MAXIM MAX6035 Technical data
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 current and can source 10mA or sink 2mA of load current.
Unlike conventional shunt-mode (two-terminal) references that waste supply current and require an external
resistor, this device offers a supply current that is virtually independent of the supply voltage and does not
require an external resistor. Additionally, this internally
compensated device does not require an external compensation 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.
Applications
Features
♦ Wide Supply Voltage Range: Up to 33V
♦ 25ppm/°C (max) Temperature Coefficient
(-40°C to +85°C)
♦ ±0.2% (max) Initial Accuracy
♦ 95µA (max) Quiescent Supply Current
♦ 10mA Source Current, 2mA Sink Current
♦ No Output Capacitor Required
♦ Stable with Capacitive Loads up to 5µF
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2606; Rev 3; 11/06
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 -
TOP
MARK
MAX6035AAUR25-T
FZMW
MAX6035BAUR25-T
FZMX
MAX6035ESA25
8 SO —
MAX6035AAUR30-T
FZMY
MAX6035BAUR30-T
FZMZ
MAX6035AAUR50-T
FZNA
MAX6035BAUR50-T
FZNB
(
)
Selector Guide
OUT
1
3 GND
IN
MAX6035
SOT23
TOP VIEW
2
OUT
N.C.GND
1
2
87N.C.
N.C.IN
N.C.
N.C.
SO
3
4
6
5
MAX6035
Pin Configurations
MAX6035
0.1µF*
*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
Note: The 3-pin SOT23 package code is U3-1. The 8-pin SO
package code is S8-2.
PA C K A G E
-40°C to +125°C 3 SOT23-3
-40°C to +125°C 3 SOT23-3
-40°C to +85°C
-40°C to +125°C 3 SOT23-3
-40°C to +125°C 3 SOT23-3
-40°C to +125°C 3 SOT23-3
-40°C to +125°C 3 SOT23-3
MAXIMUM
PART
MAX6035AAUR25 25 0.20 2.5
MAX6035BAUR25 65 0.50 2.5
MAX6035ESA25 40 0.20 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
TEMPCO
(ppm/°C)
-40°C to +85°C
MAXIMUM
INITIAL
ACCURACY
(%)
OUTPUT
VOLTAGE
(V)
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 and MAX6035ESA25 (2.5V)
(VIN= 5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (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 +70°C)............320mW
8-Pin SO (derate 5.9mW/°C above +70°C)...............470.6mW
Operating Temperature Range:
MAX6035ESA ..................................................-40°C to +85°C
MAX6035_AUR ..............................................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
CONDITIONS
UNITS
MAX6035AAUR,
Output Voltage V
OUT
TA = +25°C
MAX6035BAUR
V
MAX6035AAUR 20
TA = 0°C to +70°C
MAX6035BAUR 50
MAX6035AAUR 25
MAX6035ESA 40
TA = -40°C to +85°C
MAX6035BAUR 65
MAX6035AAUR 30
Output Voltage
Temperature Coefficient
(Notes 3 and 6)
TCV
OUT
TA = -40°C to +125°C
MAX6035BAUR 75
ppm/°C
TA = +25°C415
Line Regulation (Note 4)
TA = T
MIN
to T
MAX
20
µV/V
Sourcing:
0 ≤ I
OUT
≤ 10mA
25 70
TA = +25°C,
MAX6035_AUR
Sinking:
-2mA ≤ I
OUT
≤ 0
45 180
Sourcing:
0 ≤ I
OUT
≤ 10mA
85
TA = T
MIN
to T
MAX
,
MAX6035_AUR
Sinking:
-2mA ≤ I
OUT
≤ 0
225
Sourcing:
0 ≤ I
OUT
≤ 10mA
105 175
TA = +25°C,
MAX6035ESA
Sinking:
-2mA ≤ I
OUT
≤ 0
205 375
Sourcing:
0 ≤ I
OUT
≤ 10mA
350
Load Regulation (Note 4)
∆V
OUT
/
∆I
OUT
TA = T
MIN
to T
MAX
,
MAX6035ESA
Sinking:
-2mA ≤ I
OUT
≤ 0
500
µV/mA
Short to GND 27
OUT Short-Circuit Current I
SC
Short to IN -4
mA
Note 1: Continuous power dissipation should also be observed.
SYMBOL
MIN TYP MAX
MAX6035ESA (0.2%)
∆V
/∆VIN(V
OUT
OUT
+ 2V) ≤ VIN ≤ 33V
2.4950 2.5000 2.5050
2.4875 2.5000 2.5125
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
I
OUT
= 10µA 1.9
Dropout Voltage (Note 7)
I
OUT
= 10mA
V
Thermal Hysteresis (Note 5)
135
ppm
Long-Term Stability
1000hr at +25°C 110
ppm/
1000hr
DYNAMIC CHARACTERISTICS
f = 0.1Hz to 10Hz 21
µV
P-P
Output Noise Voltage e
n
f = 10Hz to 1kHz 20
µV
RMS
Ripple Rejection
VIN = 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
= 1µF 240
µs
Capacitive-Load Stability
(Note 6)
C
OUT
05µF
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 µA
Change in Supply Current
4.4V ≤ VIN ≤ 33V 0.4 0.7
µA/V
ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 and MAX6035ESA25 (2.5V)
(continued)
(VIN= 5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage V
OUT
TA = +25°C
V
MAX6035A 20
TA = 0°C to +70°C
MAX6035B 50
MAX6035A 25
TA = -40°C to +85°C
MAX6035B 65
MAX6035A 30
Output Voltage
Temperature Coefficient
(Note 3)
TCV
OUT
TA = -40°C to +125°C
MAX6035B 75
ppm/°C
TA = +25°C 4.5 15
24
Line Regulation (Note 4)
∆V
OUT
/
∆V
IN
(V
OUT
+ 2V) ≤ VIN ≤ 33V
24
µV/V
Sourcing:
0 ≤ I
OUT
≤ 10mA
30 81
TA = +25°C
Sinking:
54 170
Sourcing:
0 ≤ I
OUT
≤ 10mA
96
Load Regulation (Note 4)
∆V
OUT
/
∆I
OUT
TA = -40°C to +125°C
Sinking:
230
µV/mA
ELECTRICAL CHARACTERISTICS—MAX6035_AUR30 (3.0V)
(VIN= 5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
VIN - V
OUT
∆V
/cycl e
OU T
∆V
/time
OUT
∆V
/∆V
OUT
IN
∆IIN/∆V
IN
2.25
MAX6035A (0.2%) 2.9940 3.0000 3.0060
MAX6035B (0.5%) 2.9850 3.0000 3.0150
( V
+ 1.75V ) ≤ V
OU T
≤ 33V
I N
= 0°C to +125°C
T
A
TA = -40°C to +125°C
-2mA ≤ I
-2mA ≤ I
≤ 0mA
OUT
≤ 0mA
OUT
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
TA = 0°C to +125°CI
OUT
= 10µA
I
OUT
= 10µA 1.9Dropout Voltage (Note 7)
TA = -40°C to +125°C
I
OUT
= 10mA
V
Thermal Hysteresis (Note 5)
135
ppm
Long-Term Stability
1000hr at +25°C 120
ppm/
1000hr
DYNAMIC CHARACTERISTICS
f = 0.1Hz to 10Hz 25
µV
P-P
Output Noise Voltage e
n
f = 10Hz to 1kHz 25
µV
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
= 1µF 250
µs
Capacitive-Load Stability
(Note 6)
C
OUT
05µF
INPUT CHARACTERISTICS
TA = 0°C to +125°C, inferred from line regulation
and dropout voltage
33
Supply Voltage Range V
IN
TA = -40°C to +125°C, inferred from line
regulation and dropout voltage
4.9 33
V
Quiescent Current Supply I
IN
73 95 µA
Change in Supply Current
4.9V ≤ VIN ≤ 33V 0.4 0.7 µA/V
ELECTRICAL CHARACTERISTICS—MAX6035_AUR30 (3.0V) (continued)
(VIN= 5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
ELECTRICAL CHARACTERISTICS—MAX6035_AUR50 (5.0V)
(VIN= 5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETER
CONDITIONS
UNITS
Output Voltage V
OUT
TA = +25°C
V
MAX6035A 20
TA = 0°C to +70°C
MAX6035B 50
MAX6035A 25
TA = -40°C to +85°C
MAX6035B 65
MAX6035A 30
Output Voltage
Temperature Coefficient
(Note 3)
TCV
OUT
TA = -40°C to +125°C
MAX6035B 75
ppm/°C
TA = + 25°C 7.5 25
Line Regulation (Note 4)
840
µV/V
VIN - V
OUT
∆V
/cycl e
OU T
∆V
/time
OUT
1.75
2.25
4.75
∆IIN/∆V
∆V
IN
SYMBOL
MAX6035A (0.2%) 4.9900 5.0000 5.0100
MAX6035B (0.5%) 4.9750 5.0000 5.0250
/∆VIN(V
OUT
OUT
+ 2V) ≤ V
≤ 33V
OUT
= - 40°C to + 125°C
T
A
MIN TYP MAX
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS—MAX6035_AUR50 (5.0V) (continued)
(VIN= 5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETER
CONDITIONS
UNITS
Sourcing:
0 ≤ I
OUT
≤ 10mA
50 135
TA = +25°C
Sinking:
90 215
Sourcing:
0 ≤ I
OUT
≤ 10mA
160
Load Regulation (Note 4)
∆V
OUT
/
∆I
OUT
TA = -40°C to +125°C
Sinking:
300
µV/mA
Shorted to GND 27
OUT Short-Circuit Current I
SC
Shorted to IN -4
mA
I
OUT
= 10µA 1.9
Dropout Voltage (Note 7)
I
OUT
= 10mA
V
Thermal Hysteresis (Note 5)
ppm
Long-Term Stability
1000hr at +25°C
ppm/
1000hr
DYNAMIC CHARACTERISTICS
f = 0.1Hz to 10Hz 68
µV
P-P
Output Noise Voltage e
n
f = 10Hz to 1kHz 48
µV
RMS
Ripple Rejection
VIN = 15V ±100mV, f = 120Hz 72 dB
C
OUT
= 50pF
Turn-On Settling Time t
R
To V
OUT
= 0.1% of final
value
C
OUT
= 1µF
µs
Capacitive-Load Stability
(Note 6)
C
OUT
05µF
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 µA
Change in Supply Current
6.9V ≤ VIN ≤ 33V 0.4 0.7
µA/V
Note 2: All devices are 100% production tested at TA= +25°C and are guaranteed by design for TA= 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.
SYMBOL
VIN - V
OUT
∆V
/cycl e 135
OU T
∆V
/time
OUT
∆V
/∆V
OUT
IN
-2mA ≤ I
-2mA ≤ I
OUT
OUT
≤ 0mA
≤ 0mA
MIN TYP MAX
160
140
300
2.25
∆IIN/∆V
IN
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