LM4050_09 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages

19-2563; Rev 4; 5/09
50ppm/°C Precision Micropower Shunt Voltage
References with Multiple Reverse Breakdown Voltages
General Description
The LM4050/LM4051 are precision two-terminal, shunt-
mode, 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-criti-
cal 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 ver-
sions 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 accu-
racy 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 break-
down 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
Typical Operating Circuit
V_S
I_SHUNT + I_LOAD
R_S
I_LOAD
V_R
I_SHUNT
LM4050
Features
♦ 50ppm/°C (max) Temperature Coefficient
Guaranteed over the -40°C to +125°C
Temperature Range
♦ Ultra-Small 3-Pin SC70 Package
♦ 0.1% (max) Initial Accuracy
♦ Wide Operating Current Range: 60µA to 15mA
♦ Low 28µV_RMS Output Noise (10Hz to 10kHz)
♦ 1.225V, 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and
5.000V Fixed Reverse Breakdown Voltages
♦ No Output Capacitors Required
♦ Tolerates Capacitive Loads
Selector Guide
PART
TEMP RANGE
PIN-
PACKAGE
OUTPUT
VOLTAGE
(V)
LM4050_EM3-2.1+T -40°C to +125°C 3 SOT23-3 2.048
LM4050_EX3-2.1+T -40°C to +125°C 3 SC70-3
2.048
LM4050_EM3-2.5+T -40°C to +125°C 3 SOT23-3 2.500
LM4050_EX3-2.5+T -40°C to +125°C 3 SC70-3
2.500
LM4050_EM3-3.0+T -40°C to +125°C 3 SOT23-3 3.000
LM4050_EX3-3.0+T -40°C to +125°C 3 SC70-3
3.000
LM4050_EX3-3.3+T -40°C to +125°C 3 SC70-3
3.300
LM4050_EM3-4.1+T -40°C to +125°C 3 SOT23-3 4.096
LM4050_EX3-4.1+T -40°C to +125°C 3 SC70-3
4.096
LM4050_EM3-5.0+T -40°C to +125°C 3 SOT23-3 5.000
LM4050_EX3-5.0+T -40°C to +125°C 3 SC70-3
5.000
LM4051_EM3-1.2+T -40°C to +125°C 3 SOT23-3 1.225
LM4051_EX3-1.2+T -40°C to +125°C 3 SC70-3
1.225
+Denotes a lead(pb)-free/RoHS-compliant package.
T = Tape and reel.
Ordering Information appears at end of data sheet.
Pin Configuration
TOP VIEW
+1
LM4050/ ^{3 N.C.*}
LM4051
-2
SC70/SOT23
*PIN 3 MUST BE LEFT FLOATING
OR CONNECTED TO PIN 2.
________________________________________________________________ Maxim Integrated Products 1
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or visit Maxim’s website at www.maxim-ic.com.