General Description
The MAX6101–MAX6105 are low-cost, low-dropout
(LDO), micropower voltage references. These three-terminal references operate with an input voltage range from
(V
OUT
+ 200mV) to 12.6V and are available with output
voltage options of 1.25V, 2.5V, 3V, 4.096V, and 5V. They
feature a proprietary curvature-correction circuit and
laser-trimmed thin-film resistors that result in a low temperature coefficient of 75ppm/°C (max) and an initial
accuracy of ±0.4% (max). These devices are specified
over the extended temperature range (-40°C to +85°C).
These series-mode voltage references draw only 90µA of
supply current and can source 5mA and sink 2mA of load
current. Unlike conventional shunt-mode (two-terminal)
references that waste supply current and require an
external resistor, these devices offer a supply current that
is virtually independent of the supply voltage (with only a
4µA/V variation with supply voltage) and do not require an
external resistor. Additionally, these internally compensated devices do not require an external compensation
capacitor and are stable with up to 1µF of load capacitance. Eliminating the external compensation capacitor
saves valuable board area in space-critical applications.
Their LDO voltage and supply-independent, ultra-low
supply current make these devices ideal for battery-operated, high-performance, low-voltage systems.
The MAX6101–MAX6105 are available in tiny 3-pin
SOT23 packages.
Applications
Portable Battery-Powered Systems
Notebook Computers
PDAs, GPSs, DMMs
Cellular Phones
Hard-Disk Drives
Features
♦ Ultra-Small 3-Pin SOT23 Package
♦ Low Cost
♦ Stable with C
LOAD
= 0 to 1µF
♦ 5mA Source Current
♦ ±0.4% max Initial Accuracy
♦ Low 75ppm/°C Temperature Coefficient
♦ 150µA max Quiescent Supply Current
♦ 50mV Dropout at 1mA Load Current
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
________________________________________________________________ Maxim Integrated Products 1
OUT
1
3 GND
IN
MAX6101
MAX6102
MAX6103
MAX6104
MAX6105
SOT23-3
TOP VIEW
2
19-1613; Rev 0; 1/00
Pin Configuration
Ordering Information
Selector Guide
PART
MAX6101EUR-T
MAX6102EUR-T
MAX6103EUR-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-
PACKAGE
3 SOT23-3
3 SOT23-3
3 SOT23-3
TOP
MARK
FZGT
FZGU
FZGV
MAX6104EUR-T
MAX6105EUR-T
-40°C to +85°C
-40°C to +85°C 3 SOT23-3
3 SOT23-3
FZGW
FZGX
PART
MAX6101
MAX6102
MAX6103 3.000
2.500
1.250
OUTPUT
VOLTAGE (V)
INPUT VOLTAGE
RANGE (V)
2.5 to 12.6
(V
OUT
+ 200mV) to 12.6
(V
OUT
+ 200mV) to 12.6
MAX6104
MAX6105 5.000
4.096 (V
OUT
+ 200mV) to 12.6
(V
OUT
+ 200mV) to 12.6
Note: There is a minimum order increment of 2500 pieces for
SOT packages.
Typical Operating Circuit
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
+SUPPLY INPUT (SEE SELECTOR GUIDE)
*
*CAPACITORS ARE OPTIONAL.
MAX6101
MAX6102
MAX6103
MAX6104
MAX6105
IN
OUT REFERENCE
GND
OUT
1µF MAX*
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX6101, V
OUT
= 1.25V
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
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 +13.5V
OUT .............................................................-0.3V to (V
IN
+ 0.3V)
Output Short Circuit to GND or IN (VIN< 6V) ............Continuous
Output Short Circuit to GND or IN (VIN≥ 6V) .........................60s
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SOT23 (derate 4.0mW/°C above +70°C)............320mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
-40°C to +85°C
2.5V ≤ VIN≤ 12.6V
0°C to +70°C
TA= +25°C
Guaranteed by line-regulation test
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
1000h at +25°C
Short to IN
2.5V ≤ VIN≤ 12.6V
Sourcing: 0 ≤ I
OUT
≤ 4mA
Sinking: -2mA ≤ I
OUT
≤ 0
f = 10Hz to 10kHz
Short to GND
f = 0.1Hz to 10Hz
CONDITIONS
µA/V
410
IIN/V
IN
Change in Supply Current
µA
90 150
I
IN
Quiescent Supply Current
V
2.5 12.6
V
IN
Supply Voltage Range
µF
0 1.0
C
OUT
Capacitive-Load Stability Range
(Note 3)
µs
50
t
R
Turn-On Settling Time
dB
86
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
15
µVp-p
13
e
OUT
Noise Voltage
75
ppm/°C
65
TCV
OUT
V
1.245 1.250 1.255
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient (Notes 2, 3)
ppm
130
∆V
OUT
/
cycle
Output Voltage Hysteresis
(Note 4)
ppm/
1000h
50
∆V
OUT
/
time
Long-Term Stability
25
µV/V
790
∆V
OUT
/
∆V
IN
Line Regulation
mV/mA
0.7 0.9
∆V
OUT
/
∆I
OUT
Load Regulation
0.03 3.0
mA
25
I
SC
OUT Short-Circuit Current
UNITSMIN TYP MAXSYMBOLPARAMETER
DYNAMIC CHARACTERISTICS
INPUT CHARACTERISTICS
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—MAX6102, V
OUT
= 2.50V
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
-40°C to +85°C
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
0°C to +70°C
TA= +25°C
Guaranteed by line-regulation test
(Note 2)
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
1000h at +25°C
Short to IN
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
Sourcing: 0 ≤ I
OUT
≤ 5mA
Sinking: -2mA ≤ I
OUT
≤ 0
f = 10Hz to 10kHz
Short to GND
f = 0.1Hz to 10Hz
CONDITIONS
µA/V
410
IIN/V
IN
Change in Supply Current
µA
90 150
I
IN
Quiescent Supply Current
V
V
OUT
+
12.6
0.2
V
IN
Supply Voltage Range
µF
0 1.0
C
OUT
Capacitive-Load Stability Range
(Note 3)
µs
115
t
R
Turn-On Settling Time
dB
86
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
30
µVp-p
27
e
OUT
Noise Voltage
75
ppm/°C
65
TCV
OUT
V
2.490 2.50 2.510
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient (Notes 2, 3)
ppm
130
∆V
OUT
/
cycle
Output Voltage Hysteresis
(Note 4)
ppm/
1000h
50
∆V
OUT
/
time
Long-Term Stability
25
µV/V
12 300
∆V
OUT
/
∆V
IN
Line Regulation
mV/mA
0.6 0.9
∆V
OUT
/
∆I
OUT
Load Regulation
0.025 6.0
mA
25
I
SC
OUT Short-Circuit Current
UNITSMIN TYP MAXSYMBOLPARAMETER
I
OUT
= 1mA mV
50 200
V
IN
-
V
OUT
Dropout Voltage (Note 5)
DYNAMIC CHARACTERISTICS
INPUT CHARACTERISTICS
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX6103, V
OUT
= 3.0V
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
I
OUT
= 1mA mV
-40°C to +85°C
50 200
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
0°C to +70°C
TA= +25°C
Guaranteed by line-regulation test
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
1000h at +25°C
Short to IN
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
Sourcing: 0 ≤ I
OUT
≤ 5mA
Sinking: -2mA ≤ I
OUT
≤ 0
f = 10Hz to 10kHz
Short to GND
f = 0.1Hz to 10Hz
CONDITIONS
V
IN
-
V
OUT
Dropout Voltage (Note 5)
µA/V
410
IIN/V
IN
Change in Supply Current
µA
90 150
I
IN
Quiescent Supply Current
V
V
OUT
+
12.6
0.2
V
IN
Supply Voltage Range
µF
0 1.0
C
OUT
Capacitive-Load Stability Range
(Note 3)
µs
115
t
R
Turn-On Settling Time
dB
76
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
40
µVp-p
35
e
OUT
Noise Voltage
75
ppm/°C
65
TCV
OUT
V
2.988 3.000 3.012
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient (Notes 2, 3)
ppm
130
∆V
OUT
/
cycle
Output Voltage Hysteresis
(Note 4)
ppm/
1000h
50
∆V
OUT
/
time
Long-Term Stability
25
µV/V
13 400
∆V
OUT
/
∆V
IN
Line Regulation
mV/mA
0.5 0.9
∆V
OUT
/
∆I
OUT
Load Regulation
0.018 7.0
mA
25
I
SC
OUT Short-Circuit Current
UNITSMIN TYP MAXSYMBOLPARAMETER
DYNAMIC CHARACTERISTICS
INPUT CHARACTERISTICS
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS—MAX6104, V
OUT
= 4.096V
(VIN= +5V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
I
OUT
= 1mA mV
-40°C to +85°C
50 200
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
0°C to +70°C
TA= +25°C
Guaranteed by line-regulation test
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
1000h at +25°C
Short to IN
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
Sourcing: 0 ≤ I
OUT
≤ 5mA
Sinking: -2mA ≤ I
OUT
≤ 0
f = 10Hz to 10kHz
Short to GND
f = 0.1Hz to 10Hz
CONDITIONS
V
IN
-
V
OUT
Dropout Voltage (Note 5)
µA/V
410
IIN/V
IN
Change in Supply Current
µA
90 150
I
IN
Quiescent Supply Current
V
V
OUT
+
12.6
0.2
V
IN
Supply Voltage Range
µF
0 1.0
C
OUT
Capacitive-Load Stability Range
(Note 3)
µs
190
t
R
Turn-On Settling Time
dB
72
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
50
µVp-p
50
e
OUT
Noise Voltage
75
ppm/°C
65
TCV
OUT
V
4.080 4.096 4.112
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient (Notes 2, 3)
ppm
130
∆V
OUT
/
cycle
Output Voltage Hysteresis
(Note 4)
ppm/
1000h
50
∆V
OUT
/
time
Long-Term Stability
25
µV/V
20 430
∆V
OUT
/
∆V
IN
Line Regulation
mV/mA
0.5 0.9
∆V
OUT
/
∆I
OUT
Load Regulation
0.018 8
mA
25
I
SC
OUT Short-Circuit Current
UNITSMIN TYP MAXSYMBOLPARAMETER
DYNAMIC CHARACTERISTICS
INPUT CHARACTERISTICS
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX6105, V
OUT
= 5.000V
(VIN= +5.2V, I
OUT
= 0, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
I
OUT
= 1mA mV
-40°C to +85°C
50 200
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
0°C to +70°C
TA= +25°C
Guaranteed by line-regulation test
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
VIN= 5V ±100mV, f = 120Hz
1000h at +25°C
Short to IN
(V
OUT
+ 0.2V) ≤ VIN≤ 12.6V
Sourcing: 0 ≤ I
OUT
≤ 5mA
Sinking: -2mA ≤ I
OUT
≤ 0
f = 10Hz to 10kHz
Short to GND
f = 0.1Hz to 10Hz
CONDITIONS
V
IN
-
V
OUT
Dropout Voltage (Note 5)
µA/V
410
IIN/V
IN
Change in Supply Current
µA
90 150
I
IN
Quiescent Supply Current
V
V
OUT
+
12.6
0.2
V
IN
Supply Voltage Range
µF
0 1.0
C
OUT
Capacitive-Load Stability Range
(Note 3)
µs
300
t
R
Turn-On Settling Time
dB
65
∆V
OUT
/
∆V
IN
Ripple Rejection
µV
RMS
60
µVp-p
60
e
OUT
Noise Voltage
75
ppm/°C
65
TCV
OUT
V
4.980 5.000 5.020
V
OUT
Output Voltage
Output Voltage Temperature
Coefficient (Notes 2, 3)
ppm
130
∆V
OUT
/
cycle
Output Voltage Hysteresis
(Note 4)
ppm/
1000h
50
∆V
OUT
/
time
Long-Term Stability
25
µV/V
25 550
∆V
OUT
/
∆V
IN
Line Regulation
mV/mA
0.4 0.9
∆V
OUT
/
∆I
OUT
Load Regulation
0.012 10
mA
25
I
SC
OUT Short-Circuit Current
UNITSMIN TYP MAXSYMBOLPARAMETER
DYNAMIC CHARACTERISTICS
INPUT CHARACTERISTICS
Note 1: Devices are 100% production tested at TA= +25°C and are guaranteed by design from TA= T
MIN
to T
MAX
by correlation to
sample units characterized over temperature.
Note 2: Temperature coefficient is specified by the “box” method; i.e., the maximum ∆V
OUT
is divided by the maximum ∆t.
Note 3: Not production tested. Guaranteed by design.
Note 4: Thermal hysteresis is defined as the change in +25°C output voltage before and after temperature cycling of the device
from T
A
= T
MIN
to T
MAX
.
Note 5: Dropout voltage is the minimum input voltage at which V
OUT
changes ≤ 0.2% from V
OUT
at VIN= 5.0V (VIN= 5.5V for
MAX6105).
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
_______________________________________________________________________________________ 7
2.488
2.491
2.490
2.489
2.493
2.492
2.497
2.496
2.495
2.494
-40 -20 0 20 40 60 80
MAX6102
OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6101 TOC01
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3 TYPICAL PARTS
TEMPERATURE RISING
4.990
4.996
4.994
4.992
5.000
4.998
5.004
5.002
-40 -20 0 20 40 60 80
MAX6105
OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6101 TOC02
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3 TYPICAL PARTS
TEMPERATURE RISING
0
40
20
80
60
100
120
28104 6 12 14
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX6101 TOC03
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
0
60
40
20
100
80
140
120
-40 -20 0 20 40 60 80
SUPPLY CURRENT vs. TEMPERATURE
MAX6101 TOC04
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
VCC = 12V
VCC = 5V
VCC = 2.5V
VCC = 3.3V
0
50
150
100
200
250
012345
MAX6102
DROPOUT VOLTAGE vs. SOURCE CURRENT
MAX6101 TOC05
SOURCE CURRENT (mA)
DROPOUT VOLTAGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
-90
-70
-30
-50
-10
-80
-40
-60
-20
0
0 0.5 1.0 1.5 2.0 2.5
MAX6102
DROPOUT VOLTAGE vs. SINK CURRENT
MAX6101 TOC06
SINK CURRENT (mA)
DROPOUT VOLTAGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
0
50
150
100
200
250
021 3456
MAX6105
DROPOUT VOLTAGE vs. SOURCE CURRENT
MAX6101 TOC07
SOURCE CURRENT (mA)
DROPOUT VOLTAGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
-90
-70
-30
-50
-10
-80
-40
-60
-20
0
0 0.5 1.0 1.5 2.0 2.5
MAX6105
DROPOUT VOLTAGE vs. SINK CURRENT
MAX6101 TOC08
SINK CURRENT (mA)
DROPOUT VOLTAGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
-2
0
-1
2
1
4
3
5
7
6
8
-6 -2 0 2-4 4 6 8 10 12
MAX6102
LOAD REGULATION
MAX6101 TOC09
LOAD CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +85°C
TA = +85°C
TA = +25°C
TA = +25°C
TA = -40°C
TA = -40°C
SINK SOURCE
Typical Operating Characteristics
(TA= +25°C, unless otherwise noted.)
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
8 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(TA= +25°C, unless otherwise noted.)
-1
0
2
1
4
3
5
-6 -2 0 2-4 4 6 8 10 12
MAX6105
LOAD REGULATION
MAX6101 TOC10
LOAD CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +85°C
TA = +85°C
TA = +25°C
TA = +25°C
TA = -40°C
TA = -40°C
SINK SOURCE
-0.10
0
-0.05
0.10
0.05
0.20
0.15
0.25
2684 101214
MAX6102
LINE REGULATION
MAX6101 TOC11
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
-0.05
0.15
0
0.25
0.20
0.35
0.30
0.40
4 6 8 10 12 14
MAX6105
LINE REGULATION
MAX6101 TOC12
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (mV)
0.05
0.10
TA = +85°C
TA = +25°C
TA = -40°C
100
90
80
70
60
50
40
30
20
0
0.001 1 10 1000.01 0.1 1000
MAX6102
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
10
MAX6101 TOC13
FREQUENCY (kHz)
PSRR (dB)
80
70
60
50
40
30
20
0
0.001 1 10 1000.01 0.1 1000
MAX6105
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
10
MAX6101 TOC14
FREQUENCY (kHz)
PSRR (dB)
MAX6101
LINE-TRANSIENT RESPONSE
MAX6101 TOC15
100µs/div
V
IN
200mV/div
V
OUT
200mV/div
MAX6102
LINE-TRANSIENT RESPONSE
MAX6101 TOC16
100µs/div
V
IN
200mV/div
V
OUT
100mV/div
MAX6105
LINE-TRANSIENT RESPONSE
MAX6101 TOC17
100µs/div
V
IN
200mV/div
V
OUT
5mV/div
0.01 100 10k10.1 10 1k 100k 1M
OUTPUT IMPEDANCE vs. FREQUENCY
MAX6101 TOC18
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
-100
100
0
300
200
400
600
700
500
800
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
_______________________________________________________________________________________ 9
MAX6105
LOAD-TRANSIENT RESPONSE (C
LOAD
= 0)
MAX6101 TOC21
200µs/div
5mA
-2mA
V
OUT
200mV/div
I
OUT
5mA/div
MAX6102
LOAD-TRANSIENT RESPONSE (C
LOAD
= 1µF)
MAX6101 TOC22
200µs/div
V
IN
2V/div
V
OUT
50mV/div
MAX6105
LOAD-TRANSIENT RESPONSE (C
LOAD
= 1µF)
MAX6101 TOC23
100µs/div
V
IN
5V/div
V
OUT
50mV/div
MAX6101
TURN-ON TRANSIENT
MAX6101 TOC24
100µs/div
V
IN
2V/div
V
OUT
Typical Operating Characteristics (continued)
(TA= +25°C, unless otherwise noted.)
MAX6101
LOAD-TRANSIENT RESPONSE
MAX6101 TOC19
200µs/div
4mA
-2mA
V
OUT
200mV/div
I
OUT
5mA/div
MAX6102
LOAD-TRANSIENT RESPONSE (C
LOAD
= 0)
MAX6101 TOC20
200µs/div
5mA
-2mA
V
OUT
200mV/div
I
OUT
5mA/div
MAX6101–MAX6105
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 IN as possible. Where transient performance is
less important, no capacitor is necessary.
Output/Load Capacitance
Devices in the MAX6101 family do not require an output
capacitance for frequency stability. They are stable for
capacitive loads from 0 to 1µF. However, in applications
where the load or the supply can experience step
changes, an output capacitor will reduce the amount of
overshoot (undershoot) and improve the circuit’s
transient response. Many applications do not require an
external capacitor, and the MAX6101 family can offer a
significant advantage in these applications when board
space is critical.
Supply Current
The quiescent supply current of the series-mode
MAX6101 family is typically 90µA and is virtually independent of the supply voltage, with only a 10µA/V (max) variation with supply voltage. Unlike series references,
shunt-mode references operate with a series resistor connected to the power supply. The quiescent current of a
shunt-mode reference is thus a function of the input voltage. Additionally, shunt-mode references have to be
biased at the maximum expected load current, even if the
load current is not present at the time. In the MAX6101
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. When the supply voltage is below the
minimum specified input voltage (as during turn-on), the
devices can draw up to 400µA beyond the nominal
supply current. The input voltage source must be capable
of providing this current to ensure reliable turn-on.
Output Voltage Hysteresis
Output voltage hysteresis is the change of 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 bandgap core transistors. The typical temperature hysteresis value is 130ppm.
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(TA= +25°C, unless otherwise noted.)
NAME FUNCTION
1 IN Input Voltage
2 OUT Reference Output
PIN
3 GND Ground
Pin Description
MAX6105
TURN-ON TRANSIENT
MAX6101 TOC25
100µs/div
V
IN
2V/div
V
OUT
2V/div
MAX6102
0.1Hz TO 10Hz OUTPUT NOISE
MAX6101 TOC26
1s/div
20µV/div
MAX6105
0.1Hz TO 10Hz OUTPUT NOISE
MAX6101 TOC27
1s/div
20µV/div
Turn-On Time
These devices typically turn on and settle to within 0.1%
of their final value in 50µs to 300µs. The turn-on time can
increase up to 1.5ms with the device operating at the
minimum dropout voltage and the maximum load.
Positive and Negative Low-Power
Voltage Reference
Figure 1 shows a typical method for developing a bipolar
reference. The circuit uses a MAX681 voltage
doubler/inverter charge-pump converter to power an
ICL7652, thus creating a positive as well as a negative
reference voltage.
Chip Information
TRANSISTOR COUNT: 117
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
______________________________________________________________________________________ 11
Figure 1. Positive and Negative References from Single +3V or +5V Supply
V
S
V+
V
CC
MAX681
GND
V-
-2V
+2V
S
IN
OUT
MAX6101
MAX6102
MAX6103
MAX6104
MAX6105
GND
S
1M, 0.1%
1M, 0.1%
10nF
V+
ICL7652
V-
OUTPUT
+REF OUTPUT
-REF OUTPUT
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information
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