Maxim MAX6035AAUR50-T High-supply-voltage, precision voltage reference in sot23 Datasheet

19-2606; Rev 1; 5/03
High-Supply-Voltage, Precision
Voltage Reference in SOT23
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
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
Typical Operating Circuit
Features
♦ Wide Supply Voltage Range: Up to 33V
♦ 25ppm/°C (max) Temperature Coefficient
(-40°C to +85°C)
♦ ±0.2% (max) Initial Accuracy
♦ Small 3-Pin SOT23 Package
♦
♦
♦
♦
95µA (max) Quiescent Supply Current
10mA Source Current, 2mA Sink Current
No Output Capacitor Required
Stable with Capacitive Loads up to 5µF
♦ Output Voltages: 2.5V, 3.0V, 5.0V
Ordering Information
PINPACKAGE
TOP
MARK
PART
TEMP RANGE
MAX6035AAUR25-T
-40°C to +125°C
3 SOT23-3 FZMW
MAX6035BAUR25-T
-40°C to +125°C
3 SOT23-3 FZMX
MAX6035AAUR30-T
-40°C to +125°C
3 SOT23-3 FZMY
MAX6035BAUR30-T
-40°C to +125°C
3 SOT23-3 FZMZ
MAX6035AAUR50-T
-40°C to +125°C
3 SOT23-3 FZNA
MAX6035BAUR50-T
-40°C to +125°C
3 SOT23-3 FZNB
Selector Guide
MAXIMUM
MAXIMUM
OUTPUT
INITIAL
TEMPCO
VOLTAGE
ACCURACY
(ppm/°C)
(V)
(%)
(-40°C to +85°C)
PART
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
+SUPPLY INPUT (SEE SELECTOR GUIDE)
Pin Configuration
IN
OUT
0.1µF*
REFERENCE
OUT
TOP VIEW
IN 1
MAX6035
MAX6035
GND
*CAPACITOR IS OPTIONAL.
3
GND
OUT 2
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
MAX6035
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).
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND)
IN ............................................................................-0.3V to +36V
OUT .............................................................-0.3V to (VIN + 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
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
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.
ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 (2.5V)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
Output Voltage
SYMBOL
VOUT
CONDITIONS
TA = +25°C
TA = 0°C to +70°C
Output Voltage
Temperature Coefficient
(Note 3)
TCVOUT
TA = -40°C to +85°C
TA = -40°C to +125°C
Line Regulation (Note 4)
∆VOUT/∆VIN (VOUT + 2V) ≤ VIN ≤ 33V
TA = +25°C
Load Regulation (Note 4)
∆VOUT/
∆IOUT
TA = -40°C to +125°C
OUT Short-Circuit Current
ISC
Dropout Voltage (Note 7)
VIN - VOUT
2
MIN
TYP
MAX
MAX6035A (0.2%)
2.4950
2.5000
2.5050
MAX6035B (0.5%)
2.4875
2.5000
2.5125
MAX6035A
20
MAX6035B
50
MAX6035A
25
MAX6035B
65
MAX6035A
30
MAX6035B
75
TA = +25°C
4
TA = -40°C to +125°C
15
20
Sourcing:
0 ≤ IOUT ≤ 10mA
25
70
Sinking:
-2mA ≤ IOUT ≤ 0
45
180
UNITS
V
ppm/°C
µV/V
µV/mA
Sourcing:
0 ≤ IOUT ≤ 10mA
85
Sinking:
-2mA ≤ IOUT ≤ 0
225
Short to GND
27
Short to IN
-4
mA
IOUT = 10µA
1.9
IOUT = 10mA
2.25
_______________________________________________________________________________________
V
High-Supply-Voltage, Precision
Voltage Reference in SOT23
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
Thermal Hysteresis (Note 5)
∆VOUT/cycle
CONDITIONS
MIN
TYP
135
MAX
UNITS
ppm
Long-Term Stability
∆VOUT/time 1000hr at +25°C
110
ppm/
1000hr
f = 0.1Hz to 10Hz
21
µVP-P
f = 10Hz to 1kHz
20
µVRMS
86
dB
DYNAMIC CHARACTERISTICS
Output Noise Voltage
en
∆VOUT/∆VIN VIN = 5V ±100mV, f = 120Hz
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability
(Note 6)
tR
To VOUT = 0.1%
of final value
COUT = 50pF
35
COUT = 1µF
240
0
COUT
µs
5
µF
INPUT CHARACTERISTICS
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
∆IIN/∆VIN
Inferred from line regulation and dropout voltage
4.4
33
V
73
95
µA
0.4
0.7
µA/V
MIN
TYP
MAX
UNITS
MAX6035A (0.2%)
2.9940
3.0000
3.0060
MAX6035B (0.5%)
2.9850
3.0000
3.0150
4.4V ≤ VIN ≤ 33V
ELECTRICAL CHARACTERISTICS—MAX6035_AUR30 (3.0V)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
Output Voltage
SYMBOL
VOUT
CONDITIONS
TA = +25°C
TA = 0°C to +70°C
Output Voltage
Temperature Coefficient
(Note 3)
TCVOUT
TA = -40°C to +85°C
TA = -40°C to +125°C
Line Regulation (Note 4)
∆VOUT/
∆VIN
(VOUT + 1.75V) ≤ VIN ≤ 33V
(VOUT + 2V) ≤ VIN ≤ 33V
TA = +25°C
Load Regulation (Note 4)
∆VOUT/
∆IOUT
TA = -40°C to +125°C
MAX6035A
20
MAX6035B
50
MAX6035A
25
MAX6035B
65
MAX6035A
30
MAX6035B
75
TA = +25°C
4.5
V
ppm/°C
15
TA = 0°C to +125°C
24
TA = -40°C to +125°C
24
Sourcing:
0 ≤ IOUT ≤ 10mA
30
81
Sinking:
-2mA ≤ IOUT ≤ 0mA
54
170
µV/V
µV/mA
Sourcing:
0 ≤ IOUT ≤ 10mA
96
Sinking:
-2mA ≤ IOUT ≤ 0mA
230
_______________________________________________________________________________________
3
MAX6035
ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 (2.5V) (continued)
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
ELECTRICAL CHARACTERISTICS—MAX6035_AUR30 (3.0V) (continued)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
Short to GND
27
Short to IN
-4
MAX
UNITS
OUT Short-Circuit Current
ISC
Dropout Voltage (Note 7)
VIN - VOUT
Thermal Hysteresis (Note 5)
∆VOUT/cycle
135
ppm
Long-Term Stability
∆VOUT/time 1000hr at +25°C
120
ppm/
1000hr
f = 0.1Hz to 10Hz
25
µVP-P
f = 10Hz to 1kHz
25
µVRMS
VIN = 5V ±100mV, f = 120Hz
80
dB
TA = 0°C to +125°C
TA = -40°C to +125°C
mA
IOUT = 10µA
1.75
IOUT = 10µA
1.9
IOUT = 10mA
V
2.25
DYNAMIC CHARACTERISTICS
Output Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability
(Note 6)
en
∆VOUT/
∆VIN
tR
VOUT = 0.1% of final value
COUT = 50pF
40
COUT = 1µF
250
µs
0
5
TA = 0°C to +125°C, inferred from line regulation
and dropout voltage
4.75
33
TA = -40°C to +125°C, inferred from line
regulation and dropout voltage
4.9
33
COUT
µF
INPUT CHARACTERISTICS
Supply Voltage Range
VIN
Quiescent Current Supply
IIN
Change in Supply Current
∆IIN/∆VIN
V
4.9V ≤ VIN ≤ 33V
73
95
µA
0.4
0.7
µA/V
ELECTRICAL CHARACTERISTICS—MAX6035_AUR50 (5.0V)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
Output Voltage
SYMBOL
VOUT
CONDITIONS
TA = +25°C
TA = 0°C to +70°C
Output Voltage
Temperature Coefficient
(Note 3)
TCVOUT
TA = -40°C to +85°C
TA = -40°C to +125°C
Line Regulation (Note 4)
4
∆VOUT/∆VIN (VOUT + 2V) ≤ VOUT ≤ 33V
MIN
TYP
MAX
MAX6035A (0.2%)
4.9900
5.0000
5.0100
MAX6035B (0.5%)
4.9750
5.0000
5.0250
MAX6035A
20
MAX6035B
50
MAX6035A
25
MAX6035B
65
MAX6035A
30
MAX6035B
TA = +25°C
TA = -40°C to +125°C
UNITS
V
ppm/°C
75
7.5
25
8
40
_______________________________________________________________________________________
µV/V
High-Supply-Voltage, Precision
Voltage Reference in SOT23
MAX6035
ELECTRICAL CHARACTERISTICS—MAX6035_AUR50 (5.0V) (continued)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
TA = +25°C
∆VOUT/
∆IOUT
Load Regulation (Note 4)
TA = -40°C to +125°C
MIN
TYP
MAX
Sourcing:
0 ≤ IOUT ≤ 10mA
50
135
Sinking:
-2mA ≤ IOUT ≤ 0mA
90
215
UNITS
µV/mA
Sourcing:
0 ≤ IOUT ≤ 10mA
160
Sinking:
-2mA ≤ IOUT ≤ 0mA
300
Shorted to GND
27
Shorted to IN
-4
OUT Short-Circuit Current
ISC
Dropout Voltage (Note 7)
VIN - VOUT
Thermal Hysteresis (Note 5)
∆VOUT/cycle
135
ppm
Long-Term Stability
∆VOUT/time 1000hr at +25°C
160
ppm/
1000hr
f = 0.1Hz to 10Hz
68
µVP-P
f = 10Hz to 1kHz
48
µVRMS
∆VOUT/∆VIN VIN = 15V ±100mV, f = 120Hz
72
dB
mA
IOUT = 10µA
1.9
IOUT = 10mA
2.25
V
DYNAMIC CHARACTERISTICS
Output Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability
(Note 6)
en
tR
To VOUT = 0.1% of final
value
COUT = 50pF
140
COUT = 1µF
300
COUT
µs
0
5
µF
6.9
33
V
80
100
µA
0.4
0.7
µA/V
INPUT CHARACTERISTICS
Supply Voltage Range
VIN
Quiescent Current Supply
IIN
Change in Supply Current
∆IIN/∆VIN
Inferred by line regulation and dropout voltage
6.9V ≤ VIN ≤ 33V
Note 2: All devices are 100% production tested at TA = +25°C and are guaranteed by design for TA = TMIN to TMAX, as specified.
Note 3: Temperature Coefficient is measured by the “box” method, i.e., the maximum ∆VOUT 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 TA = +25°C before and after cycling the device from
TMAX to TMIN.
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 dissipation rating is not exceeded.
_______________________________________________________________________________________
5
Typical Operating Characteristics
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE (V)
2.5015
2.5010
2.5005
2.999
2.997
5.001
5.000
2.995
4.998
2.4995
4.997
-15
10
60
35
110
85
-40
-15
10
35
-40
110
85
60
60
35
110
85
TEMPERATURE (°C)
MAX6035
LINE REGULATION (VOUT = 2.5V)
MAX6035
LINE REGULATION (VOUT = 3V)
MAX6035
LINE REGULATION (VOUT = 5V)
TA = +85°C
2.4995
2.4990
TA = +25°C
2.4985
TA = +85°C
2.9995
OUTPUT VOLTAGE (V)
2.5000
TA = +125°C
3.0000
2.4980
2.9990
TA = +25°C
2.9985
2.9980
2.9975
TA = -40°C
2.9970
2.4975
22
TA = +85°C
4.9985
TA = +25°C
4.9980
TA = -40°C
4.9970
4
34
28
4.9990
4.9975
2.9960
16
TA = +125°C
2.9965
TA = -40°C
2.4970
10
4.9995
MAX6035 toc05
TA = +125°C
3.0005
OUTPUT VOLTAGE (V)
2.5005
10
16
22
28
6
34
10
14
18
22
26
30
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
MAX6035
LOAD REGULATION (VOUT = 2.5V)
MAX6035
LOAD REGULATION (VOUT = 3V)
MAX6035
LOAD REGULATION (VOUT = 5V)
2.4995
TA = +85°C
2.4990
2.4985
2.4980
TA = +25°C
2.4975
TA = +85°C
MAX6035 toc08
2.9995
2.9990
2.9985
2.9980
2.9975
TA = +25°C
2.9970
2.9965
2.4970
2.4965
0
2
4
6
LOAD CURRENT (mA)
8
TA = +85°C
4.999
4.998
4.997
TA = +25°C
4.996
TA = -40°C
TA = -40°C
4.994
2.9955
10
TA = +125°C
5.000
34
4.995
2.9960
TA = -40°C
5.001
OUTPUT VOLTAGE (V)
TA = +125°C
2.5000
TA = +125°C
3.0000
OUTPUT VOLTAGE (V)
2.5005
3.0005
MAX6035 toc07
2.5010
-2
10
TEMPERATURE (°C)
2.5010
4
-15
TEMPERATURE (°C)
MAX6035 toc04
-40
MAX6035 toc06
2.993
2.4990
OUTPUT VOLTAGE (V)
5.002
4.999
2.5000
6
5.003
MAX6035 toc09
OUTPUT VOLTAGE (V)
2.5020
THREE TYPICAL PARTS
5.004
OUTPUT VOLTAGE (V)
3.001
MAX6035 toc03
THREE TYPICAL PARTS
2.5025
5.005
MAX6035 toc02
THREE TYPICAL PARTS
2.5030
3.003
MAX6035 toc01
2.5035
MAX6035AAUR50
OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6035AAUR30
OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6035AAUR25
OUTPUT VOLTAGE TEMPERATURE DRIFT
OUTPUT VOLTAGE (V)
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
-2
0
2
4
6
LOAD CURRENT (mA)
8
10
-2
0
2
4
6
LOAD CURRENT (mA)
_______________________________________________________________________________________
8
10
High-Supply-Voltage, Precision
Voltage Reference in SOT23
MAX6035
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 2.5V)
-20
-60
-60
-80
-80
-80
-100
-100
-100
-120
0.001
0.1
10
1000
0.1
10
1000
0.001
10
1000
FREQUENCY (kHz)
MAX6035
SUPPLY CURRENT
vs. INPUT VOLTAGE (VOUT = 2.5V)
MAX6035
SUPPLY CURRENT
vs. INPUT VOLTAGE (VOUT = 3V)
MAX6035
SUPPLY CURRENT
vs. INPUT VOLTAGE (VOUT = 5V)
TA = +125°C
TA = -40°C
85
TA = +25°C
80
75
70
10
16
22
28
TA = +25°C
80
TA = +125°C
70
4
34
TA = -40°C
85
75
TA = +125°C
70
65
MAX6035 toc15
90
SUPPLY CURRENT (µA)
80
95
MAX6035 toc14
90
SUPPLY CURRENT (µA)
TA = +25°C
75
95
MAX6035 toc13
TA = -40°C
10
16
22
28
34
6
12
18
24
30
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
MAX6035
OUTPUT IMPEDANCE
vs. FREQUENCY (VOUT = 2.5V)
MAX6035
OUTPUT IMPEDANCE
vs. FREQUENCY (VOUT = 3V)
MAX6035
OUTPUT IMPEDANCE
vs. FREQUENCY (VOUT = 5V)
200
100
250
OUTPUT IMPEDANCE (Ω)
OUTPUT IMPEDANCE (Ω)
300
300
300
200
100
MAX6035 toc18
400
MAX6035 toc16
400
MAX6035 toc17
4
0.1
FREQUENCY (kHz)
90
85
-120
0.001
FREQUENCY (kHz)
95
SUPPLY CURRENT (µA)
-40
PSRR (dB)
-60
-120
OUTPUT IMPEDANCE (Ω)
-20
-40
PSRR (dB)
PSRR (dB)
-40
MAX6035 toc12
-20
0
MAX6035 toc11
0
MAX6035 toc10
0
MAX6035
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 5V)
MAX6035
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 3V)
200
150
100
50
0
0
0
0.01
0.1
1
10
FREQUENCY (kHz)
100
1000
0.001
0.1
10
FREQUENCY (kHz)
1000
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
_______________________________________________________________________________________
7
MAX6035
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.)
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.)
MAX6035
0.1Hz to 10Hz OUTPUT NOISE
(VOUT = 5V)
MAX6035
0.1Hz to 10Hz OUTPUT NOISE
(VOUT = 3V)
MAX6035
0.1Hz to 10Hz OUTPUT NOISE
(VOUT = 2.5V)
MAX6035 toc21
MAX6035 toc20
MAX6035 toc19
1s/div
1s/div
1s/div
MAX6035
10Hz to 1kHz OUTPUT NOISE
(VOUT = 2.5V)
MAX6035
10Hz to 1kHz OUTPUT NOISE
(VOUT = 3V)
MAX6035
10Hz to 1kHz OUTPUT NOISE
(VOUT = 5V)
MAX6035 toc22
MAX6035 toc23
50µV/div
MAX6035 toc24
50µV/div
100ms/div
100ms/div
MAX6035
TURN-ON TRANSIENT (VOUT = 3V)
MAX6035 toc25
MAX6035
TURN-ON TRANSIENT (VOUT = 5V)
MAX6035 toc26
CL = 50pF
MAX6035 toc27
CL = 50pF
CL = 50pF
VIN
5V/div
0V
VIN
5V/div
0V
VIN
10V/div
VOUT
1V/div
0V
VOUT
1V/div
0V
VOUT
2V/div
10µs/div
100µV/div
100ms/div
MAX6035
TURN-ON TRANSIENT (VOUT = 2.5V)
8
20µV/div
10µV/div
10µV/div
10µs/div
40µs/div
_______________________________________________________________________________________
High-Supply-Voltage, Precision
Voltage Reference in SOT23
MAX6035
LOAD TRANSIENT (VOUT = 3V)
MAX6035
LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc28
VOUT
AC-COUPLED
100mV/div
VL
10V/div
MAX6035
LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc29
MAX6035 toc30
VOUT
AC-COUPLED
200mV/div
VOUT
AC-COUPLED
100mV/div
VL
10V/div
VL
10V/div
40µs/div
(IOUT = ±250µA, CL = 0, RL = 10kΩ) (Figure 1)
20µs/div
(IOUT = ±250µA, CL = 0, RL = 12kΩ) (Figure 1)
20µs/div
(IOUT = ±250µA, CL = 0, RL = 20kΩ) (Figure 1)
MAX6035
LOAD TRANSIENT (VOUT = 3V)
MAX6035
LOAD TRANSIENT (VOUT = 2.5V)
MAX6035
LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc32
MAX6035 toc31
MAX6035 toc33
VOUT
AC-COUPLED
20mV/div
VOUT
AC-COUPLED
20mV/div
VOUT
AC-COUPLED
20mV/div
VL
5V/div
VL
10V/div
VL
10V/div
100µs/div
(IOUT = ±250µA, CL = 1µF, RL = 10kΩ) (Figure 1)
100µs/div
(IOUT = ±250µA, CL = 1µF, RL = 12kΩ) (Figure 1)
MAX6035
LOAD TRANSIENT (VOUT = 2.5V)
MAX6035
LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc34
100µs/div
(IOUT = ±250µA, CL = 1µF, RL = 20kΩ) (Figure 1)
MAX6035
LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc35
MAX6035 toc36
VOUT
AC-COUPLED
500mV/div
VOUT
AC-COUPLED
500mV/div
VOUT
AC-COUPLED
500mV/div
VL
5V/div
VL
5V/div
VL
10V/div
10µs/div
(IOUT = ±2mA, CL = 0, RL = 1.25kΩ) (Figure 1)
40µs/div
(IOUT = ±2mA, CL = 0, RL = 1.5kΩ) (Figure 1)
20µs/div
(IOUT = ±2mA, CL = 0, RL = 2.5kΩ) (Figure 1)
_______________________________________________________________________________________
9
MAX6035
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.)
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.)
MAX6035
LOAD TRANSIENT (VOUT = 5V)
MAX6035
LOAD TRANSIENT (VOUT = 3V)
MAX6035
LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc38
MAX6035 toc37
MAX6035 toc39
VOUT
AC-COUPLED
100mV/div
VOUT
AC-COUPLED
100mV/div
VOUT
AC-COUPLED
20mV/div
VL
5V/div
VL
10V/div
VL
10V/div
100µs/div
(IOUT = ±2mA, CL = 1µF, RL = 1.5kΩ) (Figure 1)
40µs/div
(IOUT = ±2mA, CL = 1µF, RL = 1.25kΩ) (Figure 1)
MAX6035
LOAD TRANSIENT (VOUT = 2.5V)
200µs/div
(IOUT = ±2mA, CL = 1µF, RL = 2.5kΩ) (Figure 1)
MAX6035
LOAD TRANSIENT (VOUT = 5V)
MAX6035
LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc40
MAX6035 toc42
MAX6035 toc41
VOUT
AC-COUPLED
500mV/div
VOUT
AC-COUPLED
500mV/div
VOUT
AC-COUPLED
20mV/div
VL
5V/div
VL
5V/div
VL
5V/div
20µs/div
(IOUT = 0 to 10mA, CL = 0, RL = 250Ω) (Figure 2)
10
20µs/div
(IOUT = 0 to 10mA, CL = 0, RL = 300Ω) (Figure 2)
200µs/div
(IOUT = 0 to 10mA, CL = 0, RL = 500Ω) (Figure 2)
______________________________________________________________________________________
High-Supply-Voltage, Precision
Voltage Reference in SOT23
MAX6035
LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc43
VOUT
AC-COUPLED
100mV/div
MAX6035
LOAD TRANSIENT (VOUT = 5V)
MAX6035
LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc45
MAX6035 toc44
VOUT
AC-COUPLED
100mV/div
VOUT
AC-COUPLED
100mV/div
VL
5V/div
VL
5V/div
VL
5V/div
100µs/div
(IOUT = 0 to 10mA, CL = 1µF, RL = 250Ω) (Figure 2)
100µs/div
(IOUT = 0 to 10mA, CL = 1µF, RL = 500Ω) (Figure 2)
100µs/div
(IOUT = 0 to 10mA, CL = 1µF, RL = 300Ω) (Figure 2)
MAX6035
LINE TRANSIENT (VOUT = 2.5V)
MAX6035
LINE TRANSIENT (VOUT = 3V)
MAX6035
LINE TRANSIENT (VOUT = 5V)
MAX6035 toc46
MAX6035 toc47
MAX6035 toc48
CL = 0
CL = 0
CL = 0
VIN
500mV/div
VIN
500mV/div
VIN
500mV/div
VOUT
AC-COUPLED
100mV/div
VOUT
AC-COUPLED
100mV/div
VOUT
AC-COUPLED
100mV/div
4µs/div
10µs/div
+VIN
+VIN
MAX6035
4µs/div
MAX6035
VOUT
VOUT
VOUT
VOUT
CL
CL
RL
RL
VL
2VOUT
VL
0V
0V
Figure 1. Load-Transient Test Circuit
VOUT
Figure 2. Load-Transient Test Circuit
______________________________________________________________________________________
11
MAX6035
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.)
High-Supply-Voltage, Precision
Voltage Reference in SOT23
MAX6035
Pin Description
PIN
NAME
FUNCTION
1
IN
2
OUT
Input Voltage
Reference Output
3
GND
Ground
rent, even if the load current is not present at the time.
In the MAX6035 family, the load current is drawn from
the input voltage 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.
Thermal Hysteresis
Applications Information
Input Bypassing
For the best line-transient performance, decouple the
input with a 0.1µF ceramic capacitor as shown in the
Typical Operating Circuit. Locate the capacitor as
close to the device as possible. Where transient performance is less important, no capacitor is necessary.
Output/Load Capacitance
Devices in the MAX6035 family do not require any output capacitance for frequency stability. In applications
where the load or the supply can experience step
changes, an output capacitor of at least 0.1µF reduces
the amount of overshoot (undershoot) and improves the
circuit’s transient response. Many applications do not
require an external capacitor, and the MAX6035 family
can offer a significant advantage in these applications
when board space is critical.
Supply Current
The quiescent supply current of the MAX6035 seriesmode family is typically 73µA and is virtually independent of the supply voltage, with only a 0.7µA/V (max)
variation with supply voltage. In contrast, the quiescent
current of a shunt-mode reference is a function of the
input voltage due to a series resistor connected to the
power supply. Additionally, shunt-mode references
have to be biased at the maximum expected load cur-
12
Thermal hysteresis is the change of output voltage at
TA = +25°C before and after the device is cycled over
its entire operating temperature range. The typical temperature hysteresis value is 135ppm.
Turn-On Time
These devices typically turn on and settle to within
0.1% of their final value in 240µs. Increased output
capacitance also increases turn-on time.
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 through the operating temperature range. Figure 3
shows the maximum allowable reference-voltage temperature coefficient to keep the conversion error to less
than 1LSB, 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.
______________________________________________________________________________________
High-Supply-Voltage, Precision
Voltage Reference in SOT23
MAX6035
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 3. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
Chip Information
TRANSISTOR COUNT: 84
PROCESS: BiCMOS
______________________________________________________________________________________
13
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.
SOT23 L.EPS
MAX6035
High-Supply-Voltage, Precision
Voltage Reference in SOT23
PACKAGE OUTLINE, 3L SOT-23
21-0051
F
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.
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is a registered trademark of Maxim Integrated Products.