MAXIM MAX1604EUR-T

19-1613; Rev 0; 1/00
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
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 CLOAD = 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
Ordering Information
PART
TEMP. RANGE
PINPACKAGE
TOP
MARK
MAX6101EUR-T
-40°C to +85°C
3 SOT23-3
FZGT
MAX6102EUR-T
MAX6103EUR-T
MAX6104EUR-T
MAX6105EUR-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
3 SOT23-3
3 SOT23-3
3 SOT23-3
3 SOT23-3
FZGU
FZGV
FZGW
FZGX
Note: There is a minimum order increment of 2500 pieces for
SOT packages.
Selector Guide
PART
OUTPUT
VOLTAGE (V)
MAX6101
1.250
2.5 to 12.6
MAX6102
MAX6103
MAX6104
MAX6105
2.500
3.000
4.096
5.000
(VOUT + 200mV) to 12.6
(VOUT + 200mV) to 12.6
(VOUT + 200mV) to 12.6
(VOUT + 200mV) to 12.6
Typical Operating Circuit
INPUT VOLTAGE
RANGE (V)
Pin Configuration
+SUPPLY INPUT (SEE SELECTOR GUIDE)
TOP VIEW
IN
OUT
REFERENCE
OUT
MAX6101
MAX6102
MAX6103
MAX6104
MAX6105
*
GND
IN
1
OUT 2
MAX6101
MAX6102
MAX6103
MAX6104
MAX6105
3
GND
1µF MAX*
SOT23-3
*CAPACITORS ARE OPTIONAL.
________________________________________________________________ Maxim Integrated Products
1
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.
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MAX6101–MAX6105
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
(VOUT + 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.
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
IN .........................................................................-0.3V to +13.5V
OUT .............................................................-0.3V to (VIN + 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 (TA = +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
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—MAX6101, VOUT = 1.25V
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Output Voltage
SYMBOL
VOUT
Output Voltage Temperature
Coefficient (Notes 2, 3)
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
OUT Short-Circuit Current
ISC
Long-Term Stability
∆VOUT/
time
Output Voltage Hysteresis
(Note 4)
∆VOUT/
cycle
CONDITIONS
TA = +25°C
MIN
TYP
MAX
UNITS
1.245
1.250
1.255
V
0°C to +70°C
65
-40°C to +85°C
75
2.5V ≤ VIN ≤ 12.6V
7
90
Sourcing: 0 ≤ IOUT ≤ 4mA
0.7
0.9
Sinking: -2mA ≤ IOUT ≤ 0
0.03
3.0
ppm/°C
µV/V
mV/mA
Short to GND
25
Short to IN
25
1000h at +25°C
50
ppm/
1000h
130
ppm
mA
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
(Note 3)
eOUT
∆VOUT/
∆VIN
tR
f = 0.1Hz to 10Hz
13
µVp-p
f = 10Hz to 10kHz
15
µVRMS
VIN = 5V ±100mV, f = 120Hz
86
dB
To VOUT = 0.1% of final value, COUT = 50pF
50
µs
COUT
0
1.0
µF
2.5
12.6
V
INPUT CHARACTERISTICS
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
2
Guaranteed by line-regulation test
2.5V ≤ VIN ≤ 12.6V
90
150
µA
4
10
µA/V
_______________________________________________________________________________________
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Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Output Voltage
SYMBOL
VOUT
Output Voltage Temperature
Coefficient (Notes 2, 3)
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Dropout Voltage (Note 5)
VIN VOUT
OUT Short-Circuit Current
ISC
CONDITIONS
TA = +25°C
MIN
TYP
MAX
UNITS
2.490
2.50
2.510
V
0°C to +70°C
65
-40°C to +85°C
75
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
12
300
Sourcing: 0 ≤ IOUT ≤ 5mA
0.6
0.9
Sinking: -2mA ≤ IOUT ≤ 0
0.025
6.0
IOUT = 1mA
50
200
Short to GND
25
Short to IN
25
ppm/°C
µV/V
mV/mA
mV
mA
Long-Term Stability
∆VOUT/
time
1000h at +25°C
50
ppm/
1000h
Output Voltage Hysteresis
(Note 4)
∆VOUT/
cycle
(Note 2)
130
ppm
f = 0.1Hz to 10Hz
27
µVp-p
f = 10Hz to 10kHz
30
µVRMS
VIN = 5V ±100mV, f = 120Hz
86
dB
To VOUT = 0.1% of final value, COUT = 50pF
115
µs
DYNAMIC CHARACTERISTICS
Noise Voltage
eOUT
∆VOUT/
∆VIN
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
(Note 3)
tR
COUT
0
1.0
µF
VOUT +
0.2
12.6
V
INPUT CHARACTERISTICS
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
90
150
µA
4
10
µA/V
_______________________________________________________________________________________
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3
MAX6101–MAX6105
ELECTRICAL CHARACTERISTICS—MAX6102, VOUT = 2.50V
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
ELECTRICAL CHARACTERISTICS—MAX6103, VOUT = 3.0V
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Output Voltage
SYMBOL
VOUT
Output Voltage Temperature
Coefficient (Notes 2, 3)
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Dropout Voltage (Note 5)
VIN VOUT
OUT Short-Circuit Current
ISC
Long-Term Stability
∆VOUT/
time
Output Voltage Hysteresis
(Note 4)
∆VOUT/
cycle
CONDITIONS
TA = +25°C
MIN
TYP
MAX
UNITS
2.988
3.000
3.012
V
0°C to +70°C
65
-40°C to +85°C
75
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
13
400
ppm/°C
µV/V
Sourcing: 0 ≤ IOUT ≤ 5mA
0.5
0.9
Sinking: -2mA ≤ IOUT ≤ 0
0.018
7.0
IOUT = 1mA
50
200
Short to GND
25
Short to IN
25
1000h at +25°C
50
ppm/
1000h
130
ppm
mV/mA
mV
mA
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
(Note 3)
eOUT
∆VOUT/
∆VIN
tR
f = 0.1Hz to 10Hz
35
µVp-p
f = 10Hz to 10kHz
40
µVRMS
VIN = 5V ±100mV, f = 120Hz
76
dB
To VOUT = 0.1% of final value, COUT = 50pF
115
µs
COUT
0
1.0
µF
VOUT +
0.2
12.6
V
INPUT CHARACTERISTICS
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
4
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
90
150
µA
4
10
µA/V
_______________________________________________________________________________________
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Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Output Voltage
SYMBOL
VOUT
Output Voltage Temperature
Coefficient (Notes 2, 3)
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Dropout Voltage (Note 5)
VIN VOUT
OUT Short-Circuit Current
ISC
Long-Term Stability
∆VOUT/
time
Output Voltage Hysteresis
(Note 4)
∆VOUT/
cycle
CONDITIONS
TA = +25°C
MIN
TYP
MAX
UNITS
4.080
4.096
4.112
V
0°C to +70°C
65
-40°C to +85°C
75
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
ppm/°C
20
430
Sourcing: 0 ≤ IOUT ≤ 5mA
0.5
0.9
Sinking: -2mA ≤ IOUT ≤ 0
0.018
8
IOUT = 1mA
50
200
Short to GND
25
Short to IN
25
1000h at +25°C
50
ppm/
1000h
130
ppm
µV/V
mV/mA
mV
mA
DYNAMIC CHARACTERISTICS
Noise Voltage
eOUT
∆VOUT/
∆VIN
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
(Note 3)
tR
f = 0.1Hz to 10Hz
50
µVp-p
f = 10Hz to 10kHz
50
µVRMS
VIN = 5V ±100mV, f = 120Hz
72
dB
To VOUT = 0.1% of final value, COUT = 50pF
190
µs
COUT
0
1.0
µF
VOUT +
0.2
12.6
V
INPUT CHARACTERISTICS
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
90
150
µA
4
10
µA/V
_______________________________________________________________________________________
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5
MAX6101–MAX6105
ELECTRICAL CHARACTERISTICS—MAX6104, VOUT = 4.096V
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
ELECTRICAL CHARACTERISTICS—MAX6105, VOUT = 5.000V
(VIN = +5.2V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Output Voltage
SYMBOL
VOUT
Output Voltage Temperature
Coefficient (Notes 2, 3)
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Dropout Voltage (Note 5)
VIN VOUT
OUT Short-Circuit Current
ISC
Long-Term Stability
∆VOUT/
time
Output Voltage Hysteresis
(Note 4)
∆VOUT/
cycle
CONDITIONS
TA = +25°C
MIN
TYP
MAX
UNITS
4.980
5.000
5.020
V
0°C to +70°C
65
-40°C to +85°C
75
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
ppm/°C
25
550
Sourcing: 0 ≤ IOUT ≤ 5mA
0.4
0.9
Sinking: -2mA ≤ IOUT ≤ 0
0.012
10
IOUT = 1mA
50
200
Short to GND
25
Short to IN
25
1000h at +25°C
50
ppm/
1000h
130
ppm
µV/V
mV/mA
mV
mA
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
(Note 3)
eOUT
∆VOUT/
∆VIN
tR
f = 0.1Hz to 10Hz
60
µVp-p
f = 10Hz to 10kHz
60
µVRMS
VIN = 5V ±100mV, f = 120Hz
65
dB
To VOUT = 0.1% of final value, COUT = 50pF
300
µs
COUT
0
1.0
µF
VOUT +
0.2
12.6
V
INPUT CHARACTERISTICS
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
90
150
µA
4
10
µA/V
Note 1: Devices are 100% production tested at TA = +25°C and are guaranteed by design from TA = TMIN to TMAX by correlation to
sample units characterized over temperature.
Note 2: Temperature coefficient is specified by the “box” method; i.e., the maximum ∆VOUT 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 TA = TMIN to TMAX.
Note 5: Dropout voltage is the minimum input voltage at which VOUT changes ≤ 0.2% from VOUT at VIN = 5.0V (VIN = 5.5V for
MAX6105).
6
_______________________________________________________________________________________
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Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
MAX6102
OUTPUT VOLTAGE TEMPERATURE DRIFT
2.494
2.493
2.492
2.491
3 TYPICAL PARTS
TEMPERATURE RISING
2.490
2.488
4.998
4.996
4.994
-20
0
20
40
60
80
3 TYPICAL PARTS
TEMPERATURE RISING
80
60
40
20
0
-40
-20
0
20
40
60
2
80
4
6
8
10
12
14
TEMPERATURE (°C)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
MAX6102
DROPOUT VOLTAGE vs. SOURCE CURRENT
MAX6102
DROPOUT VOLTAGE vs. SINK CURRENT
DROPOUT VOLTAGE (mV)
VCC = 3.3V
VCC = 2.5V
60
40
TA = +85°C
200
150
100
TA = +25°C
TA = -40°C
50
MAX6101 TOC06
VCC = 5V
100
-10
DROPOUT VOLTAGE (mV)
120
0
MAX6101 TOC05
VCC = 12V
80
250
MAX6101 TOC04
140
-20
-30
TA = -40°C
-40
-50
-60
TA = +85°C
-70
20
TA = +25°C
-80
-90
0
-40
-20
0
20
40
60
0
80
1
2
3
4
0
5
0.5
1.0
1.5
2.0
TEMPERATURE (°C)
SOURCE CURRENT (mA)
SINK CURRENT (mA)
MAX6105
DROPOUT VOLTAGE vs. SOURCE CURRENT
MAX6105
DROPOUT VOLTAGE vs. SINK CURRENT
MAX6102
LOAD REGULATION
TA = -40°C
100
-20
-30
TA = -40°C
-40
-50
-60
TA = +85°C
-70
50
TA = +25°C
-80
0
1
2
7
6
TA = +85°C
SOURCE
SINK
5
4
TA = +25°C
3
2
TA = -40°C
1
TA = -40°C
0
TA = +85°C
TA = +25°C
-1
-2
-90
0
8
OUTPUT VOLTAGE CHANGE (mV)
TA = +25°C
MAX6101 TOC08
200
-10
DROPOUT VOLTAGE (mV)
TA = +85°C
150
0
MAX6101 TOC07
250
2.5
MAX6101 TOC09
0
DROPOUT VOLTAGE (mV)
MAX6101 TOC03
100
4.990
-40
SUPPLY CURRENT (µA)
5.000
4.992
2.489
120
SUPPLY CURRENT (µA)
5.002
OUTPUT VOLTAGE (V)
2.495
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX6101 TOC02
2.496
OUTPUT VOLTAGE (V)
5.004
MAX6101 TOC01
2.497
MAX6105
OUTPUT VOLTAGE TEMPERATURE DRIFT
10
12
_______________________________________________________________________________________
7
3
4
5
6
SOURCE CURRENT (mA)
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0
0.5
1.0
1.5
SINK CURRENT (mA)
2.0
2.5
-6
-4
-2
0
2
4
6
8
LOAD CURRENT (mA)
MAX6101–MAX6105
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
MAX6102
LINE REGULATION
3
TA = +25°C
2
TA = -40°C
1
0.15
TA = -40°C
0.10
0.05
TA = +25°C
0
TA = +85°C
-0.05
0.35
-0.10
-6
-4
-2
0
2
4
6
8
10
0.15
TA = +85°C
0.10
0.05
TA = +25°C
4
6
8
10
12
14
4
6
8
10
12
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
MAX6102
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX6105
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX6101
LINE-TRANSIENT RESPONSE
80
70
60
70
VIN
200mV/div
50
PSRR (dB)
60
50
40
30
40
30
VOUT
200mV/div
20
20
10
10
0.01
0.1
1
10
100
1000
0
0.001
0.01
0.1
1
10
100
FREQUENCY (kHz)
MAX6102
LINE-TRANSIENT RESPONSE
MAX6105
LINE-TRANSIENT RESPONSE
VIN
200mV/div
VOUT
5mV/div
VOUT
100mV/div
100µs/div
OUTPUT IMPEDANCE vs. FREQUENCY
800
700
OUTPUT IMPEDANCE (Ω)
VIN
200mV/div
1000
MAX6101 TOC17
FREQUENCY (kHz)
MAX6101 TOC16
0
0.001
MAX6101 TOC14
80
MAX6101 TOC13
90
14
MAX6101 TOC15
LOAD CURRENT (mA)
100
PSRR (dB)
0.20
-0.05
2
12
TA = -40°C
0.25
0
TA = +85°C
-1
0.30
MAX6101 TOC18
0
TA = -40°C
TA = +25°C
0.20
0.40
MAX6101 TOC12
SINK
MAX6101 TOC11
TA = +85°C
SOURCE
4
0.25
OUTPUT VOLTAGE CHANGE (mV)
MAX6101 TOC10
5
MAX6105
LINE REGULATION
OUTPUT VOLTAGE CHANGE (mV)
MAX6105
LOAD REGULATION
OUTPUT VOLTAGE CHANGE (mV)
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
600
500
400
300
200
100
0
-100
100µs/div
100µs/div
0.01 0.1
1
10
100
1k
FREQUENCY (Hz)
8
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10k 100k 1M
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
MAX6101
LOAD-TRANSIENT RESPONSE
VOUT
200mV/div
MAX6101 TOC20
MAX6101 TOC19
MAX6102
LOAD-TRANSIENT RESPONSE (CLOAD = 0)
VOUT
200mV/div
5mA
4mA
IOUT
5mA/div
IOUT
5mA/div
-2mA
-2mA
200µs/div
200µs/div
MAX6105
LOAD-TRANSIENT RESPONSE (CLOAD = 0)
VOUT
200mV/div
IOUT
5mA/div
MAX6101 TOC22
MAX6101 TOC21
MAX6102
LOAD-TRANSIENT RESPONSE (CLOAD = 1µF)
VIN
2V/div
5mA
VOUT
50mV/div
-2mA
200µs/div
200µs/div
VIN
5V/div
MAX6101
TURN-ON TRANSIENT
MAX6101 TOC24
MAX6101 TOC23
MAX6105
LOAD-TRANSIENT RESPONSE (CLOAD = 1µF)
VIN
2V/div
VOUT
50mV/div
VOUT
00mV/div
100µs/div
100µs/div
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9
MAX6101–MAX6105
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
VIN
2V/div
MAX6105
0.1Hz TO 10Hz OUTPUT NOISE
20µV/div
MAX6101 TOC27
MAX6102
0.1Hz TO 10Hz OUTPUT NOISE
MAX6101 TOC26
MAX6105
TURN-ON TRANSIENT
MAX6101 TOC25
MAX6101–MAX6105
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
20µV/div
VOUT
2V/div
100µs/div
1s/div
Pin Description
PIN
NAME
FUNCTION
1
IN
2
OUT
Reference Output
3
GND
Ground
Input Voltage
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.
10
1s/div
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.
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Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
VCC
+2VS
V+
IN
MAX681
GND
V-
+REF OUTPUT
OUT
MAX6101
MAX6102
MAX6103
MAX6104
MAX6105
1M, 0.1%
V+
OUTPUT
GND
ICL7652
V1M, 0.1%
10nF
-2VS
-REF OUTPUT
Figure 1. Positive and Negative References from Single +3V or +5V Supply
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.
Chip Information
TRANSISTOR COUNT: 117
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.
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11
MAX6101–MAX6105
VS
Low-Cost, Micropower, Low-Dropout,
High-Output-Current, SOT23 Voltage References
MAX6101–MAX6105
Package Information
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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