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MAX6160
User Manual
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Rainbow Electronics MAX6160 User Manual

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19-1177; Rev. 0; 12/96
SOT23, Low-Cost, Low-Dropout,
3-Terminal Voltage References
_______________General Description
The MAX6125/MAX6141/MAX6145/MAX6150/MAX6160 low-dropout, micropower, three-terminal voltage refer­ences offer 2.5V, 4.096V, 4.5V, 5.0V, and adjustable (1.23V to 12.4V) output voltages, respectively. Low, 200mV dropout makes these devices ideal for 3V and 5V systems. Unlike two-terminal references that waste battery current and require an external resistor, the MAX61xx family’s supply current is virtually independent of input voltage variations, which translates to longer battery life.
Initial accuracy for these devices is ±1%. The output temperature coefficient is typically 15ppm/°C, and guaranteed to be less than 50ppm/°C (except for the MAX6160). The MAX6125/MAX6141/MAX6145/ MAX6150 are available in 3-pin SOT23 and 8-pin SO packages. The MAX6160 is available in 4-pin SOT143 and 8-pin SO packages.
_____________________Selector Guide
PART
MAX6125 MAX6141 MAX6145 MAX6150
MAX6160
Typical Operating Circuit appears on last page.
PRESET OUTPUT
VOLTAGE (V)
2.5
4.096
4.5 3 SOT23/8 SO 5
Adjustable
(1.23 to 12.40)
PACKAGE
3 SOT23/8 SO 3 SOT23/8 SO
3 SOT23/8 SO 4 SOT143/8 SO
____________________________Features
♦ 3-Pin SOT23 Package (MAX6125/41/45/50)
4-Pin SOT143 Package (MAX6160)
♦ Low, 200mV Dropout Voltage ♦ 75µA Supply Current, Independent of
Input Voltage
♦ 15ppm/°C Typical Tempco (50ppm/°C max) ♦ Stable for All Capacitive Loads up to 10nF ♦ Adjustable Output Voltage from
1.23V to (VIN- 0.2V) (MAX6160)
♦ Optimized for 3V/5V Operation
________________________Applications
3V/5V Systems Battery-Powered Systems Portable and Hand-Held Equipment Data-Acquisition Systems Instrumentation and Process Control
______________Ordering Information
PART
MAX6125ESA
MAX6125EUR -40°C to +85°C MAX6141ESA MAX6141EUR -40°C to +85°C 3 SOT23-3 ECAA
Ordering Information continued on last page.
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C 8 SO —
PIN-
PACKAGE
8 SO 3 SOT23-3
SOT
TOP MARK
—
EBAA
MAX6125/MAX6141/MAX6145/MAX6150/MAX6160
__________________________________________________________Pin Configurations
TOP VIEW
1
OUT
2
N.C.
3
N.C.
GND
4
( ) ARE FOR MAX6160 ONLY
________________________________________________________________
MAX6125 MAX6141 MAX6145 MAX6150 MAX6160
SO
8
7
6
5
IN N.C. N.C. N.C. (ADJ)
OUT
IN
1
MAX6125 MAX6141 MAX6145 MAX6150
2
SOT23-3
4
GND
1
MAX6160
GND
3
2
ADJ
SOT143
Maxim Integrated Products
OUT
3
IN
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
SOT23, Low-Cost, Low-Dropout, 3-Terminal Voltage References
ABSOLUTE MAXIMUM RATINGS
Voltage (with respect to GND)
IN.......................................................................-0.3V to +13.5V
OUT, ADJ...................................................-0.3V to (V
+ 0.3V)
IN
Output Short-Circuit Duration (to IN or GND).............Continuous
Continuous Power Dissipation (T
= +70°C)
A
8-Pin SO (derate 5.9mW/°C above +70°C)....................471mW
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—MAX6125
(VIN= 2.7V, I
Supply Voltage Output Voltage
Output Voltage Temperature Coefficient
Output Voltage Noise Line Regulation Load Regulation
Quiescent Supply Current
Change in Supply Current vs. Change in Input Voltage
= 0mA, TA= +25°C, unless otherwise noted.) (Note 1)
OUT
∆V
V
OUT
OUT
IN
OUT
OUT
e
n
/∆I
I
Q
TA= T TA= +25°C T
A
TA= T
0.1Hz to 10Hz 10Hz to 10kHz VIN= 2.7V to 12.6V, TA= T
/∆V
IN
I
SOURCE
OUT
I
SINK
TA= +25°C TA= T
VIN= 2.7V to 12.6V
IN
to T
MIN
= T
to T
MIN
to T
MIN
= 0mA to 1mA
= 0mA to 1mA
to T
MIN
3-Pin SOT23 (derate 4mW/°C above +70°C).................320mW
4-Pin SOT143 (derate 4mW/°C above +70°C)...............320mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
CONDITIONS
MAX
2.475 2.500 2.525
MAX
MAX
2.450 2.550
15
500
to T
MIN
MAX
0.4 1
1.15 10 75 100
MAX
130
UNITSMIN TYP MAXSYMBOLPARAMETER
V2.7 12.6V V
ppm/°C15 50TCV
µVp-p
µV/V150∆V
mV/mA
µA
µA/V1.7 6∆IQ/∆V
ELECTRICAL CHARACTERISTICS—MAX6141
(VIN= 4.3V, I
Supply Voltage Output Voltage
Output Voltage Temperature Coefficient
Output Voltage Noise Line Regulation Load Regulation
MAX6125/MAX6141/MAX6145/MAX6150/MAX6160
Quiescent Supply Current
Change in Supply Current vs. Change in Input Voltage
2 _______________________________________________________________________________________
= 0mA, TA= +25°C, unless otherwise noted.) (Note 1)
OUT
∆V
V
OUT
OUT
IN
OUT
OUT
e
n
/∆I
I
Q
TA= T TA= +25°C TA= T
TA= T
0.1Hz to 10Hz 10Hz to 10kHz VIN= 4.3V to 12.6V, TA= T
/∆V
IN
I
SOURCE
OUT
I
SINK
TA= +25°C TA= T
VIN= 4.3V to 12.6V
IN
to T
MIN
to T
MIN
to T
MIN
= 0mA to 1mA
= 0mA to 1mA
to T
MIN
CONDITIONS
MAX
MAX
MAX
MAX
MIN
to T
MAX
4.055 4.096 4.140
4.015 4.180
25
700
0.55 1.6
1.65 16 78 105
130
UNITSMIN TYP MAXSYMBOLPARAMETER
V4.3 12.6V V
ppm/°C15 50TCV
µVp-p
µV/V250∆V
mV/mA
µA
µA/V1.7 6∆IQ/∆V
SOT23, Low-Cost, Low-Dropout,
3-Terminal Voltage References
ELECTRICAL CHARACTERISTICS—MAX6145
(VIN= 4.7V, I
Supply Voltage Output Voltage
Output Voltage Temperature Coefficient
Output Voltage Noise Line Regulation Load Regulation
Quiescent Supply Current
Change in Supply Current vs. Change in Input Voltage
= 0mA, TA= +25°C, unless otherwise noted.) (Note 1)
OUT
∆V
V
OUT
OUT
IN
OUT
OUT
e
n
/∆I
I
Q
TA= T TA= +25°C TA= T
TA= T
0.1Hz to 10Hz 10Hz to 10kHz VIN= 4.7V to 12.6V, TA= T
/∆V
IN
I
SOURCE
OUT
I
SINK
TA= +25°C TA= T
VIN= 4.7V to 12.6V
IN
to T
MIN
to T
MIN
to T
MIN
= 0mA to 1mA
= 0mA to 1mA
to T
MIN
CONDITIONS
MAX
MAX
MAX
MAX
ELECTRICAL CHARACTERISTICS—MAX6150
(VIN= 5.2V, I
Supply Voltage Output Voltage
Output Voltage Temperature Coefficient
Output Voltage Noise Line Regulation Load Regulation
Quiescent Supply Current
Change in Supply Current vs. Change in Input Voltage
= 0mA, TA= +25°C, unless otherwise noted.) (Note 1)
OUT
∆V
V
OUT
OUT
IN
OUT
OUT
e
n
/∆I
I
Q
TA= T TA= +25°C TA= T
TA= T
0.1Hz to 10Hz 10Hz to 10kHz VIN= 5.2V to 12.6V, TA= T
/∆V
IN
I
SOURCE
OUT
I
SINK
TA= +25°C TA= T
VIN= 5.2V to 12.6V
IN
to T
MIN
to T
MIN
to T
MIN
= 0mA to 1mA
= 0mA to 1mA
to T
MIN
CONDITIONS
MAX
MAX
MAX
MAX
MIN
MIN
to T
to T
MAX
MAX
4.455 4.500 4.545
4.410 4.590
30
800
0.6 1.8
1.75 18 79 105
130
4.950 5.000 5.050
4.900 5.100
35
900
0.65 2
1.9 20 80 110
145
MAX6125/MAX6141/MAX6145/MAX6150/MAX6160
UNITSMIN TYP MAXSYMBOLPARAMETER
V4.7 12.6V V
ppm/°C15 50TCV
µVp-p
µV/V250∆V
mV/mA
µA
µA/V1.7 6∆IQ/∆V
UNITSMIN TYP MAXSYMBOLPARAMETER
V5.2 12.6V V
ppm/°C15 50TCV
µVp-p
µV/V150∆V
mV/mA
µA
µA/V1.7 6∆IQ/∆V
_______________________________________________________________________________________ 3
SOT23, Low-Cost, Low-Dropout, 3-Terminal Voltage References
ELECTRICAL CHARACTERISTICS—MAX6160
(VIN= 2.7V; I
Supply Voltage
Output Voltage ADJ Feedback Voltage Threshold
ADJ Input Current Output Voltage
Temperature Coefficient
Output Voltage Noise Line Regulation Load Regulation
Quiescent Supply Current
Change in Supply Current vs. Change in Input Voltage
= 0mA; R1 = 215kΩ ±0.1%, R2 = 208kΩ ±0.1% (circuit of Figure 1); TA= +25°C; unless otherwise noted.) (Notes 1, 2)
OUT
CONDITIONS
∆V
V
I
OUT
OUT
IN
OUT
ADJ
ADJ
e
I
Q
OUT
n
/∆V
/∆I
TA= T TA= T TA= +25°C TA= T
V
ADJ
TA= T
0.1Hz to 10Hz 10Hz to 10kHz VIN= 2.7V to 12.6V, TA= T
IN
I
SOURCE
OUT
I
SINK
TA= +25°C TA= T
VIN= 2.7V to 12.6V
IN
to T
MIN
MAX
to T
MIN
MAX
to T
MIN
MAX
= 1.23V nA
to T
MIN
MAX
to T
MIN
MAX
= 0mA to 1mA
= 0mA to 1mA
to T
MIN
MAX
2.475 2.500 2.525
2.450 2.550
70
15
500
0.35 1
1.15 10 75 100
130
UNITSMIN TYP MAXSYMBOLPARAMETER
V2.7 12.6V V1.23 VIN- 0.2Output Voltage Range
V V1.23V
ppm/°C15 100TCV
µVp-p
µV/V150∆V
mV/mA
µA
µA/V1.7 6∆IQ/∆V
Note 1: All devices are 100% production tested at TA= +25°C, and are guaranteed by design for TA= T Note 2: R1 and R2 program the output voltage in the 1.23V to (V
- 0.2V) range (see the section
IN
Setting the MAX6160 Output Voltage
MIN
to T
as specified.
MAX
).
__________________________________________Typical Operating Characteristics
(VIN= V
100
90
80
70
60
SUPPLY CURRENT (µA)
MAX6125/MAX6141/MAX6145/MAX6150/MAX6160
50
40
2
, I
IN(MIN)
= 0mA, TA = +25°C, unless otherwise noted.)
OUT
SUPPLY CURRENT
vs. INPUT VOLTAGE
VALID OVER V FOR EACH PART
468101214
INPUT VOLTAGE ( V)
IN(MIN)
TO V
IN(MAX) 
MAX6125-TOC01
SUPPLY CURRENT
vs. TEMPERATURE
110 100
V
= 10V
IN
90 80 70 60
V
= 5V
50 40
SUPPLY CURRENT (µA)
30 20 10
IN
-50
-25 0 25 50 75 100 TEMPERATURE (°C)
V
= 3V
IN
MAX6125-TOC02
LOAD REGULATION (mV/mA)
LOAD REGULATION (SOURCING)
vs. TEMPERATURE
1.0
V
= 4.5V (MAX6145)
0.8
0.6
0.4
0.2
0
-50
OUT
V
= 5.0V (MAX6150)
OUT
V
OUT
V
= 2.5V (MAX6125/MAX6160)
OUT
-25 0 25 50 75 100 TEMPERATURE (°C)
MAX6125-TOC03
= 4.096V (MAX6141)
4 _______________________________________________________________________________________
SOT23, Low-Cost, Low-Dropout,
3-Terminal Voltage References
____________________________Typical Operating Characteristics (continued)
(VIN= V
2.5
2.0
1.5
1.0
0.5
LOAD REGULATION (mV/mA)
0
-50
OUTPUT VOLTAGE vs. SOURCE CURRENT
4.501
4.500
4.499
4.498
OUTPUT VOLTAGE (V)
4.497
4.496 0
DROPOUT VOLTAGE vs. TEMPERATURE
120
110
100
90
DROPOUT VOLTAGE (mV)
80
, I
IN(MIN)
= 0mA, TA = +25°C, unless otherwise noted.)
OUT
LOAD REGULATION (SINKING)
vs. TEMPERATURE
V
= 4.5V (MAX6145)
OUT
V
= 5.0V (MAX6150)
OUT
V
= 4.096V (MAX6141)
OUT
V
= 2.5V (MAX6125/MAX6160)
OUT
-25 0 25 50 75 100 TEMPERATURE (°C)
MAX6145
0.5 1.0 1.5 2.0 2.5 SOURCE CURRENT (mA)
MAX6125/MAX6160
I
= 1mA
OUT
OUTPUT VOLTAGE vs. SOURCE CURRENT
2.501
MAX6125-TOC04
2.500
(V)
2.499
2.498
OUTPUT VOLTAGE
2.497
2.496
OUTPUT VOLTAGE vs. SOURCE CURRENT
5.001
MAX6125-TOC07
5.000
4.999
4.998
OUTPUT VOLTAGE (V)
4.997
4.996
100
MAX6125-TOC10
96
92
88
DROPOUT VOLTAGE (mV)
84
MAX6125/MAX6160
0
0.5 1.0 1.5 2.0 2.5 SOURCE CURRENT (mA)
MAX6150
0.5 1.0 1.5 2.0 2.5
0
SOURCE CURRENT (mA)
MAX6141/MAX6145/MAX6150
DROPOUT VOLTAGE vs. TEMPERATURE
I
= 1mA
OUT
OUTPUT VOLTAGE vs. SOURCE CURRENT
4.097
MAX6125-TOC05
4.096
4.095
4.094
OUTPUT VOLTAGE (V)
4.093
4.092 0
400 350
MAX6125-TOC08
300 250 200 150 100
DROPOUT VOLTAGE (mV)
50
0
0.0
ADJ INPUT CURRENT vs. TEMPERATURE
120
100
MAX6125-TOC11
80
60
40
ADJ INPUT CURRENT (nA)
20
MAX6141
0.5 1.0 1.5 2.0 2.5 SOURCE CURRENT (mA)
DROPOUT VOLTAGE 
vs. SOURCE CURRENT
0.5 1.0 1.5 2.52.0 3.53.0 4.0 SOURCE CURRENT (mA)
MAX6160 
VIN = 2.7V
= 1.23V
V
ADJ
MAX6125/MAX6141/MAX6145/MAX6150/MAX6160
MAX6125-TOC06
MAX6125-TOC09
MAX6125-TOC12
70
-50
-25 0 25 50 75 100 TEMPERATURE (°C)
________________________________________________________________________________________
80
-25 0 25 50 75 100
-50 TEMPERATURE (°C)
0
-25 0 25 50 75 100
-50 TEMPERATURE (°C)
5
SOT23, Low-Cost, Low-Dropout, 3-Terminal Voltage References
_____________________________Typical Operating Characteristics (continued)
(VIN= V
1.0
0.5
0
-0.5
CHANGE IN OUTPUT VOLTAGE* (%)
-1.0 2
*
With respect to output voltage at VIN= V
, I
IN(MIN)
= 0mA, TA = +25°C, unless otherwise noted.)
OUT
CHANGE IN OUTPUT VOLTAGE
vs. INPUT VOLTAGE
VALID OVER V FOR EACH PART
468101214
INPUT VOLTAGE (V)
IN(MIN)
TO V
IN(MAX)
MAX6125
LOAD-TRANSIENT RESPONSE (SINKING)
IN(MIN)
CHANGE IN OUTPUT VOLTAGE
vs. TEMPERATURE
0.2
MAX6125-TOC013
.
0.1
0
-0.1
-0.2
CHANGE IN OUTPUT VOLTAGE** (%)
-0.3
-50
-25 0 25 50 75 100 TEMPERATURE (°C)
**
With respect to output voltage at TA= +25°C.
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
140
120
MAX6125-TOC014
100
80
60
PSRR (dB)
40
20
0
0.0001
0.001 0.01 0.1 1 10 FREQUENCY (kHz)
MAX6125
LOAD-TRANSIENT RESPONSE (SOURCING)
MAX6125-TOC15
A
B
10µs/div
A = OUTPUT CURRENT, 1mA/div, I B = OUTPUT VOLTAGE, 200mV/div
= 0mA to -1mA
OUT
A = OUTPUT CURRENT, 1mA/div, I B = OUTPUT VOLTAGE, 50mV/div
MAX6125
LINE-TRANSIENT RESPONSE
0V
MAX6125/MAX6141/MAX6145/MAX6150/MAX6160
0V
A = INPUT VOLTAGE, 100mV/div, V B = OUTPUT VOLTAGE, 20mV/div
5µs/div
= 3V ±50mV
IN
A
B
10µs/div
= 0mA to 1mA
OUT
MAX6125
0.1Hz TO 100Hz NOISE
1sec/div
A
B
50µV/div
6 _______________________________________________________________________________________
SOT23, Low-Cost, Low-Dropout,
3-Terminal Voltage References
______________________________________________________________Pin Description
SO
*
Except MAX6160.
**
MAX6160 only.
V
IN
IN
MAX6160
GND
OUT
ADJ
PIN
SOT23-3
2
—
3
—
1
R1
R2
SOT143
4
—
1
2
3
V
OUT
R1 = 1.06 x 105 (––––) ( kΩ)
R1
R2 = –—––––
V
OUT
–––– - 1
(
V
ADJ
V
= 1.23V
ADJ
Reference OutputOUT1 No Connection. Not internally connected.N.C.2, 3, 5*, 6, 7 GroundGND4
ADJ5**
Adjustable output voltage feedback input. Connect a resistor divider between OUT, ADJ, and GND (Figure 1).
Input VoltageIN8
±5% of this calculated value (nearest standard value plus specified resistor tolerance) to optimize the output voltage temperature coefficient. Using R1 = 215kΩ:
R2 = 215k
V
OUT
V
ADJ
which is also the nearest 0.1% resistor value. Choose R2 according to the following equation:
)
R2 = R1 / (V
For example, a 2.5V output requires R1 = (1.06 x 105) (2.5V / 1.23V) ≈ 215Ω, which is the nearest standard­value 0.1% resistor.
FUNCTIONNAME
OUT
2.5V
1.23V
/ V
-1 208kΩ
≈Ω,
 
- 1)
ADJ
MAX6125/MAX6141/MAX6145/MAX6150/MAX6160
Figure 1. MAX6160 Adjustable Output Circuit
_____________Applications Information
Setting the MAX6160 Output Voltage
Set the output voltage on the MAX6160 by connecting a resistor divider between OUT, ADJ, and GND (Figure 1). Choose R1 according to the following equa­tion:
R1 = (1.06 x 105) (V
where VTH= 1.23V. The scaling factor (1.06 x 105) compensates for the MAX6160's change in ADJ input current over temperature. When R1 is chosen correctly, the change in voltage across R1 caused by the ADJ input current is properly cancelled. Choose R1 to within
_______________________________________________________________________________________ 7
OUT
/ V
ADJ
)(kΩ)
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 pin as possible. Where transient performance is less important, no capacitor is necessary.
Output Bypassing
The MAX6125/MAX6141/MAX6145/MAX6150/MAX6160 do not require an output capacitor. They are stable for capacitive loads from 0nF to 10nF. If your application requires an output charge reservoir (e.g., to decouple the reference from a DAC’s input), then make sure that the total output capacitive load does not exceed 10nF for optimum settling-time performance.
SOT23, Low-Cost, Low-Dropout,
3-Terminal Voltage References
_Ordering Information (continued) __________Typical Operating Circuit
PART
MAX6145ESA
TEMP.
RANGE
-40°C to +85°C 8 SO MAX6145EUR -40°C to +85°C MAX6150ESA
-40°C to +85°C 8 SO MAX6150EUR -40°C to +85°C MAX6160ESA
-40°C to +85°C 8 SO — MAX6160EUS -40°C to +85°C 4 SOT143 JXAA
___________________Chip Information
TRANSISTOR COUNT: 42
PIN-
PACKAGE
3 SOT23-3
3 SOT23-3
SOT
TOP MARK
—
EDAA
—
EEAA
= (V
V
IN
0.1µF*
*OPTIONAL
+ 200mV) to 12.6V
OUT
IN
MAX6125 MAX6141 MAX6145 MAX6150
GND
OUT
V
OUT
________________________________________________________Package Information
B
E
H
S
DIM
A
A1
B C D E
e
H
L
S
α
D
INCHES MILLIMETERS
MIN
0.031
0.001
0.014
0.0034
0.105
0.047
0.070
0.082
0.004
0.017
MAX
0.047
0.005
0.022
0.006
0.120
0.055
0.080
0.098
0.012
0.022
0˚
8˚
MIN
0.787
0.025
0.356
0.086
2.667
1.194
1.778
2.083
0.102
0.432 0˚
MAX
1.194
0.127
0.559
0.152
3.048
1.397
2.032
2.489
0.305
0.559 8˚
21-0051B
A
α
3-PIN SOT23-3
SMALL-OUTLINE
MAX6125/MAX6141/MAX6145/MAX6150/MAX6160
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
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.
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8
8
© 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
© 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
A1
___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
e
C
L
TRANSISTOR PACKAGE
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