MAXIM LM4050, LM4051 User Manual
General Description
The LM4050/LM4051 are precision two-terminal, shuntmode, bandgap voltage references available in fixed
reverse breakdown voltages of 1.225V, 2.048V, 2.500V,
3.000V, 3.3V, 4.096V, and 5.000V. Ideal for space-critical applications, the LM4050/LM4051 are offered in the
subminiature 3-pin SC70 surface-mount packages
(1.8mm x 1.8mm), 50% smaller than comparable
devices in SOT23 surface-mount package (SOT23 versions are also available).
Laser-trimmed resistors ensure excellent initial
accuracy. With a 50ppm/°C temperature coefficient,
these devices are offered in three grades of initial accuracy ranging from 0.1% to 0.5%. The LM4050/LM4051
have a 60µA to 15mA shunt-current capability with low
dynamic impedance, ensuring stable reverse breakdown voltage accuracy over a wide range of operating
temperatures and currents. The LM4050/LM4051 do
not require an external stabilizing capacitor while
ensuring stability with any capacitive loads.
The LM4050/LM4051 specifications are guaranteed
over the temperature range of -40°C to +125°C.
________________________Applications
Portable, Battery-Powered Equipment
Notebook Computers
Cell Phones
Industrial Process Controls
Features
o 50ppm/°C (max) Temperature Coefficient
Guaranteed over the -40°C to +125°C
Temperature Range
o Ultra-Small 3-Pin SC70 Package
o 0.1% (max) Initial Accuracy
o Wide Operating Current Range: 60µA to 15mA
o Low 28µV
RMS
Output Noise (10Hz to 10kHz)
o 1.225V, 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and
5.000V Fixed Reverse Breakdown Voltages
o No Output Capacitors Required
o Tolerates Capacitive Loads
LM4050/LM4051
50ppm/°C Precision Micropower Shunt Voltage
References with Multiple Reverse Breakdown Voltages
________________________________________________________________
Maxim Integrated Products
1
Pin Configuration
Typical Operating Circuit
Selector Guide
19-2563; Rev 6; 9/11
Ordering Information appears at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
/V
Denotes an automotive qualified parts.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
V
S
I
+ I
SHUNT
LOAD
R
S
I
LOAD
V
R
I
SHUNT
LM4050
PIN TEMP RANGE
LM 4050_E M3- 2.1+T
LM 4050_E X 3-2.1+T
LM 4050_E M3- 2.5+T
LM 4050_E X 3-2.5+T
LM 4050_E X 3-2.5/V + T
LM 4050_E M3- 3.0+T
LM 4050_E M3- 3.0/V+ T
LM 4050_E X 3-3.0+T
LM 4050_E M3- 3.3+T
LM 4050_E X 3-3.3+T
LM4050_EX3-3.3/V+T
LM 4050_E M3- 4.1+ T
LM 4050_E M3- 4.1/V+ T
LM 4050_E X 3-4.1+T
LM 4050_E M3- 5.0+ T
LM4050_EM3-5.0/V+T
LM 4050_E X 3-5.0+T
LM 4051_E M3- 1.2+ T
LM 4051_E X 3-1.2+T
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
- 40°C to + 125°C
PIN-
PACKAGE
3 SOT23 2.048
3 SC70 2.048
3 SOT23 2.500
3 SC70 2.500
3 SC70 2.500
3 SOT23 3.000
3 SOT23 3.000
3 SC70 3.000
3 SOT23 3.300
3 SC70 3.300
3 SC70 3.300
3 SOT23 4.096
3 SOT23 4.096
3 SC70 4.096
3 SOT23 5.000
3 SOT23 5.000
3 SC70 5.000
3 SOT23 1.225
3 SC70 1.225
OUTPUT
VOLTAGE
(V)
TOP VIEW
1
+
LM4050/
LM4051
-
2
3 N.C.*
*PIN 3 MUST BE LEFT UNCONNECTED OR CONNECTED TO PIN 2.
SC70/SOT23
LM4050/LM4051
50ppm/°C Precision Micropower Shunt Voltage
References with Multiple Reverse Breakdown Voltages
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—1.225V
(IR= 100µA, 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.
Reverse Current (cathode to anode) ..................................20mA
Forward Current (anode to cathode) ..................................10mA
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SC70 (derate 2.17mW/°C above +70°C)............174mW
3-Pin SOT23 (derate 4.01mW/°C above +70°C)..........320mW
Operating Temperature Range
LM4050/LM4051_E_ _ _ ................................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s)..................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Reverse Breakdown Voltage V
Reverse Breakdown Voltage
Tolerance (Note 2)
Minimum Operating Current I
Average Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
Reverse Breakdown Voltage
Change with Operating
Current Change
Reverse Dynamic
Impedance (Note 3)
Wideband Noise e
Reverse Breakdown Voltage
Long-Term Stability
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TA = +25°C
R
LM4051A ±1.2 ±7
V
ΔV
RTOL
RMIN
R
Z
ΔV
LM4051B ±2.4 ±9
LM4051C ±6.0 ±12
IR = 10mA ±20
IR = 1mA ±15 ±50
/ΔT
= 100µA ±15
I
R
I
≤ I
RMIN
1mA ≤ I
IR = 1mA, f = 120Hz, IAC = 0.1I
R
IR = 100µA, 10Hz ≤ f ≤ 10kHz 20 µV
N
T = 1000h 120 ppm
R
≤ 1mA 0.7 1.5
R
≤ 12mA 2.5 8.0
R
LM4051A (0.1%) 1.2238 1.2250 1.2262
LM4051B (0.2%) 1.2226 1.2250 1.2275
LM4051C (0.5%) 1.2189 1.2250 1.2311
45 60 µA
R
0.5 1.5 Ω
V
mV
ppm/°C
mV
RMS
LM4050/LM4051
50ppm/°C Precision Micropower Shunt Voltage
References with Multiple Reverse Breakdown Voltages
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—2.048V
(IR= 100µA, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Reverse Breakdown Voltage V
Reverse Breakdown Voltage
Tolerance (Note 2)
Minimum Operating Current I
Average Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
Reverse Breakdown Voltage
Change with Operating
Current Change
Reverse Dynamic
Impedance (Note 3)
Wideband Noise e
Reverse Breakdown Voltage
Long-Term Stability
TA = +25°C
R
LM4050A ±2.0 ±12
V
ΔV
RTOL
RMIN
R
Z
ΔV
LM4050B ±4.0 ±14
LM4050C ±10 ±20
IR = 10mA ±20
IR = 1mA ±15 ±50
/ΔT
= 100µA ±15
I
R
I
≤ I
RMIN
1mA ≤ I
IR = 1mA, f = 120Hz,
R
I
AC
IR = 100µA, 10Hz ≤ f ≤ 10kHz 28 µV
N
T = 1000h 120 ppm
R
≤ 1mA 0.3 1.0
R
≤ 15mA 2.5 8.0
R
= 0.1I
R LM4050C 0.3 0.9
LM4050A (0.1%) 2.0460 2.0480 2.0500
LM4050B (0.2%) 2.0439 2.0480 2.0521
LM4050C (0.5%) 2.0378 2.0480 2.0582
45 65 µA
LM4050A/B 0.3 0.8
V
mV
ppm/°C
mV
Ω
RMS
LM4050/LM4051
50ppm/°C Precision Micropower Shunt Voltage
References with Multiple Reverse Breakdown Voltages
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—2.500V
(IR= 100µA, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Reverse Breakdown Voltage V
Reverse Breakdown Voltage
Tolerance (Note 2)
Minimum Operating Current I
Average Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
Reverse Breakdown Voltage
Change with Operating
Current Change
Reverse Dynamic
Impedance (Note 3)
Wideband Noise e
Reverse Breakdown Voltage
Long-Term Stability
LM4050A (0.1%) 2.4975 2.5000 2.5025
V
ΔV
R
RTOL
RMIN
/ΔT
R
Z
R
N
ΔV
TA = +25°C
LM4050A ±2.5 ±15
LM4050B ±5.0 ±18
LM4050C ±13 ±25
IR = 10mA ±20
IR = 1mA ±15 ±50
= 100µA ±15
I
R
I
≤ I
RMIN
1mA ≤ I
IR = 1mA, f = 120Hz,
I
AC
IR = 100µA, 10Hz ≤ f ≤ 10kHz 35 µV
T = 1000h 120 ppm
R
≤ 1mA 0.3 1.0
R
≤ 15mA 2.5 8.0
R
= 0.1I
R LM4050C 0.3 0.9
LM4050B (0.2%) 2.4950 2.5000 2.5050
LM4050C (0.5%) 2.4875 2.5000 2.5125
LM4050A/B 0.3 0.8
45 65 µA
V
mV
ppm/°C
mV
Ω
RMS
LM4050/LM4051
50ppm/°C Precision Micropower Shunt Voltage
References with Multiple Reverse Breakdown Voltages
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS—3.000V
(IR= 100µA, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
ELECTRICAL CHARACTERISTICS—3.300V
(IR= 100µA, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Reverse Breakdown Voltage V
Reverse Breakdown Voltage
Tolerance (Note 2)
Minimum Operating Current I
Average Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
Reverse Breakdown Voltage
Change with Operating
Current Change
Reverse Dynamic
Impedance (Note 3)
Wideband Noise e
Reverse Breakdown Voltage
Long-Term Stability
TA = +25°C
R
LM4050A ±3.0 ±18
V
RTOL
LM4050B ±6.0 ±21
LM4050C ±15 ±30
RMIN
IR = 10mA ±20
IR = 1mA ±15 ±50
/ΔT
ΔV
R
= 100µA ±15
I
R
I
≤ I
≤ 1mA 0.3 1.0
R
≤ 15mA 2.5 8.0
R
= 0.1I
R LM4050C 0.3 0.9
Z
ΔV
RMIN
1mA ≤ I
IR = 1mA, f = 120Hz,
R
I
AC
IR = 100µA, 10Hz ≤ f ≤ 10kHz 45 µV
N
T = 1000h 120 ppm
R
LM4050A (0.1%) 2.9970 3.0000 3.0030
LM4050B (0.2%) 2.9940 3.0000 3.0060
LM4050C (0.5%) 2.9850 3.0000 3.0150
45 67 µA
LM4050A/B 0.3 0.8
V
mV
ppm/°C
mV
Ω
RMS
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Reverse Breakdown Voltage V
Reverse Breakdown Voltage
Tolerance (Note 2)
Minimum Operating Current I
Average Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
Reverse Breakdown Voltage
Change with Operating
Current Change
Reverse Dynamic
Impedance (Note 3)
Wideband Noise e
Reverse Breakdown Voltage
Long-Term Stability
TA = +25°C
R
LM4050A ±3.0 ±18
V
RTOL
LM4050B ±6.0 ±21
LM4050C ±15 ±30
RMIN
IR = 10mA ±20
IR = 1mA ±15 ±50
/ΔT
ΔV
R
= 100µA ±15
I
R
I
≤ I
≤ 1mA 0.3 1.0
R
≤ 15mA 2.5 8.0
R
= 0.1I
R LM4050C 0.3 0.9
ΔV
RMIN
1mA ≤ I
Z
IR = 1mA, f = 120Hz,
R
I
AC
IR = 100µA, 10Hz ≤ f ≤ 10kHz 50 µV
N
T = 1000h 120 ppm
R
LM4050A (0.1%) 3.2967 3.3000 3.3033
LM4050B (0.2%) 3.2934 3.3000 3.3066
LM4050C (0.5%) 3.2835 3.3000 3.3165
45 67 µA
LM4050A/B 0.3 0.8
V
mV
ppm/°C
mV
Ω
RMS
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