +125C
20
V/V
Sourcing:
0
I
OUT
10mA
25
70
T
A
= +25C
Sinking:
-2mA
I
OUT
0
45
180
Sourcing:
0
I
OUT
10mA
85
Load Regulation (Note 4)
V
OUT
/
I
OUT
T
A
= -40C to +125C
Sinking:
-2mA
I
OUT
0
225
V/mA
Short to GND
27
OUT Short-Circuit Current
I
SC
Short to IN
-4
mA
I
OUT
= 10A
1.9
Dropout Voltage (Note 7)
V
IN
- V
OUT
I
OUT
= 10mA
2.25
V
Note 1: Continuous power dissipation should also be observed.
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
_______________________________________________________________________________________
3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Thermal Hysteresis (Note 5)
V
OU T
/cycl e
135
ppm
Long-Term Stability
V
OUT
/time
1000hr at +25C
110
ppm/
1000hr
DYNAMIC CHARACTERISTICS
f = 0.1Hz to 10Hz
21
V
P-P
Output Noise Voltage
e
n
f = 10Hz to 1kHz
20
V
RMS
Ripple Rejection
V
OUT
/
V
IN
V
IN
= 5V 100mV, f = 120Hz
86
dB
C
OUT
= 50pF
35
Turn-On Settling Time
t
R
To V
OUT
= 0.1%
of final value
C
OUT
= 1F
240
s
Capacitive-Load Stability
(Note 6)
C
OUT
0
5
F
INPUT CHARACTERISTICS
Supply Voltage Range
V
IN
Infer r ed fr om l i ne r eg ul ati on and d r op out vol tag e
4.4
33
V
Quiescent Supply Current
I
IN
73
95
A
Change in Supply Current
I
IN
/
V
IN
4.4V
V
IN
33V
0.4
0.7
A/V
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
= +25C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6035A (0.2%)
2.9940
3.0000
3.0060
Output Voltage
V
OUT
T
A
= +25C
MAX6035B (0.5%)
2.9850
3.0000
3.0150
V
MAX6035A
20
T
A
= 0C to +70C
MAX6035B
50
MAX6035A
25
T
A
= -40C to +85C
MAX6035B
65
MAX6035A
30
Output Voltage
Temperature Coefficient
(Note 3)
TCV
OUT
T
A
= -40C to +125C
MAX6035B
75
ppm/C
T
A
= +25C
4.5
15
( V
OU T
+ 1.75V )
V
I N
33V
T
A
= 0C to +125C
24
Line Regulation (Note 4)
V
OUT
/
V
IN
(V
OUT
+ 2V)
V
IN
33V
T
A
= -40C to +125C
24
V/V
Sourcing:
0
I
OUT
10mA
30
81
T
A
= +25C
Sinking:
-2mA
I
OUT
0mA
54
170
Sourcing:
0
I
OUT
10mA
96
Load Regulation (Note 4)
V
OUT
/
I
OUT
T
A
= -40C to +125C
Sinking:
-2mA
I
OUT
0mA
230
V/mA
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
= +25C.) (Note 2)
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
4
_______________________________________________________________________________________
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Short to GND
27
OUT Short-Circuit Current
I
SC
Short to IN
-4
mA
T
A
= 0C to +125C
I
OUT
= 10A
1.75
I
OUT
= 10A
1.9
Dropout Voltage (Note 7)
V
IN
- V
OUT
T
A
= -40C to +125C
I
OUT
= 10mA
2.25
V
Thermal Hysteresis (Note 5)
V
OU T
/cycl e
135
ppm
Long-Term Stability
V
OUT
/time
1000hr at +25C
120
ppm/
1000hr
DYNAMIC CHARACTERISTICS
f = 0.1Hz to 10Hz
25
V
P-P
Output Noise Voltage
e
n
f = 10Hz to 1kHz
25
V
RMS
Ripple Rejection
V
OUT
/
V
IN
V
IN
= 5V 100mV, f = 120Hz
80
dB
C
OUT
= 50pF
40
Turn-On Settling Time
t
R
V
OUT
= 0.1% of final value
C
OUT
= 1F
250
s
Capacitive-Load Stability
(Note 6)
C
OUT
0
5
F
INPUT CHARACTERISTICS
T
A
= 0C to +125C, inferred from line regulation
and dropout voltage
4.75
33
Supply Voltage Range
V
IN
T
A
= -40C to +125C, inferred from line
regulation and dropout voltage
4.9
33
V
Quiescent Current Supply
I
IN
73
95
A
Change in Supply Current
I
IN
/
V
IN
4.9V
V
IN
33V
0.4
0.7
A/V
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
= +25C.) (Note 2)
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
= +25C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6035A (0.2%)
4.9900
5.0000
5.0100
Output Voltage
V
OUT
T
A
= +25C
MAX6035B (0.5%)
4.9750
5.0000
5.0250
V
MAX6035A
20
T
A
= 0C to +70C
MAX6035B
50
MAX6035A
25
T
A
= -40C to +85C
MAX6035B
65
MAX6035A
30
Output Voltage
Temperature Coefficient
(Note 3)
TCV
OUT
T
A
= -40C to +125C
MAX6035B
75
ppm/C
T
A
= + 25C 7.5
25
Line Regulation (Note 4)
V
OUT
/
V
IN
(V
OUT
+ 2V)
V
OUT
33V
T
A
= - 40C to + 125C 8
40
V/V
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
_______________________________________________________________________________________
5
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
= +25C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Sourcing:
0
I
OUT
10mA
50
135
T
A
= +25C
Sinking:
-2mA
I
OUT
0mA
90
215
Sourcing:
0
I
OUT
10mA
160
Load Regulation (Note 4)
V
OUT
/
I
OUT
T
A
= -40C to +125C
Sinking:
-2mA
I
OUT
0mA
300
V/mA
Shorted to GND
27
OUT Short-Circuit Current
I
SC
Shorted to IN
-4
mA
I
OUT
= 10A
1.9
Dropout Voltage (Note 7)
V
IN
- V
OUT
I
OUT
= 10mA
2.25
V
Thermal Hysteresis (Note 5)
V
OU T
/cycl e
135
ppm
Long-Term Stability
V
OUT
/time
1000hr at +25C
160
ppm/
1000hr
DYNAMIC CHARACTERISTICS
f = 0.1Hz to 10Hz
68
V
P-P
Output Noise Voltage
e
n
f = 10Hz to 1kHz
48
V
RMS
Ripple Rejection
V
OUT
/
V
IN
V
IN
= 15V 100mV, f = 120Hz
72
dB
C
OUT
= 50pF
140
Turn-On Settling Time
t
R
To V
OUT
= 0.1% of final
value
C
OUT
= 1F
300
s
Capacitive-Load Stability
(Note 6)
C
OUT
0
5
F
INPUT CHARACTERISTICS
Supply Voltage Range
V
IN
Inferred by line regulation and dropout voltage
6.9
33
V
Quiescent Current Supply
I
IN
80
100
A
Change in Supply Current
I
IN
/
V
IN
6.9V
V
IN
33V
0.4
0.7
A/V
Note 2: All devices are 100% production tested at T
A
= +25C 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
= +25C 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.
PDF 
ZIP